iOS 开发库（iOS Developer Library）

太阳火神的美丽人生 (http://blog.csdn.net/opengl_es)

本文遵循“署名-非商业用途-保持一致”创作公用协议

转载请保留此句：太阳火神的美丽人生 -  本博客专注于 敏捷开发及移动和物联设备研究：iOS、Android、Html5、Arduino、pcDuino，否则，出自本博客的文章拒绝转载或再转载，谢谢合作。

以下为详尽部分，如感觉过于冗长，可移步《iOS 开发库概要（iOS Developer Library Summary）》。

iOS 开发库组织结构，按三种方式对共计 1687 份文档进行分类管理：

1、按资源类型（Resource Types）分类：所有文档都属于某个分类；

2、按主题（Topics）分类：大多数文档会属于某个主题；

3、按框架（Frameworks）所处操作系统层次结构分类：编程指南及参考手册大多会属于某个框架；

有三部分是最基础的：

1、语言与开发工具：

语言与工具（Languages & Utilities）：共39篇

OS X 免费提供了软件开发工具以及编程和脚本语言用于创建绝妙的软件。使用这些工具和语言可以构建、调试和优化软件应用。

Create stunning software with the software development tools and programming-and-scripting language support that are supplied free with OS X. Use these tools and languages to build, debug, and optimize software applications.

Objective-C语言相关全部文档列于下表，有 5 篇必看，按阅读先后顺序排列如下：

• 学习Objective-C：入门
• Objective-C 编程语言
• Objective-C 面向对象编程
• Objective-C 编程
• 过渡到 ARC 发布说明
  

Title	Resource Type	Topic	Framework	Date
Objective-C 编程语言 The Objective-C Programming Language Introduces object-oriented programming and describes the main programming language used for Cocoa development. Last change: Minor updates and corrections regarding current use of declared properties.	Guides	Languages & Utilities Objective-C		2011-10-12 Minor Change
Objective-C 编程 Programming with Objective-C Describes elements of best practice when writing code with Objective-C using ARC. Last change: New document.	Guides	Languages & Utilities Objective-C		2012-07-20 First Version
Objective-C 运行时编程指南 Objective-C Runtime Programming Guide Describes the Objective-C 2.0 runtime support library. Last change: Made minor editorial changes.	Guides	Languages & Utilities Objective-C		2009-10-19 Minor Change
Objective-C 面向对象编程 Object-Oriented Programming with Objective-C Describes object-oriented programming from the perspective of an Objective-C developer. Last change: Edited for content and clarity.	Guides	Languages & Utilities Objective-C		2010-11-15 Minor Change
学习Objective-C：入门 Learning Objective-C: A Primer Provides an introduction to the Objective-C language. Last change: Corrected a minor error in a code example.	Guides	Languages & Utilities Objective-C		2010-09-01 Minor Change
块编程主题 Blocks Programming Topics Describes the Blocks feature for the C programming language. Last change: Corrected typographical errors.	Guides	Languages & Utilities Objective-C		2011-03-08 Minor Change
Objective-C 运行时参考手册 Objective-C Runtime Reference Describes the data structures and functions of the Objective-C runtime support library. Last change: Removed obsolete functions marg-related API (such as marg_setValue).	Reference	Languages & Utilities Objective-C	Foundation	2010-06-17 Minor Change
过渡到 ARC 发布说明 Transitioning to ARC Release Notes Describes how to transition code from manual retain/release to use ARC. Last change: Updated for OS X v10.8.	Release Notes	Languages & Utilities Objective-C		2012-07-17 Content Update
Objective-C 实用特性索引 Objective-C Feature Availability Index Describes availability of Objective-C features by tools release. Last change: Updated availability of features for iOS 6 SDK.	Release Notes	Languages & Utilities Objective-C		2012-09-19 Minor Change
Objective-C 中改进的调试日志 Improved logging in Objective-C QA1669: describes use of preprocessor macros and Objective-C language features to provide better context in log statements. Last change: Expanded logging examples.	Technical Q&As	Languages & Utilities Objective-C		2011-10-04 Minor Change
2012 苹果全球开发者大会：现代化的 Objective-C WWDC 2012: Modern Objective-C Write more concise and less error-prone code with ARC. Last change: New document.	Video	Languages & Utilities Objective-C		2012-09-19 First Version
2012 苹果全球开发者大会：迁移到现代化的 Objective-C WWDC 2012: Migrating to Modern Objective-C Dramatically reduce the amount of code you write, to create cleaner, safer, and better code. Last change: New document.	Video	Languages & Utilities Objective-C		2012-09-19 First Version
2012 苹果全球开发者大会：采用自动引用计数 WWDC 2012: Adopting Automatic Reference Counting Move your project to LLVM and ARC to give your application great performance. Last change: New document.	Video	Languages & Utilities Objective-C		2012-09-19 First Version

2、基于操作系统的语言特性：

基础框架（Foundation）：共206篇

使用基础框架作为 Objective-C 编程的基本要素。该框架提供了基本的 Objective-C 类，最重要的根类 NSObject 定义了对象的基本行为。它包含了用对象来表示基本数据类型、集合以及操作系统服务的类。基础框架也引入了许多设计模式和一些有助于 Objective-C 稳健、高效地编程的机制。基础框架（Foundation）和用户界面开发包（UIKit）一起，提供了实现图形化、事件驱动的 iOS 应用所需的基本工具和基础设施。

Use the Foundation framework for the "nuts and bolts" classes for Objective-C programming. This framework provides essential Objective-C classes, most importantly the root class, NSObject, which defines basic object behavior. It includes classes for objects representing basic data types, collections, and operating-system services. Foundation also introduces several design patterns and mechanisms that contribute to the robustness and efficiency of Objective-C programs. Along with UIKit, the Foundation framework provides the basic tools and infrastructure you need to implement graphical, event-driven iOS applications.

