到今天实现功能, 由iTunes导入文件的应用程序, 并在此文档进行编辑的应用。

就像我们平时经常使用 PDF阅读这样的事情, 们能够自己导入我们的电子书。

源代码下载:https://github.com/colin1994/iTunesTest.git

以下详细介绍下实现过程。

先看效果图。

图1. 未实现功能前, iTunes截图

图2. 实现功能后, iTunes截图

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图3. 实现功能后, 执行截图。

好了, 通过图片, 我们能够看到实现的效果。

功能包括: 同意通过iTunes导入文件。

能够查看沙盒下全部文件。

实现过程:

1。

在应用程序的Info.plist文件里加入UIFileSharingEnabled键，并将键值设置为YES。

2。详细代码:

ViewController.h

//

//  ViewController.h

//  iTunesTest

//

//  Created by Colin on 14-6-8.

//  Copyright (c) 2014年 icephone. All rights reserved.

//

#import <UIKit/UIKit.h>

//step1. 导入QuickLook库和头文件

#import <QuickLook/QuickLook.h>

//step2. 继承协议

@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate,QLPreviewControllerDataSource,QLPreviewControllerDelegate,UIDocumentInteractionControllerDelegate>

{

    //step3. 声明显示列表

    IBOutlet UITableView *readTable;

}

//setp4. 声明变量

//UIDocumentInteractionController : 一个文件交互控制器,提供应用程序管理与本地系统中的文件的用户交互的支持

//dirArray : 存储沙盒子里面的全部文件

@property(nonatomic,retain) NSMutableArray *dirArray;

@property (nonatomic, strong) UIDocumentInteractionController *docInteractionController;

@end

ViewController.m

//

//  ViewController.m

//  iTunesTest

//

//  Created by Colin on 14-6-8.

//  Copyright (c) 2014年 icephone. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize dirArray;

@synthesize docInteractionController;

- (void)viewDidLoad

{

    [super viewDidLoad];

    //step5. 保存一张图片到设备document目录中(为了測试方便)

    UIImage *image = [UIImage imageNamed:@"testPic.jpg"];

    NSData *jpgData = UIImageJPEGRepresentation(image, 0.8);

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory

    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"testPic.jpg"]; //Add the file name

    [jpgData writeToFile:filePath atomically:YES]; //Write the file

    //step5. 保存一份txt文件到设备document目录中(为了測试方便)

    char *saves = "Colin_csdn";

    NSData *data = [[NSData alloc] initWithBytes:saves length:10];

    filePath = [documentsPath stringByAppendingPathComponent:@"colin.txt"];

    [data writeToFile:filePath atomically:YES];

    //step6. 获取沙盒里全部文件

	NSFileManager *fileManager = [NSFileManager defaultManager];

	//在这里获取应用程序Documents目录里的文件及目录列表

	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

	NSString *documentDir = [documentPaths objectAtIndex:0];

	NSError *error = nil;

	NSArray *fileList = [[NSArray alloc] init];

	//fileList便是包括有该目录下全部文件的文件名称及目录名的数组

	fileList = [fileManager contentsOfDirectoryAtPath:documentDir error:&error];

	self.dirArray = [[NSMutableArray alloc] init];

	for (NSString *file in fileList)

	{

		[self.dirArray addObject:file];

	}

	//step6. 刷新列表, 显示数据

	[readTable reloadData];

}

//step7. 利用url路径打开UIDocumentInteractionController

- (void)setupDocumentControllerWithURL:(NSURL *)url

{

    if (self.docInteractionController == nil)

    {

        self.docInteractionController = [UIDocumentInteractionController interactionControllerWithURL:url];

        self.docInteractionController.delegate = self;

    }

    else

    {

        self.docInteractionController.URL = url;

    }

}

#pragma mark- 列表操作

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

	return 1;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

	static NSString *CellName = @"CellName";

	UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellName];

	if (cell == nil)

	{

		cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellName];

		cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

	}

	NSURL *fileURL= nil;

	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

	NSString *documentDir = [documentPaths objectAtIndex:0];

	NSString *path = [documentDir stringByAppendingPathComponent:[self.dirArray objectAtIndex:indexPath.row]];

	fileURL = [NSURL fileURLWithPath:path];

	[self setupDocumentControllerWithURL:fileURL];

	cell.textLabel.text = [self.dirArray objectAtIndex:indexPath.row];

	NSInteger iconCount = [self.docInteractionController.icons count];

    if (iconCount > 0)

    {

        cell.imageView.image = [self.docInteractionController.icons objectAtIndex:iconCount - 1];

    }

	return cell;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

	return [self.dirArray count];

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

	QLPreviewController *previewController = [[QLPreviewController alloc] init];

    previewController.dataSource = self;

    previewController.delegate = self;

    // start previewing the document at the current section index

    previewController.currentPreviewItemIndex = indexPath.row;

    [[self navigationController] pushViewController:previewController animated:YES];

    //	[self presentViewController:previewController animated:YES completion:nil];

}

#pragma mark - UIDocumentInteractionControllerDelegate

- (NSString *)applicationDocumentsDirectory

{

	return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

}

- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)interactionController

{

    return self;

}

#pragma mark - QLPreviewControllerDataSource

// Returns the number of items that the preview controller should preview

- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)previewController

{

	return 1;

}

- (void)previewControllerDidDismiss:(QLPreviewController *)controller

{

    // if the preview dismissed (done button touched), use this method to post-process previews

}

// returns the item that the preview controller should preview

- (id)previewController:(QLPreviewController *)previewController previewItemAtIndex:(NSInteger)idx

{

    NSURL *fileURL = nil;

    NSIndexPath *selectedIndexPath = [readTable indexPathForSelectedRow];

	NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

	NSString *documentDir = [documentPaths objectAtIndex:0];

	NSString *path = [documentDir stringByAppendingPathComponent:[self.dirArray objectAtIndex:selectedIndexPath.row]];

	fileURL = [NSURL fileURLWithPath:path];

    return fileURL;

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end