Title	Resource Type	Topic	Framework	Date
高级内存管理编程指南 Advanced Memory Management Programming Guide Explains how to allocate and deallocate objects in Cocoa. Last change: Updated to describe autorelease in terms of @autoreleasepool blocks.	Guides	Performance	Foundation	2012-07-17 Minor Change
流编程指南 Stream Programming Guide Explains how to use the Cocoa stream classes to read data from and write data to streams. Last change: Clarified behavior of CFStreamCreatePairWithSocketToHost.	Guides	Networking & Internet Protocol Streams	Foundation	2012-09-19 Minor Change
URL 加载系统编程指南 URL Loading System Programming Guide Explains how to manipulate URLs and transfer URL contents. Last change: Fixed typos and removed deprecated symbols from code examples.	Guides	Networking & Internet Protocol Streams	Foundation	2010-09-01 Minor Change
事件驱动的 XML 编程指南 Event-Driven XML Programming Guide Explains how to process XML documents using the Cocoa streaming parser. Last change: Update example code to new initializer pattern.	Guides	Data Management	Foundation	2010-03-24 Minor Change
谓词编程指南 Predicate Programming Guide Describes how to specify queries in Cocoa. Last change: Revised introductory article for clarity; corrected minor error in Predicate Format String From a Spotlight Search in Finder.	Guides	Data Management	Foundation	2010-06-14 Minor Change
还原架构 Undo Architecture Explains how to record information in Cocoa so a user can reverse an operation's effect. Last change: Added "Undo and the Document Architecture," "Undo and the Model Layer," and "Undo and the Control and View Layers" sections to "Using Undo in AppKit-Based Applications." Corrected typos.	Guides	Data Management	Foundation	2011-06-03 Minor Change
二进制数据编程指南 Binary Data Programming Guide Explains how to create and use Cocoa data objects, object-oriented wrappers for byte buffers. Last change: Added links to Cocoa Core Competencies.	Guides	Data Management Data Types & Collections	Foundation	2009-08-06 Minor Change
集合编程主题 Collections Programming Topics Explains how to group objects in arrays, sets, or dictionaries in Cocoa. Last change: Added information about index sets, index paths, hash tables, and map tables.	Guides	Data Management Data Types & Collections	Foundation	2010-09-01 Content Update
属性列表编程指南 Property List Programming Guide Explains how to use structured, textual representations of data in Cocoa. Last change: Update example code to new initializer pattern.	Guides	Data Management Data Types & Collections	Foundation	2010-03-24 Minor Change
Property List Programming Topics for Core Foundation Explains how to use structured, textual representations of data in Core Foundation. Last change: Consolidated articles about using numbers. Changed title from "Property Lists Programming Topics."	Guides	Data Management Data Types & Collections	Foundation	2006-02-07 Minor Change
日期和时间编程指南 Date and Time Programming Guide Explains how to manage Cocoa dates and times. Last change: Expanded Calendrical Calculations section. Added Historical Dates Section and Week-Based Year Section.	Guides	Data Management Dates, Times, & Numbers	Foundation	2011-06-06 Content Update
区域设置编程指南 Locales Programming Guide Explains how to use locales to retrieve, interpret, and display localized information in Core Foundation. Last change: Corrected link to example of ISO 3166-1 country codes.	Guides	Data Management Dates, Times, & Numbers	Foundation	2008-10-15 Minor Change
数字和值编程主题 Number and Value Programming Topics Explains how to use Cocoa object wrappers for primitive C data types. Last change: Updated for OS X v10.5.	Guides	Data Management Dates, Times, & Numbers	Foundation	2008-02-08 Minor Change
异常编程主题 Exception Programming Topics Explains how to raise and handle exceptions in Cocoa applications. Last change: Removed misleading sentence from "Exceptions and the Cocoa Frameworks."	Guides	Data Management Event Handling	Foundation	2010-02-24 Minor Change
键值编码编程指南 Key-Value Coding Programming Guide Conceptual information about how to access a Cocoa object's values using keys. Last change: Updated for OS X v10.8 to include new Objective-C features.	Guides	Data Management Event Handling	Foundation	2012-07-17 Minor Change
Key-Value Observing Programming Guide Explains the Cocoa key-value observing protocol. Last change: Updated to use new Objective-C features.	Guides	Data Management Event Handling	Foundation	2012-07-17 Minor Change
通知编程主题 Notification Programming Topics Explains how to send and receive information about events in Cocoa programs. Last change: Added links to key Cocoa definitions.	Guides	Data Management Event Handling	Foundation	2009-08-18 Minor Change
定时器编程主题 Timer Programming Topics Explains how to use timers for scheduling automatic, repeating message invocations in Cocoa. Last change: Corrected minor typographical errors.	Guides	Data Management Event Handling	Foundation	2009-07-14 Minor Change
归档和序列化编程指南 Archives and Serializations Programming Guide Explains how to put Cocoa objects into and remove them from a representation suitable for archiving. Last change: Removed legacy information about non-keyed archiving.	Guides	Data Management File Management	Foundation	2012-07-17 Minor Change
包编程指南 Bundle Programming Guide Explains how to use bundle objects to organize resources. Last change: Changed references of iOS to iOS.	Guides	Data Management File Management	Foundation	2010-07-08 Minor Change
资源编程指南 Resource Programming Guide Explains how to work with nib and bundle resources in apps. Last change: Modified discussion of high-resolution image resources to include all Retina displays.	Guides	Data Management File Management	Foundation	2012-06-11 Minor Change
首选项和设置编程指南 Preferences and Settings Programming Guide Explains how to use the Cocoa defaults system to create and save user preferences. Last change: Updated the document to reflect new limits for key and value sizes.	Guides	Data Management Preference Settings	Foundation	2012-03-01 Minor Change
数据格式化指南 Data Formatting Guide Explains how to use Cocoa formatters to create and validate text in text fields and other cells. Last change: Updated links to TR35 for recent OS releases.	Guides	Data Management Strings, Text, & Fonts	Foundation	2012-09-19 Minor Change
Sort Descriptor Programming Topics Explains how to use sort descriptors to specify the sorting of collections. Last change: Updated to use modern Objective-C features.	Guides	Data Management Strings, Text, & Fonts	Foundation	2012-07-17 Minor Change
字符串编程指南 String Programming Guide Explains how to create, search, concatenate, and draw strings in Cocoa. Last change: Updated code snippets to adopt new Objective-C features.	Guides	Data Management Strings, Text, & Fonts	Foundation	2012-07-17 Minor Change
NSFileSecurity Class Reference Describes the NSFileSecurity class, an Objective-C stub class transparently bridged to CFFileSecurity that provides security information about a file. Last change: New document.	Reference	Security	Foundation	2011-05-13 First Version
NSURLConnectionDataDelegate Protocol Reference Describes a protocol for handling incoming data from and providing body data to an NSURLConnection request. Last change: Updated for OS X v10.8.	Reference	Networking & Internet	Foundation	2012-07-17 Content Update
NSURLConnectionDelegate Protocol Reference Describes the protocol adopted by the NSURLConnection delegate. Last change: Migrated some missing delegate methods from the NSURLConnection class and added links to the performDefaultHandlingForAuthenticationChallenge: and rejectProtectionSpaceAndContinueWithChallenge: methods.	Reference	Networking & Internet	Foundation	2012-05-14 Minor Change
NSURLConnectionDownloadDelegate Protocol Reference Describes a protocol for receiving downloaded assets. Last change: New document.	Reference	Networking & Internet	Foundation	2011-10-12 First Version
NSCachedURLResponse Class Reference Describes a cached response to a URL load request. Last change: Updated to reflect availability of on-disk caching in iOS 5.0.	Reference	Networking & Internet Protocol Streams	Foundation	2012-05-14 Minor Change
NSHTTPCookie Class Reference Describes an opaque set of data that represents state or configuration. Last change: Updated the discussions of the cookiesWithResponseHeaderFiles:forURL method, the NSHTTPCookieSecure key, and the NSHTTPCookiePath key.	Reference	Networking & Internet Protocol Streams	Foundation	2009-10-15 Minor Change
NSHTTPCookieStorage Class Reference Describes a collection of cookies shared across all applications. Last change: Clarified sharing behavior of session cookies.	Reference	Networking & Internet Protocol Streams	Foundation	2012-09-19 Minor Change
NSHTTPURLResponse Class Reference Describes a response to an HTTP request. Last change: First publication of this content as a separate document.	Reference	Networking & Internet Protocol Streams	Foundation	2006-05-23 Minor Change
NSMutableURLRequest Class Reference Describes a mutable request for a resource identified by a URL. Last change: Updated for OS X v10.8.	Reference	Networking & Internet Protocol Streams	Foundation	2012-07-17 Content Update
NSStream Class Reference Describes an interface for reading and writing data. Last change: Added network service type constants available in OS X v10.7 and later.	Reference	Networking & Internet Protocol Streams	Foundation	2010-12-17 Minor Change
NSStreamDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSStream objects. Last change: Made minor corrections to document metadata.	Reference	Networking & Internet Protocol Streams	Foundation	2012-03-14 Minor Change
NSURLAuthenticationChallenge Class Reference Describes a challenge from a server requiring authentication from the client. Last change: Clarified the proposed credential for an authentication challenge.	Reference	Networking & Internet Protocol Streams	Foundation	2010-04-06 Minor Change
NSURLAuthenticationChallengeSender Protocol Reference Describes the interface for receiving authentication challenges. Last change: Added the performDefaultHandlingForAuthenticationChallenge: and rejectProtectionSpaceAndContinueWithChallenge: methods.	Reference	Networking & Internet Protocol Streams	Foundation	2012-05-14 Minor Change
NSURLCache Class Reference Describes a collection of cached responses and data. Last change: Added cache location information specific to iOS.	Reference	Networking & Internet Protocol Streams	Foundation	2010-05-11 Minor Change
NSURLConnection Class Reference Describes a connection used to retrieve data. Last change: Updated for iOS v5.0.	Reference	Networking & Internet Protocol Streams	Foundation	2012-09-19 Content Update
NSURLCredential Class Reference Describes a credential used to authenticate a URL load request. Last change: Added API information for additional authentication methods.	Reference	Networking & Internet Protocol Streams	Foundation	2009-08-12 Minor Change
NSURLCredentialStorage Class Reference Describes a mapping of credentials to their corresponding protection spaces. Last change: Expanded description of defaultCredentialForProtectionSpace:.	Reference	Networking & Internet Protocol Streams	Foundation	2006-05-23 Minor Change
NSURLProtectionSpace Class Reference Describes an area on a server that requires authentication of URL load requests. Last change: Added a missing authentication scheme constant.	Reference	Networking & Internet Protocol Streams	Foundation	2011-05-03 Minor Change
NSURLProtocol Class Reference Describes the interface for protocol-specific loading of URL data. Last change: Clarified explanations throughout.	Reference	Networking & Internet Protocol Streams	Foundation	2011-05-04 Minor Change
NSURLProtocolClient Protocol Reference Describes the interface used by protocol objects to communicate with the URL loading system. Last change: Clarified wording.	Reference	Networking & Internet Protocol Streams	Foundation	2011-06-06 Minor Change
NSURLRequest Class Reference Describes a request for a resource identified by a URL. Last change: Updated for OS X v10.8.	Reference	Networking & Internet Protocol Streams	Foundation	2012-07-17 Content Update
NSURLResponse Class Reference Describes the metadata returned by a server for a load request. Last change: Updated for OS X v10.8. Added new method.	Reference	Networking & Internet Protocol Streams	Foundation	2012-09-19 Minor Change
NSNetService Class Reference Describes a network service that an application publishes or uses as a client. Last change: Noted that a timeout value of 0.0 means to attempt resolution indefinitely.	Reference	Networking & Internet Services & Discovery	Foundation	2011-01-04 Minor Change
NSNetServiceBrowser Class Reference Describes a query for published network services. Last change: Updated for iOS 4.0. Delegate methods moved to NSNetServiceBrowserDelegate Protocol Reference.	Reference	Networking & Internet Services & Discovery	Foundation	2010-04-06 Content Update
NSNetServiceBrowserDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSNetServiceBrowser objects. Last change: New document that describes the protocol that defines the methods for delegates of NSNetServiceBrowser objects.	Reference	Networking & Internet Services & Discovery	Foundation	2010-03-22 Content Update
NSNetServiceDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSNetService objects. Last change: New document that describes the protocol that defines the methods for delegates of NSNetService objects.	Reference	Networking & Internet Services & Discovery	Foundation	2010-03-22 Content Update
NSInputStream Class Reference Describes a read-only data stream. Last change: Corrected description of return value from read:maxLength:.	Reference	Networking & Internet Sockets & TCP	Foundation	2010-07-12 Minor Change
NSMachPortDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSMachPort objects. Last change: Updated for iOS 4.0.	Reference	Networking & Internet Sockets & TCP	Foundation	2010-04-23 Content Update
NSOutputStream Class Reference Describes a write-only data stream. Last change: Updated for OS X v 10.6. Added initWithURL:append: and outputStreamWithURL:append: methods.	Reference	Networking & Internet Sockets & TCP	Foundation	2009-09-01 Minor Change
NSPortDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSPort objects. Last change: Updated for iOS 4.0.	Reference	Networking & Internet Sockets & TCP	Foundation	2010-04-23 Content Update
Objective-C 运行时参考手册 Objective-C Runtime Reference Describes the data structures and functions of the Objective-C runtime support library. Last change: Removed obsolete functions marg-related API (such as marg_setValue).	Reference	Languages & Utilities Objective-C	Foundation	2010-06-17 Minor Change
NSComparisonPredicate Class Reference Describes a predicate used to compare the results of two expressions. Last change: Updated typedefs.	Reference	Data Management	Foundation	2011-05-14 Content Update
NSCompoundPredicate Class Reference Describes a representation of logical gate and comparison operations. Last change: Noted change in behavior in initialization (copies rather than retains predicates array).	Reference	Data Management	Foundation	2009-10-14 Minor Change
NSExpression Class Reference Describes a predicate expression. Last change: Added additional initializers.	Reference	Data Management	Foundation	2012-05-14 Minor Change
NSFileVersion Class Reference Describes a document revision. Last change: New document.	Reference	Data Management	Foundation	2011-10-12 First Version
NSJSONSerialization Class Reference Describes a class for converting JSON to Foundation objects and converting Foundation objects to JSON. Last change: First version for iOS v5.0.	Reference	Data Management	Foundation	2011-10-12 Content Update
NSLinguisticTagger Class Reference Describes and tags natural speech as nouns, verbs, adjectives, etc. Last change: New document that describes and tags natural speech as nouns, verbs, adjectives, etc.	Reference	Data Management	Foundation	2011-10-12 Content Update
NSPredicate Class Reference Describes a representation of logical conditions. Last change: Noted limitations of the predicateFormat method.	Reference	Data Management	Foundation	2009-10-09 Minor Change
NSSecureCoding Protocol Reference Describes the NSSecureCoding protocol, which is adopted by classes that can securely encode and decode themselves. Last change: New document.	Reference	Data Management	Foundation	2012-07-23 First Version
NSURL Class Reference Describes a string that uniquely identifies a resource. Last change: Updated for OS X v10.8.	Reference	Data Management	Foundation	2012-09-19 Minor Change
NSUbiquitousKeyValueStore Class Reference Describes the setting of key/value data in the cloud. Last change: Added a description for the NSUbiquitousKeyValueStoreAccountChange store-change-reason key.	Reference	Data Management	Foundation	2012-07-20 Minor Change
NSUndoManager Class Reference Describes a general-purpose recorder of undo and redo operations. Last change: Added NSUndoManagerGroupIsDiscardableKey constant.	Reference	Data Management	Foundation	2012-06-11 Minor Change
NSValueTransformer Class Reference Describes a Cocoa-bindings compatible interface for transforming value representations. Last change: Updated for iOS 3.0.	Reference	Data Management	Foundation	2009-03-05 Content Update
NSXMLParser Class Reference Describes an object for finding and extracting data in XML documents. Last change: Added initWithStream: method.	Reference	Data Management	Foundation	2011-06-06 Content Update
NSXMLParserDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSXMLParser objects. Last change: Updated for iOS 4.0.	Reference	Data Management	Foundation	2010-04-23 Content Update
NSArray Class Reference Describes an immutable ordered collection. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSCountedSet Class Reference Describes an unordered collection of possibly identical elements. Last change: Updated the introduction and made minor corrections throughout.	Reference	Data Management Data Types & Collections	Foundation	2010-08-16 Minor Change
NSData Class Reference Describes an immutable byte buffer. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSDictionary Class Reference Describes an immutable collection of key-value pairs. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSEnumerator Class Reference Describes a facility for sequentially returning the elements of a collection. Last change: Revised task heading.	Reference	Data Management Data Types & Collections	Foundation	2007-02-23 Minor Change
NSHashTable Class Reference Describes a mutable unordered collection of distinct elements that may use weak references. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSIndexPath Class Reference Describes a path to a node in a tree. Last change: Added warning to indexAtPosition: method about accessing past the end of the collection.	Reference	Data Management Data Types & Collections	Foundation	2011-03-08 Minor Change
NSIndexSet Class Reference Describes an immutable collection of unique unsigned integers. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSLocale Class Reference Describes a locale. Last change: Updated for OS X v 10.6. Added new calendar identifiers. Added methods to determine character and line direction by ISO language code.	Reference	Data Management Data Types & Collections	Foundation	2009-08-28 Minor Change
NSMapTable Class Reference Describes a collection of key-value pairs that supports weak references. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSMethodSignature Class Reference Describes the types of a method's parameters and return value. Last change: Added declaration of signatureWithObjCTypes:.	Reference	Data Management Data Types & Collections	Foundation	2008-10-15 Minor Change
NSMutableArray Class Reference Describes a mutable ordered collection. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSMutableData Class Reference Describes a mutable byte buffer. Last change: Corrected minor typographical errors.	Reference	Data Management Data Types & Collections	Foundation	2007-03-26 Minor Change
NSMutableDictionary Class Reference Describes a changeable collection of values that are identified by keys. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSMutableIndexSet Class Reference Describes a mutable collection of unique unsigned integers. Last change: Clarified the description of shiftIndexesStartingAtIndex:by:.	Reference	Data Management Data Types & Collections	Foundation	2012-06-11 Minor Change
NSMutableOrderedSet Class Reference Describes a mutable ordered set of distinct objects. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSMutableSet Class Reference Describes a mutable unordered collection of distinct elements. Last change: Updated the introduction and made minor changes throughout.	Reference	Data Management Data Types & Collections	Foundation	2010-08-17 Minor Change
NSNull Class Reference Describes an object that represents null. Last change: First publication of this content as a separate document.	Reference	Data Management Data Types & Collections	Foundation	2006-05-23 Minor Change
NSObject Class Reference Describes the Cocoa root class. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSObject Protocol Reference Describes the interface used to define basic object behavior. Last change: Added debugDescription.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSOrderedSet Class Reference Describes an ordered set of distinct objects. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 Content Update
NSPointerArray Class Reference Describes an ordered collection of pointers. Last change: Updated for OS X v10.8.	Reference	Data Management Data Types & Collections	Foundation	2012-07-23 Content Update
NSPointerFunctions Class Reference Describes callout functions for managing a pointer reference held somewhere else. Last change: Updated NSPointerFunctionsOptions definitions.	Reference	Data Management Data Types & Collections	Foundation	2012-09-19 Minor Change
NSPropertyListSerialization Class Reference Describes an object that converts property list objects to and from serialized representations. Last change: Corrected discussion of the options parameter in propertyListWithData:options:format:error:.	Reference	Data Management Data Types & Collections	Foundation	2010-09-08 Minor Change
NSSet Class Reference Describes an immutable unordered collection of distinct elements. Last change: Added description of removeObserver:forKeyPath:context: method.	Reference	Data Management Data Types & Collections	Foundation	2011-07-08 Content Update
NSSortDescriptor Class Reference Describes the rules for a sorting operation. Last change: Updated for Mac OX S v 10.6. Added methods for creating sort descriptors. Added methods supporting NSComparator.	Reference	Data Management Data Types & Collections	Foundation	2009-08-28 Minor Change
NSUUID Class Reference Document that describes the class for creating UUIDs. Last change: New document.	Reference	Data Management Data Types & Collections	Foundation	2012-07-17 First Version
NSValue Class Reference Describes a container for a single C or Objective-C data item. Last change: Corrected typographical errors.	Reference	Data Management Data Types & Collections	Foundation	2007-10-31 Minor Change
NSCalendar Class Reference Describes a calendar. Last change: Updated for OS X v10.7. Added new methods and constants.	Reference	Data Management Dates, Times, & Numbers	Foundation	2011-06-06 Content Update
NSDate Class Reference Describes a single point in time. Last change: Updated description of description method.	Reference	Data Management Dates, Times, & Numbers	Foundation	2011-04-05 Minor Change
NSDateComponents Class Reference Describes the components of a date. Last change: Updated for OS X v10.8. Added leapMonth methods.	Reference	Data Management Dates, Times, & Numbers	Foundation	2012-07-17 Content Update
NSDecimalNumber Class Reference Describes a decimal number. Last change: Updated the description of the compare: method.	Reference	Data Management Dates, Times, & Numbers	Foundation	2007-10-31 Minor Change
NSDecimalNumberBehaviors Protocol Reference Describes the interface for controlling the behavior of NSDecimalNumber objects. Last change: Updated optional status of protocol methods.	Reference	Data Management Dates, Times, & Numbers	Foundation	2009-11-12 Minor Change
NSDecimalNumberHandler Class Reference Describes an object that specifies decimal number rounding and error handling. Last change: Corrected "Conforms to" section to include NSCoding.	Reference	Data Management Dates, Times, & Numbers	Foundation	2007-04-30 Minor Change
NSNumber Class Reference Describes a number. Last change: Clarified the restricted return values that the (NSValue) objCType method returns.	Reference	Data Management Dates, Times, & Numbers	Foundation	2008-02-08 Minor Change
NSTimeZone Class Reference Describes a time zone. Last change: Added missing constants NSTimeZoneNameStyleGeneric and NSTimeZoneNameStyleShortGeneric.	Reference	Data Management Dates, Times, & Numbers	Foundation	2012-09-19 Minor Change
NSProcessInfo Class Reference Describes the current process. Last change: Added note that NSProcessInfo is thread-safe in OS X v10.7 and later.	Reference	Data Management Device Information	Foundation	2012-05-14 Minor Change
NSBlockOperation Class Reference Describes a task comprised of one or more blocks. Last change: Updated for iOS 4.0.	Reference	Data Management Event Handling	Foundation	2010-04-13 Content Update
NSCondition Class Reference Describes a pthread-style condition variable and associated mutex lock. Last change: Corrected availability information.	Reference	Data Management Event Handling	Foundation	2008-09-09 Minor Change
NSConditionLock Class Reference Describes an integer-based condition for use in thread locking. Last change: Updated for OS X v10.5.	Reference	Data Management Event Handling	Foundation	2007-01-15 Minor Change
NSInvocation Class Reference Describes an Objective-C message for use in store-and-forward operations. Last change: Removed obsolete NSObjCValueType.	Reference	Data Management Event Handling	Foundation	2009-07-04 Minor Change
NSInvocationOperation Class Reference Describes a nonconcurrent operation for executing a single encapsulated task. Last change: Added information about the return type of the selector used for the operation.	Reference	Data Management Event Handling	Foundation	2009-08-19 Minor Change
NSKeyValueObserving Protocol Reference Describes the interface for receiving notifications of changes to object properties. Last change: Updated for OS X v10.7. Added new removeObserver:forKeyPath:context: method.	Reference	Data Management Event Handling	Foundation	2011-06-06 Content Update
NSLock Class Reference Describes a mutex-based lock. Last change: Added a warning describing what happens when you unlock a lock that is not currently locked.	Reference	Data Management Event Handling	Foundation	2008-02-08 Minor Change
NSLocking Protocol Reference Describes the interface for supporting mutex and condition locks. Last change: Updated for OS X v10.5.	Reference	Data Management Event Handling	Foundation	2007-01-22 Minor Change
NSMachPort Class Reference Describes a port object that wraps an OS X local communication port. Last change: Updated for iOS 4.0.	Reference	Data Management Event Handling	Foundation	2010-04-13 Content Update
NSMessagePort Class Reference Describes an endpoint for distributed object connections or interprocess messaging. Last change: Added important note that this class is scheduled for future deprecation. Use NSMachPort or NSSocketPort instead.	Reference	Data Management Event Handling	Foundation	2009-08-20 Minor Change
NSNotification Class Reference Describes information to be broadcast to other objects through a notification center. Last change: Made editorial improvements.	Reference	Data Management Event Handling	Foundation	2007-04-02 Minor Change
NSNotificationCenter Class Reference Describes an object that synchronously broadcasts notifications. Last change: Clarified discussion of addObserverForName:object:queue:usingBlock:.	Reference	Data Management Event Handling	Foundation	2010-08-03 Minor Change
NSNotificationQueue Class Reference Describes an object that asynchronously broadcasts notifications. Last change: Update for OS X v10.5.	Reference	Data Management Event Handling	Foundation	2007-04-02 Minor Change
NSOperation Class Reference Describes an encapsulated, single-shot task. Last change: Updated the information about completion blocks to reflect that they should not be used to queue additional work related to your operation object's task.	Reference	Data Management Event Handling	Foundation	2012-01-09 Minor Change
NSOperationQueue Class Reference Describes an object that manages a set of prioritized operations. Last change: Corrected the explanation of how objects can be executed serially in an operation queue.	Reference	Data Management Event Handling	Foundation	2012-01-09 Minor Change
NSPort Class Reference Describes the interface for implementing communication ports. Last change: Updated for iOS 4.0.	Reference	Data Management Event Handling	Foundation	2010-04-13 Content Update
NSRecursiveLock Class Reference Describes a lock that can be acquired multiple times by one thread without causing a deadlock. Last change: Updated for OS X v10.5.	Reference	Data Management Event Handling	Foundation	2007-04-30 Minor Change
NSRunLoop Class Reference Describes the object that manages events on a thread. Last change: Corrected overview explanation of creating NSRunloop instances.	Reference	Data Management Event Handling	Foundation	2009-12-05 Minor Change
NSThread Class Reference Describes a thread of execution. Last change: Added unit to setStackSize: and stackSize: methods (bytes).	Reference	Data Management Event Handling	Foundation	2010-02-18 Minor Change
NSTimer Class Reference Describes a timer. Last change: States that you cannot subclass NSTimer.	Reference	Data Management Event Handling	Foundation	2011-01-07 Minor Change
NSBundle Class Reference Describes a collection of resources used in a program. Last change: Added nil-parameter behavior information to pathForResource:ofType:. Removed references to releasing objects.	Reference	Data Management File Management	Foundation	2012-09-19 Minor Change
NSCoder Class Reference Describes the abstract class that provides the basis for archiving. Last change: Updated for OS X v10.8.	Reference	Data Management File Management	Foundation	2012-07-17 Content Update
NSCoding Protocol Reference Describes the interface for archiving. Last change: Corrected optional implementation status for encodeWithCoder:.	Reference	Data Management File Management	Foundation	2009-11-17 Minor Change
NSDirectoryEnumerator Class Reference Describes the facility for enumerating the contents of a directory. Last change: Updated for OS X v10.6.	Reference	Data Management File Management	Foundation	2009-05-28 Minor Change
NSFileCoordinator Class Reference Describes an object for coordinating file access. Last change: Added a description for the itemAtURL:willMoveToURL: method. Corrected the description of the addFilePresenter: class method.	Reference	Data Management File Management	Foundation	2012-07-17 Minor Change
NSFileHandle Class Reference Describes an object for accessing files or communication channels. Last change: Added descriptions for the readabilityHandler and writeabilityHandler properties.	Reference	Data Management File Management	Foundation	2011-07-26 Minor Change
NSFileManager Class Reference Describes an object that performs file-system operations. Last change: Updated for OS X v10.8 by adding descriptions of new iCloud APIs.	Reference	Data Management File Management	Foundation	2012-07-17 Minor Change
NSFileManagerDelegate Protocol Reference Describes the delegate methods for NSFileManager. Last change: First version of the document for iOS.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSFilePresenter Protocol Reference Describes the methods for managing the presentation of files. Last change: Added a description for the primaryPresentedItemURL property.	Reference	Data Management File Management	Foundation	2012-07-17 Content Update
NSFileWrapper Class Reference Describes a representation of a file-system node. Last change: Added class to Foundation framework in iOS 4.0.	Reference	Data Management File Management	Foundation	2010-05-11 Content Update
NSKeyedArchiver Class Reference Describes the facility for encoding objects and scalar values identified by keys. Last change: Updated for iOS 4.0.	Reference	Data Management File Management	Foundation	2010-04-13 Content Update
NSKeyedArchiverDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSKeyedArchiver objects. Last change: Updated for iOS 4.0.	Reference	Data Management File Management	Foundation	2010-04-23 Content Update
NSKeyedUnarchiver Class Reference Describes an object that extracts the contents of an archive created by the NSKeyedArchiver class. Last change: Updated for iOS 4.0.	Reference	Data Management File Management	Foundation	2010-04-13 Content Update
NSKeyedUnarchiverDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSKeyedUnarchiver objects. Last change: Updated for iOS 4.0. Corrected unarchiver:didDecodeObject: return value information.	Reference	Data Management File Management	Foundation	2010-05-30 Content Update
NSMetadataItem Class Reference Describes the metadata of a file. Last change: Metadata items are now supported in iOS 5.0.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSMetadataQuery Class Reference Describes a Spotlight query for file metadata. Last change: Metadata queries are now supported in iOS 5.0.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSMetadataQueryAttributeValueTuple Class Reference Describes metadata query results. Last change: Metadata attributes are now supported in iOS 5.0.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSMetadataQueryDelegate Protocol Reference Describes the protocol that defines the methods for delegates of NSMetadataQuery objects. Last change: This protocol is now supported in iOS 5.0.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSMetadataQueryResultGroup Class Reference Describes a group of metadata query result objects. Last change: Metadata results are now supported in iOS 5.0.	Reference	Data Management File Management	Foundation	2011-10-12 Minor Change
NSPipe Class Reference Describes a communications channel between processes. Last change: Updated for OS X v10.5.	Reference	Data Management File Management	Foundation	2007-01-26 Minor Change
NSUserDefaults Class Reference Describes an object for managing preference information. Last change: Updated with App Sandbox tweaks.	Reference	Data Management Preference Settings	Foundation	2012-01-09 Minor Change
NSAttributedString Class Reference Describes a character string with attributes. Last change: Updated to reflect enhanced support for attributed strings in iOS 6.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-09-19 Content Update
NSByteCountFormatter Class Reference Document that defines a formatter for file and memory size. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-07-23 First Version
NSCharacterSet Class Reference Describes a set of Unicode characters used in scanning and searching operations. Last change: Corrected typographical error.	Reference	Data Management Strings, Text, & Fonts	Foundation	2008-10-15 Minor Change
NSDataDetector Class Reference Matches strings defined by data detectors. Last change: New document for matching strings defined by data detectors.	Reference	Data Management Strings, Text, & Fonts	Foundation	2010-05-20 Minor Change
NSDateFormatter Class Reference Describes a date formatter. Last change: Added guidance that NSDateFormatter is not thread safe.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-09-19 Minor Change
NSFormatter Class Reference Describes the interface for formatter objects. Last change: Updated for Mac OS v10.6.	Reference	Data Management Strings, Text, & Fonts	Foundation	2009-08-06 Minor Change
NSMutableAttributedString Class Reference Describes a mutable character string with attributes. Last change: Added this class to the Foundation framework in iOS 3.2.	Reference	Data Management Strings, Text, & Fonts	Foundation	2010-02-25 Content Update
NSMutableCharacterSet Class Reference Describes a mutable set of characters. Last change: First publication of this content as a separate document.	Reference	Data Management Strings, Text, & Fonts	Foundation	2006-05-23 Minor Change
NSMutableString Class Reference Describes a mutable character string. Last change: Updated for OS X v10.5.	Reference	Data Management Strings, Text, & Fonts	Foundation	2007-03-06 Minor Change
NSNumberFormatter Class Reference Describes a number formatter. Last change: Added guidance that NSNumberFormatter is not thread safe.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-09-19 Minor Change
NSOrthography Class Reference Describes the linguistic content of a piece of text, especially for the purposes of spelling and grammar. Last change: Updated for iOS 4.0.	Reference	Data Management Strings, Text, & Fonts	Foundation	2010-04-13 Content Update
NSRegularExpression Class Reference Describes the regular expression class for string matching. Last change: New document describing the regular expression class for string matching.	Reference	Data Management Strings, Text, & Fonts	Foundation	2010-05-20 Minor Change
NSScanner Class Reference Describes an object that scans values from a string. Last change: Corrected description of scanHexLongLong:.	Reference	Data Management Strings, Text, & Fonts	Foundation	2011-01-21 Minor Change
NSString Class Reference Describes an immutable character string. Last change: Updated for OS X v10.8.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-07-17 Content Update
NSTextCheckingResult Class Reference Describes items located by text checking. Last change: Corrected typos.	Reference	Data Management Strings, Text, & Fonts	Foundation	2012-06-11 Minor Change
NSKeyValueCoding Protocol Reference Describes the interface for accessing object properties indirectly by key name or key path. Last change: Updated for OS X v10.7.	Reference	General	Foundation	2011-06-06 Content Update
Foundation Constants Reference Describes constants in the Foundation framework. Last change: Added NSFeatureUnsupportedError error as well as the XPC suite of errors.	Reference		Foundation	2012-09-19 Minor Change
Foundation Data Types Reference Describes the common data types in the Foundation framework. Last change: Updated for OS X v 10.8.	Reference		Foundation	2012-07-17 Minor Change
Foundation Framework Reference Describes the API used to define basic object types and behavior and ensure their consistency within a program. Last change: Updated for OS X v10.8.	Reference		Foundation	2012-07-17 Content Update
Foundation Functions Reference Describes Foundation framework functions. Last change: Added the Core Foundation bridging functions for ARC.	Reference		Foundation	2012-09-19 Minor Change
NSAssertionHandler Class Reference Describes the facility for handling false assertions. Last change: Updated for OS X v 10.6. Added NSAssertHandlerKey string.	Reference		Foundation	2009-08-28 Minor Change
NSAutoreleasePool Class Reference Describes the interface to the deferred-release mechanism in Cocoa's reference-counted memory management system. Last change: Updated for iOS 5 and ARC.	Reference		Foundation	2011-10-12 Content Update
NSCache Class Reference Describes an interface for caching objects. Last change: Noted that NSCache does not copy its keys.	Reference		Foundation	2010-11-15 Minor Change
NSCacheDelegate Protocol Reference First version of a document describing the NSCacheDelegate protocol. Last change: Updated for iOS 4.0.	Reference		Foundation	2010-04-13 Content Update
NSCopying Protocol Reference Describes the interface for providing immutable duplicates of objects. Last change: First publication of this content as a separate document.	Reference		Foundation	2006-05-23 Minor Change
NSDiscardableContent Protocol Reference First version of a document describing the NSDiscardableContent protocol. Last change: Updated for iOS 4.0.	Reference		Foundation	2010-04-13 Content Update
NSError Class Reference Describes a representation of a runtime error. Last change: Added deprecation information and new errors.	Reference		Foundation	2009-09-01 Minor Change
NSErrorRecoveryAttempting Protocol Reference Describes the interface for attempting recovery from runtime errors. Last change: Updated optional status of protocol methods.	Reference		Foundation	2009-11-12 Minor Change
NSException Class Reference Describes an exceptional condition. Last change: Updated for OS X v 10.6. Added callStackSymbols method.	Reference		Foundation	2009-08-28 Minor Change
NSFastEnumeration Protocol Reference Describes the interface for supporting the Objective-C 2.0 fast-enumeration feature. Last change: New document.	Reference		Foundation	2007-06-27 First Version
NSMutableCopying Protocol Reference Describes the interface for providing mutable duplicates of objects. Last change: First publication of this content as a separate document.	Reference		Foundation	2006-05-23 Minor Change
NSProxy Class Reference Describes the interface for object surrogates used in distributed messages and lazy instantiation. Last change: Added debugDescription method.	Reference		Foundation	2012-09-19 Minor Change
NSPurgeableData Class Reference First version of a document describing the interface for creating and storing a type of specialized data. Last change: Updated for iOS 4.0.	Reference		Foundation	2010-04-13 Content Update
Foundation Release Notes Describes new features, notes, and known issues for the Foundation framework in OS X v10.6. Last change: Updated to reflect support for iOS 4.0.	Release Notes		Foundation	2010-06-02 Minor Change
Foundation Release Notes for iOS Describes new features, notes, and known issues for the Foundation framework in iOS5. Last change: New document.	Release Notes		Foundation	2012-02-16 First Version
XMLPerformance Performance and parsing XML, focusing on speed, memory footprint, and user experience. Last change: Updated for iOS 4.0	Sample Code	Performance	Foundation	2010-07-08 Minor Change
AdvancedURLConnections Demonstrates various advanced networking techniques with NSURLConnection. Last change: A small update to add NTLM authentication support and to fix various minor issues.	Sample Code	Networking & Internet Protocol Streams	Foundation	2011-01-26 Content Update
SimpleFTPSample Demonstrates simple FTP operations using the NSURLConnection and CFFTPStream APIs. Last change: Updated to adopt the latest tools and techniques (most notably, ARC).	Sample Code	Networking & Internet Protocol Streams	Foundation	2012-08-19 Content Update
SimpleURLConnections Demonstrates simple networking using the NSURLConnection API. Last change: Adopted the latest tools and techniques (most notably, ARC). Disabled the bound pair workaround that was necessary prior to iOS 5.	Sample Code	Networking & Internet Protocol Streams	Foundation	2012-04-11 Content Update
BonjourWeb Shows how to find network services that are advertised by Bonjour. Last change: Updated to work with iOS SDK 4.0.	Sample Code	Networking & Internet Services & Discovery	Foundation	2010-06-16 Minor Change
WiTap The WiTap sample application demonstrates how to achieve network communication between applications. Last change: Updated for iOS 4.1, added IPv6 support, fixed problem causing delayed writes	Sample Code	Networking & Internet Services & Discovery	Foundation	2010-10-22 Content Update
ListAdder Demonstrates the technique of thread confinement using NSOperation. Last change: New document.	Sample Code	Data Management	Foundation	2010-08-27 First Version
FastEnumerationSample Demonstrates how to implement the NSFastEnumeration protocol. Last change: New document.	Sample Code		Foundation	2009-12-07 First Version
HTTPS Server Trust Evaluation TN2232: Describes how you can resolve HTTPS server trust evaluation, for example, to work with a server with a missing intermediate certificate. Last change: New document.	Technical Notes	Networking & Internet	Foundation	2012-10-10 First Version
Simple and Reliable Threading with NSOperation TN2109: Describes how Cocoa application developers can use NSOperation to solve many of the problems inherent in threaded code. Last change: New document.	Technical Notes	Data Management	Foundation	2010-08-27 First Version
Bonjour over Bluetooth on iOS 5.0 QA1753: Describes how Bonjour over Bluetooth has changed in iOS 5.0. Last change: Updated to reference the new DNSSDObjects sample code.	Technical Q&As	Networking & Internet	Foundation	2012-01-05 Minor Change
Concurrent NSOperations Failing On iOS 4 QA1712: Describes a common problem with concurrent, run loop based, NSOperations (such as those using NSURLConnection) on iOS 4. Last change: New document.	Technical Q&As	Networking & Internet	Foundation	2010-08-23 First Version
NSNetService and Automatic Reference Counting (ARC) QA1546: describes an issue with NSNetService that can cause connections never to complete. Last change: New document.	Technical Q&As	Networking & Internet	Foundation	2011-10-28 First Version
Resumable Downloads QA1761: Explains how to resume HTTP downloads. Last change: New document.	Technical Q&As	Networking & Internet	Foundation	2012-02-13 First Version
TLS Session Cache QA1727: describes how the TLS session cache affects HTTPS connections that need different TLS parameters. Last change: New document.	Technical Q&As	Networking & Internet	Foundation	2011-02-10 First Version
Using NSStreams For A TCP Connection Without NSHost QA1652: Describes how to create TCP NSStreams without NSHost (which is not supported on iOS). Last change: Fixed a typo (r. 11064426).	Technical Q&As	Networking & Internet Sockets & TCP	Foundation	2012-03-27 Minor Change
NSDateFormatter and Internet Dates QA1480: Explains how to use NSDateFormatter with fixed-format dates, like those in various Internet protocols. Last change: RFC 3339 dates are always in UTC, so set the time zone on the RFC 3339 date formatter to UTC.	Technical Q&As	Data Management Dates, Times, & Numbers	Foundation	2010-04-29 Minor Change
Why can't I save data to my application's bundle when running on the device? QA1662: Describes why you can't save data to your application's bundle when running on the device. Last change: New document.	Technical Q&As	Data Management Preference Settings	Foundation	2009-08-25 First Version
Converting to Precomposed Unicode QA1235: Describes how to convert a string to precomposed Unicode. Last change: Rewritten to focus on modern techniques.	Technical Q&As	Data Management Strings, Text, & Fonts	Foundation	2011-09-14 Content Update
WWDC 2012: Networking Best Practices Best practices to tune for performance and power from a TCP connection to using NSURLConnection. Last change: New document.	Video	Networking & Internet	Foundation	2012-09-19 First Version
WWDC 2012: Simplify Networking with Bonjour Network apps and services can use Bonjour to simplify your user experience. Last change: New document.	Video	Networking & Internet	Foundation	2012-09-19 First Version
WWDC 2012: Advanced iCloud Document Storage Write iCloud apps that don't use AppKit and UIKit's document classes. Last change: New document.	Video	Data Management	Foundation	2012-09-19 First Version
WWDC 2012: iCloud Storage Overview Development and debugging for iCloud and the Key-Value Store. Last change: New document.	Video	Data Management	Foundation	2012-09-19 First Version

3、用户交互界面开发组件及机制

用户界面开发包 （UIKit）：共277篇

使用 UIKit 框架构建和管理应用程序的用户界面。这个 Objective-C 框架提供了一个应用程序对象、事件驱动支持、绘图支持以及专为多点触控界面设计的窗口、视图和控件。

Construct and manage your application's user interface with the UIKit framework. This Objective-C framework provides an application object, event handling support, drawing support, windows, views, and controls designed specifically for the Multi-Touch interface.

Title	Resource Type	Topic	Framework	Date
Cocoa 自动布局指南 Cocoa Auto Layout Guide Describes the constraint-based system for laying out user interface elements. Last change: Added to iOS Library. Added links to WWDC videos.	Guides	User Experience	UIKit	2012-09-19 Content Update
iOS 易用性编程指南  Accessibility Programming Guide for iOS Describes how to make an iPhone application accessible to users with disabilities. Last change: Added missing return statement to code listing.	Guides	User Experience	UIKit	2012-02-16 Minor Change
iOS 表视图编程指南  Table View Programming Guide for iOS Describes how to create and manage table views for applications running iOS. Last change: Added new information for iOS 5.	Guides	User Experience Tables	UIKit	2012-09-19 Content Update
iOS 视图编程指南  View Programming Guide for iOS Describes the creation and management of visual interface elements. Last change: Reorganized and expanded the content of the document.	Guides	User Experience Windows & Views	UIKit	2011-03-08 Minor Change
iOS 视图控制器编程指南（遗留） View Controller Programming Guide for iOS (Legacy) This is an archived version for developers who need to support iOS 4.3 and earlier. Last change: New document.	Guides	User Experience Windows & Views	UIKit	2011-01-07 First Version
iOS 视图控制器编程指南  View Controller Programming Guide for iOS Explains how to use view controllers to implement radio, navigation, and modal interfaces. Last change: Added design guidelines for custom container view controllers and accessibility in the view controller. Updated the discussions of view rotation, view layout, and resource management for iOS 6.	Guides	User Experience Windows & Views	UIKit	2012-09-19 Content Update
iOS  视图控制器编录 View Controller Catalog for iOS Describes the container view controllers available in UIKit, and how to use them. Last change: Editorial corrections throughout.	Guides	User Experience Windows & Views	UIKit	2012-02-16 Minor Change
Scroll View Programming Guide for iOS Explains how to use scroll views to implement scrollable and zoomable user interfaces. Last change: Corrected the content size in Listing 1-2.	Guides	User Experience Windows & Views	UIKit	2011-06-06 Minor Change
iOS 多显示屏编程指南  Multiple Display Programming Guide for iOS Describes how to use window and screen objects in an iOS app. Last change: New document.	Guides	User Experience Windows & Views	UIKit	2012-09-19 First Version
iOS 集合视图编程指南  Collection View Programming Guide for iOS Describes the use of collection views in iOS apps. Last change: New document.	Guides	User Experience Windows & Views	UIKit	2012-09-19 First Version
本地和推送通知编程指南  Local and Push Notification Programming Guide Describes how explains how applications can send and receive push notifications locally and remotely. Last change: Added information about implementing push notifications on an OS X desktop client. Unified the guide for iOS and OS X.	Guides	Networking & Internet	UIKit	2011-08-09 Minor Change
iOS 绘图和打印指南  Drawing and Printing Guide for iOS Describes the APIs and techniques for drawing and printing on iOS. Last change: Revised wording throughout, fixed a number of technical errors, and updated the printing chapter for iOS 6.	Guides	Graphics & Animation 2D Drawing	UIKit	2012-09-19 Content Update
iOS 基于文档的应用编程指南  Document-Based App Programming Guide for iOS Describes how to create an iOS application whose documents are integrated with iCloud storage. Last change: Updated the document's iCloud-related information.	Guides	Data Management	UIKit	2012-09-19 Content Update
iOS 事件处理指南  Event Handling Guide for iOS Describes how applications can handle multitouch, motion, and other events. Last change: Made some minor corrections.	Guides	Data Management Event Handling	UIKit	2011-03-10 Minor Change
错误处理编程指南  Error Handling Programming Guide Describes NSError objects, related Application Kit support for error handling, and how to use these features in your code. Last change: Added advice about not modifying the error parameter if a method does not directly return NO to indicate an error (Creating and Returning NSError Objects).	Guides	Data Management Event Handling	UIKit	2011-01-07 Minor Change
iOS 文档交互编程主题  Document Interaction Programming Topics for iOS Explains how to provide item previews and how to register to open specific file types Last change: New document.	Guides	Data Management File Management	UIKit	2010-11-15 First Version
iOS 文本、网页以及编辑编程指南  Text, Web, and Editing Programming Guide for iOS Describes the technologies and techniques for displaying and managing text and web content in iOS. Last change: Updated information on pasteboard persistence and keyboard adjustment. Also made many small corrections.	Guides	Data Management Strings, Text, & Fonts	UIKit	2011-03-07 Minor Change
iOS  像机编程主题 Camera Programming Topics for iOS Explains how to perform still image and video capture, and how to pick items from the photo library. Last change: Corrected the information about presenting a media browser interface on iPad.	Guides	Audio & Video	UIKit	2012-07-17 Minor Change
UIViewControllerRestoration Protocol Reference Describes methods for restoring view controllers. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UISplitViewControllerDelegate Protocol Reference Describes methods for responding to split view controller changes. Last change: Added the splitViewController:shouldHideViewController:inOrientation: delegate method.	Reference	User Experience	UIKit	2011-10-12 Content Update
UIKit Framework Reference Describes the primary API for implementing the user interface in an iOS app. Last change: Added new classes introduced in iOS 6.	Reference	User Experience	UIKit	2012-09-19 Content Update
UIDataSourceModelAssociation Protocol Reference Describes methods for finding objects in collection views. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UIActivityViewController Class Reference Describes a view controller that presents the available app services to the user. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UIActivityItemSource Protocol Reference Describes the source of data provider objects for activities. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UIActivityItemProvider Class Reference Describes an object that provides app data for activities. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UIActivity Class Reference Describes a custom application service. Last change: New document.	Reference	User Experience	UIKit	2012-09-19 First Version
UIToolbar Class Reference Describes the class that implements a control for selecting one of many buttons, called toolbar items. Last change: Added symbols for iOS 6.0	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITextFieldDelegate Protocol Reference Describes the interface for receiving editing-related delegate messages in UITextField objects. Last change: New document.	Reference	User Experience Controls	UIKit	2008-06-16 First Version
UITextField Class Reference Describes a control for displaying and editing a single line of text. Last change: Added a new interfaces related to styled-text support in iOS 6.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITableViewDelegate Protocol Reference Describes the interface for dynamically altering the behavior and appearance of a table view. Last change: Added methods for managing header/footer views.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITableViewDataSource Protocol Reference Describes the interface for providing a table view with items to display. Last change: Corrected typo.	Reference	User Experience Controls	UIKit	2010-05-24 Minor Change
UITableViewController Class Reference Describes an object that manages a table view. Last change: Added a new property for accessing a refresh control.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITableViewCell Class Reference Describes a view that represents an item in a table view. Last change: Describes the multipleSelectionBackgroundView property added in iOS 5.0.	Reference	User Experience Controls	UIKit	2011-10-12 Minor Change
UITableView Class Reference Describes a view for displaying and editing lists of items. Last change: Added state preservation information and added new methods.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITabBarItem Class Reference Describes the class implementing items on tab bars, which allow one item to be selected at a time. Last change: Updated for iOS v5.0.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UITabBarDelegate Protocol Reference Describes the protocol for customizing a tab bar. Last change: New document.	Reference	User Experience Controls	UIKit	2008-05-16 First Version
UITabBarControllerDelegate Protocol Reference Describes the protocol for augmenting the behavior of a customized tab bar. Last change: Removed a sentence fragment in the tabBarController:didSelectViewController: method discussion.	Reference	User Experience Controls	UIKit	2009-07-17 Minor Change
UITabBarController Class Reference Describes the class that implements a controller managing all aspects of a radio interface in a tab bar. Last change: Added information about what state is saved during state preservation.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITabBar Class Reference Describes the class that implements a control for selecting one of many buttons, called items. Last change: Added symbols for iOS 6.0	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UISwitch Class Reference Describes a control that acts as an On/Off button. Last change: Added new methods introduced in iOS 6.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UIStepper Class Reference Describes a control for incrementing or decrementing a value. Last change: Added new methods introduced in iOS 6.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UISlider Class Reference Describes a control for selecting a value from a continuous range of values. Last change: Updated for iOS 5.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UISegmentedControl Class Reference Describes a horizontal button divided into multiple segments Last change: Updated for iOS v5.0.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UISearchDisplayDelegate Protocol Reference Describes the delegate methods for UISearchDisplayController objects. Last change: Removed incorrect notices that methods are required.	Reference	User Experience Controls	UIKit	2009-12-03 Minor Change
UISearchDisplayController Class Reference Describes a controller that manages display of a search interface. Last change: Updated for iOS v5.0.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UIPickerViewDelegate Protocol Reference Describes the interface for receiving requests for managing and configuring a picker view. Last change: Added a new method that supports returning styled text for picker items.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UIPickerViewDataSource Protocol Reference Describes the interface for receiving data requests from a picker view.	Reference	User Experience Controls	UIKit	2009-11-24 Minor Change
UIPickerView Class Reference Describes a view for selecting values by rotating wheels.	Reference	User Experience Controls	UIKit	2009-08-25 Minor Change
UIPageControl Class Reference Describes a control that allows users to move to the next or previous page. Last change: Added symbols for iOS 6.0	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UINavigationItem Class Reference Describes an item on a navigation bar. Last change: Added new methods and properties for setting and getting multiple left and right bar item objects.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UINavigationControllerDelegate Protocol Reference Describes the protocol used to implement a navigation controller delegate. Last change: Tagged the methods of this protocol as optional.	Reference	User Experience Controls	UIKit	2009-05-22 Minor Change
UINavigationController Class Reference Describes a view controller for navigating a hierarchy of views. Last change: Added information about what state is saved during state preservation.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UINavigationBarDelegate Protocol Reference Describes the protocol defining optional methods that a UINavigationBar delegate implements to update its views. Last change: New document.	Reference	User Experience Controls	UIKit	2008-03-12 First Version
UINavigationBar Class Reference Describes the class used to implement a control for navigating hierarchical content. Last change: Added symbols for iOS 6.0	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UIImagePickerControllerDelegate Protocol Reference Describes the interface for receiving images and movies picked by the user. Last change: Added descriptions for the UIImagePickerControllerReferenceURL and UIImagePickerControllerMediaMetadata constants.	Reference	User Experience Controls	UIKit	2010-08-19 Minor Change
UIImagePickerController Class Reference Describes a system object for choosing and taking pictures and movies. Last change: Additional improvements to the description of using an image picker on iPad.	Reference	User Experience Controls	UIKit	2012-07-17 Minor Change
UIDatePicker Class Reference Describes a control for selecting dates and times. Last change: Corrected the description for the calendar property.	Reference	User Experience Controls	UIKit	2010-11-29 Minor Change
UIControl Class Reference Describes the interface for views that respond to touches by sending action messages. Last change: Improved the description for the actionsForTarget:forControlEvent: instance method.	Reference	User Experience Controls	UIKit	2011-09-28 Minor Change
UIButton Class Reference Describes a control that responds to taps. Last change: Added a new interfaces related to styled-text support in iOS 6.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UIBarItem Class Reference Describes the abstract superclass for items in a tab bar or navigation bar. Last change: Updated for iOS v5.0.	Reference	User Experience Controls	UIKit	2011-10-12 Content Update
UIBarButtonItem Class Reference Describes a button in a toolbar or navigation bar. Last change: Added new methods introduced in iOS 6.	Reference	User Experience Controls	UIKit	2012-09-19 Content Update
UITableViewHeaderFooterView Class Reference Describes a header/footer view for a table view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UIRefreshControl Class Reference Describes a control for refreshing a table. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewUpdateItem Class Reference Describes the items to update during a collection view refresh. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewLayoutAttributes Class Reference Describes metrics used to lay out views in a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewLayout Class Reference Describes a class for specifying custom collection view layouts. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewFlowLayout Class Reference Describes a flow-based layout manager for a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewDelegateFlowLayout Protocol Reference Describes the methods a delegate must implement to manage a flow-based layout in a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewDelegate Protocol Reference Describes a collection view delegate. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewDataSource Protocol Reference Describes a collection view data source. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewController Class Reference Describes a view controller for managing a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionViewCell Class Reference Describes a view that provides custom content for a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionView Class Reference Describes a collection of views that displays content in a grid. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UICollectionReusableView Class Reference Describes a view that can be used to present content in a collection view. Last change: New document.	Reference	User Experience Tables	UIKit	2012-09-19 First Version
UIWindow Class Reference Describes the view that manages a window. Last change: Changed the companion guide to Multiple Display Programming Guide for iOS and clarified introductory content.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Minor Change
UIWebViewDelegate Protocol Reference Describes the interface for managing changes in a view displaying web content. Last change: Web view delegate methods may be called once per frame in the source document, not once per page.	Reference	User Experience Windows & Views	UIKit	2011-05-26 Minor Change
UIWebView Class Reference Describes a view for displaying web content. Last change: Added new methods introduced in iOS 6.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIViewController Class Reference Describes a responder that manages views. Last change: Added properties and methods related to state preservation and restoration. Added method to determine whether a segue should be executed.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIView Class Reference Describes the interface for interactive rectangular areas on the screen. Last change: Added methods and properties related to state preservation and restoration. Added methods related to autolayout. Fixed typo.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UITextViewDelegate Protocol Reference Describes the interface for receiving editing-related delegate messages in UITextView objects. Last change: Updated the textViewDidChange: method description to indicate when it is called.	Reference	User Experience Windows & Views	UIKit	2010-08-03 Minor Change
UITextView Class Reference Describes a view for displaying and editing multiple lines of text. Last change: Added a new interfaces related to styled-text support in iOS 6.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIStoryboardSegue Class Reference Describes a storyboard transition. Last change: New document.	Reference	User Experience Windows & Views	UIKit	2011-10-12 First Version
UIStoryboardPopoverSegue Class Reference Describes a popover-based transition. Last change: New document.	Reference	User Experience Windows & Views	UIKit	2011-10-12 First Version
UIStoryboard Class Reference Describes a storyboard resource file. Last change: New document.	Reference	User Experience Windows & Views	UIKit	2011-10-12 First Version
UISplitViewController Class Reference Describes a view controller that presents distinct left and right panes. Last change: Added information about what state is saved during state preservation.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UISearchBarDelegate Protocol Reference Describes the protocol for making a search bar control functional. Last change: Corrected minor formatting error.	Reference	User Experience Windows & Views	UIKit	2010-04-28 Minor Change
UISearchBar Class Reference Describes the class implementing a text field control for text-based searches. Last change: Added symbols for iOS 6.0	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIScrollViewDelegate Protocol Reference Describes the interface for receiving scroll and zoom messages. Last change: Updated for iOS 5.	Reference	User Experience Windows & Views	UIKit	2011-10-12 Content Update
UIScrollView Class Reference Describes a view for displaying content larger than its bounds. Last change: Added state preservation information for this class.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIProgressView Class Reference Describes a view that displays the progress of a task over time. Last change: Updated for iOS 5.	Reference	User Experience Windows & Views	UIKit	2011-10-12 Content Update
UIPageViewController Class Reference Describes a class for paging through view controllers. Last change: Added new scrolling transition style.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Minor Change
UILabel Class Reference Describes a control for displaying static text. Last change: Added a new interfaces related to styled-text support in iOS 6.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIImageView Class Reference Describes a control for displaying or animating images. Last change: Added state preservation information to the class.	Reference	User Experience Windows & Views	UIKit	2012-09-19 Content Update
UIAlertViewDelegate Protocol Reference Describes the UIAlertViewDelegate protocol. Last change: Updated for iOS 5.	Reference	User Experience Windows & Views	UIKit	2011-10-12 Content Update
UIAlertView Class Reference Describes a view for presenting an alert message. Last change: Updated for iOS 5.	Reference	User Experience Windows & Views	UIKit	2011-10-12 Content Update
UIActivityIndicatorView Class Reference Describes a view that displays indeterminate progress for a task. Last change: Added a property description for color, allowing you to set the color of the activity indicator.	Reference	User Experience Windows & Views	UIKit	2011-10-12 Content Update
UIActionSheetDelegate Protocol Reference Describes the UIActionSheetDelegate protocol. Last change: New document.	Reference	User Experience Windows & Views	UIKit	2008-05-29 First Version
UIActionSheet Class Reference Describes the class used to present a sheet to the user. Last change: Added guidance on what to do when an application displaying an action sheet moves to the background.	Reference	User Experience Windows & Views	UIKit	2010-05-14 Minor Change
CIImage UIKit Additions Reference Describes additions for manipulating Cocoa Touch images. Last change: New document.	Reference	Graphics & Animation	UIKit	2011-10-12 First Version
CIColor UIKit Additions Reference Describes additions to support UIKit color information. Last change: New document.	Reference	Graphics & Animation	UIKit	2011-10-12 First Version
UIViewPrintFormatter Class Reference Describes the class for formatting printing pages based on displayed view content. Last change: New document.	Reference	Graphics & Animation 2D Drawing	UIKit	2010-10-12 First Version
UISimpleTextPrintFormatter Class Reference Describes the class for formatting simple text in printed pages. Last change: New document.	Reference	Graphics & Animation 2D Drawing	UIKit	2010-10-12 First Version
UIMarkupTextPrintFormatter Class Reference Describes the class for formatting markup text such as HTML when printing pages. Last change: New document.	Reference	Graphics & Animation 2D Drawing	UIKit	2010-10-12 First Version
UIImage Class Reference Describes an immutable representation of an image for display. Last change: Added symbols introduced in iOS 6.	Reference	Graphics & Animation 2D Drawing	UIKit	2012-09-19 Content Update
UIColor Class Reference Describes a representation of color and opacity (alpha value). Last change: Updated for iOS 5.	Reference	Graphics & Animation 2D Drawing	UIKit	2011-10-12 Content Update
UIBezierPath Class Reference Describes a vector-based path consisting of line and curve segments. Last change: Added the bezierPathByReversingPath method.	Reference	Graphics & Animation 2D Drawing	UIKit	2012-09-19 Content Update
NSValue UIKit Additions Reference Describes additions to support geometry conversions in UIKit. Last change: Updated for iOS v5.0.	Reference	Graphics & Animation 2D Drawing	UIKit	2011-10-12 Content Update
NSString UIKit Additions Reference Describes additions to support character string drawing in UIKit. Last change: Updated the constants to reflect changes in iOS 6.0.	Reference	Graphics & Animation 2D Drawing	UIKit	2012-09-19 Content Update
NSShadow Class Reference Describes a drop shadow for a drawing operation. Last change: This class is now supported in iOS.	Reference	Graphics & Animation 2D Drawing	UIKit	2012-09-19 Content Update
NSCoder UIKit Additions Reference Describes additions for archiving data types used in UIKit. Last change: Updated for iOS v5.0.	Reference	Graphics & Animation 2D Drawing	UIKit	2011-10-12 Content Update
UIPasteboard Class Reference Describes the class or transferring data within and between applications. Last change: Clarified description of pasteboard persistence and made other corrections.	Reference	Data Management	UIKit	2010-08-03 Minor Change
UIManagedDocument Class Reference Describes a concrete subclass of UIDocument that integrates with Core Data. Last change: Noted that UIManagedDocument does not support additional content on iCloud.	Reference	Data Management	UIKit	2012-07-17 Minor Change
UILocalizedIndexedCollation Class Reference Describes the class that helps to organize data for table views with section indexes. Last change: Revised the description of currentCollation.	Reference	Data Management	UIKit	2011-01-05 Minor Change
UIDocument Class Reference Describes the base class for documents in Cocoa Touch. Last change: New document.	Reference	Data Management	UIKit	2011-10-12 First Version
NSIndexPath UIKit Additions Describes the additions to the NSIndexPath class in the UIKit framework. Last change: Added methods to support collection views.	Reference	Data Management Data Types & Collections	UIKit	2012-09-19 Content Update
UIScreenMode Class Reference Describes the attributes of a screen. Last change: New document.	Reference	Data Management Device Information	UIKit	2010-02-25 First Version
UIScreen Class Reference Describes the recommended frame rectangles for an application's window. Last change: Updated for iOS 5.	Reference	Data Management Device Information	UIKit	2011-10-12 Content Update
UIDevice Class Reference Describes a representation of a device. Last change: Updated with replacement properties for the uniqueIdentifier property.	Reference	Data Management Device Information	UIKit	2012-09-19 Minor Change
UIAccelerometerDelegate Protocol Reference Describes the interface for receiving acceleration-related data from the system. Last change: New document.	Reference	Data Management Device Information	UIKit	2008-05-27 First Version
UIAccelerometer Class Reference Describes the system object that provides acceleration data. Last change: New document.	Reference	Data Management Device Information	UIKit	2008-05-27 First Version
UIAcceleration Class Reference Describes a device acceleration event. Last change: Minor changes.	Reference	Data Management Device Information	UIKit	2010-04-16 Minor Change
UITouch Class Reference Describes a representation of a touch in the Multi-Touch event model. Last change: Updated link to conceptual documentation.	Reference	Data Management Event Handling	UIKit	2010-09-17 Minor Change
UITextInputTraits Protocol Reference Describes the interface for traits associated with keyboard input. Last change: Added a new constant for specifying a Twitter-specific keyboard.	Reference	Data Management Event Handling	UIKit	2011-10-12 Content Update
UITapGestureRecognizer Class Reference Describes the UIGestureRecognizer subclass that recognizes tap gestures. Last change: Revised the description of tap gestures as sending an action message for each state of the gesture recognizer.	Reference	Data Management Event Handling	UIKit	2011-01-05 Minor Change
UISwipeGestureRecognizer Class Reference Describes the UIGestureRecognizer subclass that recognizes swiping gestures. Last change: Corrected description direction property.	Reference	Data Management Event Handling	UIKit	2010-11-15 Minor Change
UIRotationGestureRecognizer Class Describes the UIGestureRecognizer subclass that recognizes rotation gestures. Last change: Updated the description for the rotation property.	Reference	Data Management Event Handling	UIKit	2012-09-19 Minor Change
UIResponderStandardEditActions Protocol Reference Describes the interface for handling editing commands. Last change: Added editing methods for styled text.	Reference	Data Management Event Handling	UIKit	2012-09-19 Content Update
UIResponder Class Reference Describes the interface for handling events. Last change: Added caveats about calling super for the touch-handling methods and for resignFirstResponder.	Reference	Data Management Event Handling	UIKit	2011-03-07 Minor Change
UIPinchGestureRecognizer Class Reference Describes the UIGestureRecognizer subclass that recognizes pinching gestures. Last change: Updated the description of the scale property.	Reference	Data Management Event Handling	UIKit	2012-09-19 Minor Change
UIPanGestureRecognizer Class Reference Describes the UIGestureRecognizer subclass that recognizes pan gestures. Last change: Added information about continuous gesture recognizer properties such as scale, rotation angle, and translation value.	Reference	Data Management Event Handling	UIKit	2012-09-19 Minor Change
UIMenuController Class Reference Describes the class used to present the menu interface. Last change: Describes the menuItems property and UIMenuControllerArrowDirection constants added in iOS 3.2.	Reference	Data Management Event Handling	UIKit	2010-02-25 Content Update
UILongPressGestureRecognizer Class Reference Describes the subclass of UIGestureRecognizer that recognizes long presses. Last change: Corrected the default value of the numberOfTapsRequired property.	Reference	Data Management Event Handling	UIKit	2010-12-03 Minor Change
UILocalNotification Class Reference Describes the class for sending local notifications on a device. Last change: New document.	Reference	Data Management Event Handling	UIKit	2010-05-24 First Version
UIGestureRecognizerDelegate Protocol Reference Describes the protocol adopted by the delegate of a gesture recognizer class. Last change: Corrected formatting error.	Reference	Data Management Event Handling	UIKit	2010-09-15 Minor Change
UIGestureRecognizer Class Reference Describes the abstract base class for gesture recognizers. Last change: Updated the addTarget:action: method description.	Reference	Data Management Event Handling	UIKit	2012-09-19 Minor Change
UIEvent Class Reference Describes the class whose instances represent multitouch, motion, and remote-control events. Last change: Augmented description of timestamp property.	Reference	Data Management Event Handling	UIKit	2010-08-03 Minor Change
UIApplicationDelegate Protocol Reference Describes the interface for receiving app life-cycle messages. Last change: Added methods related to state preservation and restoration.	Reference	Data Management Event Handling	UIKit	2012-09-19 Content Update
UIApplication Class Reference Describes the object representing an app. Last change: Added methods related to state preservation and restoration.	Reference	Data Management Event Handling	UIKit	2012-09-19 Content Update
UINib Class Reference Describes an object for unarchiving and instantiating a nib file. Last change: New document.	Reference	Data Management File Management	UIKit	2010-05-26 First Version
UIDocumentInteractionControllerDelegate Protocol Reference Describes the methods for working with a document interaction controller. Last change: Updated to describe printing capability in iOS 4.2.	Reference	Data Management File Management	UIKit	2010-11-15 Content Update
UIDocumentInteractionController Class Reference Describes a system object for interacting with file types not directly supported by your app. Last change: Corrected the description of the dismissMenuAnimated: instance method.	Reference	Data Management File Management	UIKit	2011-03-08 Minor Change
NSBundle UIKit Additions Reference Describes additions for loading nib files in iPhone applications. Last change: Minor clarifications.	Reference	Data Management File Management	UIKit	2010-03-26 Minor Change
UITextSelectionRect Class Reference Describes an annotated selection rectangle. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 First Version
UITextRange Class Reference Describes the base class used for objects that represent ranges in a text document. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UITextPosition Class Reference Describes the base class for objects that represent locations in a text document. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UITextInputTokenizer Protocol Reference Describes the interface to the text input system for evaluating units of text of varying granularity. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UITextInputStringTokenizer Class Reference Describes the class that provides a default implementation of the UITextInputTokenizer protocol. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UITextInputMode Class Reference Describes the class whose instances represent the current input mode. Last change: Added description of the activeInputModes class method.	Reference	Data Management Strings, Text, & Fonts	UIKit	2011-06-06 Minor Change
UITextInputDelegate Protocol Reference Describes the interface for notifying the text system of changes in text and selection. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UITextInput Protocol Reference Describes the interface for text-displaying objects that enables integration with the text input system. Last change: Added methods introduced in iOS 6.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 Content Update
UITextChecker Class Reference Describes the class used for spell-checking documents and proposing word completions. Last change: Made a minor correction.	Reference	Data Management Strings, Text, & Fonts	UIKit	2011-01-05 Minor Change
UIKeyInput Protocol Reference Describes the protocol adopted by classes to enable simple text entry. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-02-25 First Version
UIFont Class Reference Describes a representation of a font and the font system. Last change: Updated to include symbols introduced in iOS 4.0.	Reference	Data Management Strings, Text, & Fonts	UIKit	2010-05-11 Content Update
NSStringDrawingContext Class Reference Describes metrics used during string drawing. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 First Version
NSParagraphStyle Class Reference Describes an immutable paragraph style. Last change: The NSParagraphStyle class is now included in iOS 6.0.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 Content Update
NSMutableParagraphStyle Class Reference Describes a mutable paragraph style. Last change: The NSMutableParagraphStyle class is now included in iOS 6.0.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 Content Update
NSAttributedString UIKit Additions Reference Describes additions for drawing attributed strings. Last change: New document.	Reference	Data Management Strings, Text, & Fonts	UIKit	2012-09-19 First Version
UIInputViewAudioFeedback Protocol Reference Last change: New document.	Reference	Audio & Video Audio	UIKit	2010-10-27 First Version
UIVideoEditorControllerDelegate Protocol Reference Describes the interface for receiving the path to a movie edited by the user. Last change: New document.	Reference	Audio & Video Video	UIKit	2009-07-07 First Version
UIVideoEditorController Class Reference Describes a controller that presents and manages a simple movie editor. Last change: New document.	Reference	Audio & Video Video	UIKit	2009-08-02 First Version
UIScrollViewAccessibilityDelegate Protocol Reference Describes the protocol for getting accessibility information from a scroll view. Last change: New document.	Reference		UIKit	2012-09-19 First Version
UIReferenceLibraryViewController Class Reference View controller that provides definitions for terms. Last change: Clarified usage requirements.	Reference		UIKit	2012-01-10 Minor Change
UIPrintPaper Class Reference Describes the class for specifying paper size for printing. Last change: New document.	Reference		UIKit	2010-10-12 First Version
UIPrintPageRenderer Class Reference Describes the base class for objects that draw pages of printable content. Last change: New document.	Reference		UIKit	2010-10-12 First Version
UIPrintInteractionControllerDelegate Protocol Reference Describes the protocol implemented by the delegate to return paper size. Last change: New document.	Reference		UIKit	2010-11-15 First Version
UIPrintInteractionController Class Reference Describes the class used to manage the printing user interface. Last change: New document.	Reference		UIKit	2010-10-12 First Version
UIPrintInfo Class Reference Describes the class for capturing information about a print job—for example, output type and orientation. Last change: New document.	Reference		UIKit	2010-10-12 First Version
UIPrintFormatter Class Reference Describes the base class for objects that format the pages of a print job. Last change: New document.	Reference		UIKit	2010-10-12 First Version
UIPopoverControllerDelegate Protocol Reference Describes the methods for interacting with popovers. Last change: Provided a name for the task group.	Reference		UIKit	2011-08-10 Minor Change
UIPopoverController Class Reference Describes the interface for managing popovers. Last change: Added properties relating to setting a custom popover background view.	Reference		UIKit	2011-10-12 Minor Change
UIPopoverBackgroundView Class Reference Describes the customization view for a popover. Last change: Added new symbols for iOS 6.0	Reference		UIKit	2012-09-19 Content Update
UIPickerViewAccessibilityDelegate Protocol Reference Describes the protocol for getting accessibility information for individual components in a picker view. Last change: New document.	Reference		UIKit	2010-05-18 First Version
UIPageViewControllerDelegate Protocol Reference Describes the protocol used to respond to page view controller events. Last change: Added a new method.	Reference		UIKit	2012-09-19 Minor Change
UIPageViewControllerDataSource Protocol Reference Describes the protocol used to supply data to a page view controller. Last change: Added new methods to support scrolling transition style.	Reference		UIKit	2012-09-19 Minor Change
UIMenuItem Class Reference Describes the class for creating and configuring items of the editing menu. Last change: New document.	Reference		UIKit	2010-02-25 First Version
UIKit Function Reference Describes the functions of the UIKit framework. Last change: Added two text-related functions and two accessibility-related functions, introduced in iOS 6.	Reference		UIKit	2012-09-19 Content Update
UIKit Data Types Reference Describes the data types of the UIKit framework. Last change: Updated for iOS v5.0.	Reference		UIKit	2011-10-12 Content Update
UIKit Constants Reference Describes the constants of the UIKit framework. Last change: Updated for iOS v5.0.	Reference		UIKit	2011-10-12 Content Update
UIDictationPhrase Class Reference Describes the returned text, and alternative text interpretations, resulting from user dictation. Last change: New document.	Reference		UIKit	2012-03-01 First Version
UIAppearanceContainer Protocol Reference Describes the protocol a class must adopt to support appearance customization. Last change: New document.	Reference		UIKit	2011-10-12 First Version
UIAppearance Protocol Reference Describes the protocol used to retrieve class appearance proxy objects. Last change: New document.	Reference		UIKit	2011-10-12 First Version
UIAccessibilityReadingContent Protocol Reference Describes a UIAccessibility protocol that allows applications to enable a continuous reading experience for VoiceOver users. Last change: Add missing colons to method names in headings.	Reference		UIKit	2012-07-17 Minor Change
UIAccessibilityIdentification Protocol Reference Describes the accessibility protocol views can implement to allow them to be queried via automation interfaces. Last change: New document.	Reference		UIKit	2011-10-12 First Version
UIAccessibilityFocus Protocol Reference Describes a way to discern when an assistive technology, such as VoiceOver, has virtual focus on an element. Last change: New document.	Reference		UIKit	2010-05-18 First Version
UIAccessibilityElement Class Reference Describes the class that represents accessible user interface elements in an iPhone application. Last change: Made minor corrections.	Reference		UIKit	2010-05-18 Minor Change
UIAccessibilityContainer Protocol Reference Describes a way for container views to supply accessibility information to assistive applications. Last change: Made minor corrections.	Reference		UIKit	2010-05-18 Minor Change
UIAccessibilityAction Protocol Reference Describes a way for certain views, such as sliders, to make their adjustments accessible. Last change: Added the accessibilityPerformMagicTap method.	Reference		UIKit	2012-09-19 Content Update
UIAccessibility Protocol Reference Describes the interface for providing accessibility information about accessible user interface elements in an iPhone application. Last change: Updated for iOS 6 with new properties, notifications, and traits.	Reference		UIKit	2012-09-19 Content Update
NSObject UIKit Additions Reference Describes additions for supporting nib files in UIKit. Last change: New document.	Reference		UIKit	2008-03-26 First Version
Converting to Storyboards Release Notes Last change: New document.	Release Notes		UIKit	2011-10-12 First Version
UICatalog This sample is a catalog exhibiting many of the UI elements found in the iOS UIKit framework. Last change: Upgraded to support 5.0 SDK, UIStepper control added, tinting/background image support added where possible, added secure text entry for UIAlertView.	Sample Code	User Experience	UIKit	2011-10-12 Content Update
TransWeb Demonstrates how to implement UIWebView with a transparent background. Last change: Updated iTunesArtwork.	Sample Code	User Experience	UIKit	2010-06-25 Minor Change
TopPaid This sample demonstrates how to build a universal application capable of running on both the iPhone and iPad. Last change: Upgraded to support iOS 4.2 SDK.	Sample Code	User Experience	UIKit	2011-01-13 Content Update
PhotoScroller Demonstrates the use of embedded UIScrollViews and CATiledLayer to create a rich user experience for displaying and paginating photos. Last change: Updated to support Automatic Reference Counting (ARC), Storyboards; now using UIPageViewController for managing the photo pages.	Sample Code	User Experience	UIKit	2012-08-01 Content Update
PhotoPicker Demonstrates choosing images from the photo library, take a picture with the camera, and how to customize the camera. Last change: Upgraded to iOS 5.0 SDK, removed some compiler warnings.	Sample Code	User Experience	UIKit	2012-08-17 Content Update
PageControl Demonstrates how to display pages of data differently between the iPhone and iPad. Last change: Updated as a universal application for iPhone and iPad.	Sample Code	User Experience	UIKit	2010-10-18 Content Update
KeyboardAccessory Shows how to use a keyboard accessory view. Last change: viewDidUnload now releases IBOutlets, added localization support.	Sample Code	User Experience	UIKit	2010-04-19 Content Update
HelloWorld Demonstrates how to edit text with a keyboard and how to display the text in a label. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience	UIKit	2010-06-24 Content Update
AppPrefs Demonstrates how to display your app's preferences or settings in the "Settings" system application. Last change: Deployment target set to iPhone OS 3.2.	Sample Code	User Experience	UIKit	2010-06-29 Content Update
ToolbarSearch Shows how to use a search field in a toolbar and present a list of recent searches in a popover. Last change: Plugged up a memory leak, fixed bug in that the UIActionSheet no longer prematurely dismisses its parent popover, fixed bug in that the popover now properly hides/shows during rotation.	Sample Code	User Experience Controls	UIKit	2011-10-24 Content Update
StreetScroller Demonstrates how a UIScrollView subclass can scroll infinitely in the horizontal direction. Last change: Editorial changes.	Sample Code	User Experience Controls	UIKit	2011-08-10 Content Update
NavBar Demonstrates how to use UINavigationController and UIViewController classes as building blocks to your application's user interface. Last change: Upgraded Xcode project for iOS 5.0, removed all compiler warnings/errors.	Sample Code	User Experience Controls	UIKit	2012-02-07 Content Update
TouchCells Demonstrates how to implement trackable-settable UIControls embedded in a UITableView. Last change: Added CFBundleIconFiles in Info.plist.	Sample Code	User Experience Tables	UIKit	2010-06-29 Content Update
TableViewSuite Shows how to use UITableView through a progression of increasingly advanced applications. Last change: Upgraded project to build with the iOS 4 SDK, fixed NSTimeZoneWrapper parsing bug, replaced use of deprecated "addTimeInterval".	Sample Code	User Experience Tables	UIKit	2010-06-24 Content Update
TableSearch Demonstrates how to search contents of a UITableView using UISearchBar and UISearchDisplayController. Last change: Upgraded project to build with the iOS 4 SDK.	Sample Code	User Experience Tables	UIKit	2010-06-17 Content Update
TableMultiSelect Demonstrates how to use multiple selection of table cells in UITableView. Last change: Fixed bug where it didn't navigate, now using Automatic Reference Counting (ARC)	Sample Code	User Experience Tables	UIKit	2012-10-16 Content Update
Table View Animations and Gestures Shows how to use gesture recognizers and animated update blocks with a table view. Last change: Updated to use storyboards and ARC.	Sample Code	User Experience Tables	UIKit	2011-10-12 Content Update
SimpleDrillDown Illustrates a simple drill-down application using a UITableView and a storyboard. Last change: Corrected table view cell style to be Basic instead of Custom.	Sample Code	User Experience Tables	UIKit	2012-02-28 Minor Change
LazyTableImages Asynchronously downloads images for a UITableView so the UI is more responsive. Last change: Upgraded project to build with the iOS 5 SDK. Deployment target set to iOS 5. ParseOperation now uses blocks for its callbacks instead of delegation. Memory leak and bug fixes.	Sample Code	User Experience Tables	UIKit	2012-08-22 Content Update
HeaderFooter Demonstrates how to implement and customize UITableView's header and footer views. Last change: Added CFBundleIconFiles in Info.plist.	Sample Code	User Experience Tables	UIKit	2010-06-29 Content Update
DrillDownSave Demonstrates how to restore the user's current location in a drill-down list style user interface and restore that location when the app is relaunched. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience Tables	UIKit	2010-06-24 Content Update
DateCell Demonstrates formatted display of date objects in UITableViewCells and using UIDatePicker to edit those values. Last change: Upgraded project to build with the iOS 4 SDK.	Sample Code	User Experience Tables	UIKit	2010-06-17 Content Update
AdvancedTableViewCells AdvancedTableViewCells shows several methods for displaying complex content in UITableViewCells. Last change: Upgraded to support iOS 4.2 SDK, now using UINib class to help load and instantiate xib-based table view cells.	Sample Code	User Experience Tables	UIKit	2011-01-11 Content Update
Accessory Demonstrates how to implement a custom accessory view for your UITableView in the form of a checkmark button. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience Tables	UIKit	2010-06-23 Content Update
Tabster An eclectic-style application designed to show how to build a tab-bar based iPhone application. Last change: Shows how to use "customizableViewControllers" property, customizes the appearance of the tab bar.	Sample Code	User Experience Windows & Views	UIKit	2012-03-09 Content Update
ScrollViewSuite A series of examples that illustrate how to use UIScrollView. Last change: Updated 1_TapToZoom to use Interface Builder for UI objects. Removed TapDetectingImageView class since the sample no longer requires it.	Sample Code	User Experience Windows & Views	UIKit	2010-10-20 Content Update
Scrolling Demonstrates how to implement two different style UIScrollViews: single image, and multiple images. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience Windows & Views	UIKit	2010-06-23 Content Update
Popovers This sample demonstrates proper use of UIPopoverController in iOS. Last change: Upgraded for iOS 6.0, now using Automatic Reference Counting (ARC)	Sample Code	User Experience Windows & Views	UIKit	2012-11-01 Content Update
MultipleDetailViews Illustrates how to use a split view controller with multiple detail views and a multi-level navigation hierarchy. Last change: Demonstrates managing the presentation of multiple detail view controllers with a navigation hierarchy that includes multiple levels.	Sample Code	User Experience Windows & Views	UIKit	2012-09-18 Content Update
HeadsUpUI Demonstrates how to implement a headsUp or HUD-like user interface over the app's primary view controller. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience Windows & Views	UIKit	2010-06-24 Content Update
ExternalDisplay How to show content on an external display. Last change: New document.	Sample Code	User Experience Windows & Views	UIKit	2011-03-01 First Version
AlternateViews Demonstrates how to implement alternate or distinguishing view controllers for each particular device orientation. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	User Experience Windows & Views	UIKit	2010-06-23 Content Update
Recipes and Printing Custom drawn page content by intermixing custom drawing routines with content rendered by architecture-provided print formatters. Last change: Initial version.	Sample Code	Graphics & Animation	UIKit	2011-08-24 Content Update
Reflection This sample shows how to implement a "reflection" special effect on a given UIImageView. Last change: Upgraded for iOS 5.0, now using Automatic Reference Counting (ARC)	Sample Code	Graphics & Animation 2D Drawing	UIKit	2012-09-26 Content Update
PrintWebView Demonstrates how to print content contained within a web view. Last change: Remove dependency on iOS 4.2 SDK; now uses "current" SDK in Xcode. Updated to adopt Objective-C features and conventions including declaration of instance variables in @implementation block and use of private class extensions to declare properties.	Sample Code	Graphics & Animation 2D Drawing	UIKit	2012-06-04 Minor Change
PrintPhoto PrintPhoto demonstrates how to print photos in iOS 4.2 or later. Last change: Updated to reflect changes for iOS 5. Use the asset URL rather than the ALAsset itself as the item to print when doing direct submission. Add conditional code so that the screen image orientation is applied to the CGImage obtained from fullScreenImage only when running on iOS prior to iOS 5. In iOS 5.0 and later the orientation is already baked into the screen image provided from the asset.	Sample Code	Graphics & Animation 2D Drawing	UIKit	2011-10-12 Content Update
TheElements TheElements is a sample application that provides access to the data contained in the Periodic Table of the Elements. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	Data Management	UIKit	2010-06-23 Content Update
SeismicXML Demonstrates how to use NSXMLParser to parse XML documents. Last change: Now using NSOperation to perform the XML parsing.	Sample Code	Data Management	UIKit	2010-08-18 Content Update
WhichWayIsUp Tracks the orientation of the device. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	Data Management Device Information	UIKit	2010-06-24 Content Update
BatteryStatus Demonstrates the use of the battery status properties and notifications provided via the iOS SDK. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	Data Management Device Information	UIKit	2010-07-22 Content Update
AccelerometerGraph Demonstrates how to use the UIAccelerometer class and filter its results. Last change: Added CFBundleIconFiles in Info.plist.	Sample Code	Data Management Device Information	UIKit	2010-06-28 Content Update
Touches Demonstrates how to handle multiple touches. Last change: Updated project to support Automatic Reference Counting (ARC) and Storyboards.	Sample Code	Data Management Event Handling	UIKit	2012-07-17 Content Update
SimpleGestureRecognizers Shows how to use standard gesture recognizers. Last change: Updated for to use storyboards and ARC. The gesture recognizers are now created in the storyboard rather than programmatically. The animations use the new block-based API.	Sample Code	Data Management Event Handling	UIKit	2011-10-12 Content Update
LaunchMe Demonstrates how to register and service incoming requests of a new URL type. Last change: Upgraded project to build with the iOS 4.0 SDK.	Sample Code	Data Management Event Handling	UIKit	2010-06-24 Content Update
CopyPasteTile Demonstrates how to implement copy, cut, and paste in your application. Last change: Added CFBundleIconFiles in Info.plist.	Sample Code	Data Management Event Handling	UIKit	2010-06-28 Content Update
DocInteraction Demonstrates how to use UIDocumentInteractionController to obtain information about documents and how to preview them. Last change: Upgraded to support iOS 5.0 SDK, added QLPreviewControllerDelegate to DITableViewController.h.	Sample Code	Data Management File Management	UIKit	2012-02-13 Content Update
SimpleTextInput SimpleTextInput is a text-editing application that demonstrates customized text display and text input handling. Last change: New document.	Sample Code	Data Management Strings, Text, & Fonts	UIKit	2011-01-19 First Version
International Mountains This sample demonstrates ways to incorporate and manage localized data in an iPhone application. Last change: Updates to make project compatible with iOS 4.0 SDK	Sample Code	Data Management Strings, Text, & Fonts	UIKit	2010-06-17 Minor Change
Icons This sample demonstrates the proper use of application icons on iOS. Last change: New document.	Sample Code	General	UIKit	2010-10-22 First Version
Formulaic Demonstrates how to use the iPhone Accessibility API to make an iPhone application accessible. Last change: Updated project to build with the iOS 4.0 SDK	Sample Code	General	UIKit	2010-07-01 Minor Change
CollectionView-Simple Demonstrates how to use UICollectionView, a way to present ordered data to users in a grid-like fashion. Last change: New document.	Sample Code		UIKit	2012-09-24 First Version
Launching your Application in Landscape TN2244: Describes how to start your application in landscape orientation at launch time. Last change: New document.	Technical Notes	User Experience	UIKit	2009-06-29 First Version
Troubleshooting Push Notifications TN2265: describes steps developers can take to troubleshoot sending and receiving of push notifications. Last change: Update link to Entrust root certificate. Replace apsd logging configuration profile with a signed version.	Technical Notes	Networking & Internet	UIKit	2011-09-26 Minor Change
Why won't my UIViewController rotate with the device? QA1688: Describes situations that can prevent view controllers from rotating. Last change: Added the case of not calling super on -(id)init.	Technical Q&As	User Experience	UIKit	2010-07-06 Content Update
Supporting orientations for iPad apps QA1689: describes the recommended orientation support for iPad apps. Last change: Changed references of separate iPhone and iPad Human Interface Guidelines to point to the combined iOS guidelines.	Technical Q&As	User Experience	UIKit	2010-12-10 Minor Change
Handling Popover Controllers During Orientation Changes QA1694: Shows best practices for handling popover controllers during device orientation changes. Last change: Updated to reflect consolidated iPad/iPhone Human Interface Guidelines.	Technical Q&As	User Experience	UIKit	2010-12-10 Minor Change
App Icons on iPad and iPhone QA1686: explains how the icon files in an application bundle are used on iPad and iPhone. Last change: After iOS 4.3, order doesn't matter in the icon arrangement. Added links to related references.	Technical Q&As	User Experience	UIKit	2011-07-14 Minor Change
Why does UILocalizedIndexedCollation not give localized results? QA1739: provides a solution for a common problem when using UILocalizedIndexedCollation Last change: New document.	Technical Q&As	User Experience Tables	UIKit	2011-07-14 First Version
Why does my app launch to a black screen on iOS 4? QA1709: shows how to resolve a black screen on launch by making your main window the first responder and visible on launch. Last change: New document.	Technical Q&As	User Experience Windows & Views	UIKit	2010-07-28 First Version
Views incorrectly draw underneath the status bar QA1723: Describes the conditions that can cause views to draw underneath the status bar. Last change: New document.	Technical Q&As	User Experience Windows & Views	UIKit	2012-02-07 First Version
How to opt out of video mirroring QA1738: Describes how to opt out of video mirroring. Last change: New document.	Technical Q&As	User Experience Windows & Views	UIKit	2011-04-04 First Version
Detecting phone numbers and links in an iPhone application QA1495: Describes how to detect phone numbers and links in an iPhone application. Last change: New document.	Technical Q&As	User Experience Windows & Views	UIKit	2009-10-27 First Version
How do I take a screenshot of my app that contains both UIKit and Camera elements? QA1714: demonstrates how to take a screenshot in app that contains both UIKit and Camera elements. Last change: New document.	Technical Q&As	Graphics & Animation	UIKit	2010-09-09 First Version
Screen Capture in UIKit Applications QA1703: Demonstrates how to take a screenshot in an UIKit application Last change: Added links to other screenshot Q&A's. Pointed out that one needs to add the QuartzCore framework and include the QuartzCore header to use Core Animation APIs.	Technical Q&As	Graphics & Animation 2D Drawing	UIKit	2011-03-28 Minor Change
How do I get my application to show up in the "Open in..." menu on iOS for a specific document type? QA1587: Describes how to add document types to iOS applications so they can be opened from the Open in... menu. Last change: New document.	Technical Q&As	Data Management File Management	UIKit	2012-08-14 First Version
Using UIWebView to display select document types QA1630: Describes how you can use a UIWebView to display select document types in your application Last change: Updated for iPhone OS 3.0.	Technical Q&As		UIKit	2009-08-25 Minor Change
Accessing Image Metadata in iOS QA1622: Describes how to access image metadata using the UIImagePickerController and the Assets Library Framework. Last change: Discusses the new APIs available in iOS 4 to access the metadata of an image.	Technical Q&As		UIKit	2011-08-22 Content Update
WWDC 2012: The Evolution of View Controllers on iOS Explore view controllers by examining the problems they address, and where they're going next. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Saving and Restoring Application State on iOS Discover the new application state restoration feature in iOS 6. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Polishing Your Interface Rotations Best practices for getting maximum performance and smooth transitions between interface orientations. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Keyboard Input in iOS Leverage what's new in iOS to improve the onscreen keyboard and text editing experience. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: iPhoto for iOS: UI Progression and Animation Design See how the interface for iPhoto for iOS was brought to life through animation. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: iOS User Interface Design Avoid common UI pitfalls to create an intuitive and beautiful app. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Introduction to Auto Layout for iOS and OS X Covers the basic concepts, IB support, and API to get started using auto layout. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Introducing Collection Views Get started with collection views and the UICollectionViewFlowLayout class to organize data in layouts. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Enhancing User Experience with Scroll Views Present scrolling content in a page view controller, and enhance OpenGL games. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Debugging UIWebViews and Websites on iOS See how to connect the Web Inspector to iPhone or iPad to optimize web content. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Building Concurrent User Interfaces on iOS Use concurrency in UIKit to perform drawing and other common operations. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Building Advanced Gesture Recognizers Best practices for controlling gesture interactions in your apps to avoid common pitfalls. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Best Practices for Mastering Auto Layout Create sophisticated and dynamic layouts in OS X and iOS apps using auto layout. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Auto Layout by Example Build a wide range of interfaces using auto layout. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Advanced Collection Views and Building Custom Layouts Write customized layouts that push the boundaries of interfaces in your apps. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Advanced Appearance Customization on iOS Tips and tricks for customizing UIKit controls. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Adopting Storyboards in Your App Use Storyboards to go from concept to a fully functional iOS app. Last change: New document.	Video	User Experience	UIKit	2012-09-19 First Version
WWDC 2012: Accessibility for iOS Best practices for working with VoiceOver and how to integrate accessibility into your apps. Last change: New document.	Video	User Experience	UIKit	2012-10-17 First Version
WWDC 2012: AirPrint Covers AirPrint and best practices for adding printing to iOS apps. Last change: New document.	Video	Graphics & Animation	UIKit	2012-09-19 First Version
WWDC 2012: Using iCloud with UIDocument See how UIDocument can help your document-based app adopt iCloud Storage. Last change: New document.	Video	Data Management	UIKit	2012-09-19 First Version

• 资源类型 Resource Types
  • 起步 Getting Started
  • 参考 Reference
  • 示例代码 Sample Code
  • 技术问答集 Technical Q&As
  • Xcode 任务 Xcode Tasks
• 主题 Topics
  • 语言与工具 Languages & Utilities
  • Xcode集成开发环境 Xcode
  • 常规 General
  • 网络与互联网 Networking & Internet
  • 安全 Security      
  • 用户体验 User Experience
• 框架 Frameworks
  • Cocoa Touch 层 Cocoa Touch Layer
    • 地址簿用户界面 AddressBookUI
    • 事件提醒开发包用户界面 EventKitUI
    • 游戏用户界面 GameKit
    • 内嵌广告 iAd
    • 地图开发包 MapKit
    • 消息用户界面 MessageUI
    • 推特 Twitter
    • UIKit 用户界面开发包 UIKit
  • 媒体层 Media Layer
    • 资源库 AssetsLibrary
    • 音频工具箱 AudioToolbox
    • 音频单元 AudioUnit
    • AV基础框架 AVFoundation
    • 核心音频框架 CoreAudio
    • 核心图形框架 CoreGraphics
    • 核心图像框架 CoreImage
    • 核心MIDI框架 CoreMIDI
    • 核心文本框架 CoreText
    • 核心视频框架 CoreVideo
    • GL开发包 GLKit
    • ImageIO
    • 媒体播放器 MediaPlayer
    • OpenAL 音频框架 OpenAL
    • OpenGLES 三维框架 OpenGLES
    • QuartzCore 二维图形框架 QuartzCore
  • 核心服务层 Core Services Layer
    • 帐户框架 Accounts
    • 地址簿框架 AddressBook
    • 广告支持框架 AdSupport
    • 核心基础网络框架 CFNetwork
    • 核心数据框架 CoreData
    • 核心基础框架 CoreFoundation
    • 核心位置框架 CoreLocation
    • 核心媒体框架 CoreMedia
    • 核心影像框架 CoreMotion
    • 核心电话框架 CoreTelephony
    • 事件提醒开发包 EventKit
    • 基础框架 Foundation
    • 移动核心服务框架 MobileCoreServices
    • 报刊亭开发包 NewsstandKit
    • PassKit
    • QuickLook
    • 社交框架 Social
    • 应用商店框架 StoreKit
    • 系统配置框架 SystemConfiguration
    • UIAutomation
  • 核心操作系统层 Core OS Layer
    • Accelerate
    • 核心蓝牙框架 CoreBluetooth
    • 外设框架 ExternalAccessory
    • 安全框架 Security
    • 系统框架 System