Swift学习之常用UI的使用
最近笔者在开始学习苹果最新的编程语言，因为笔者认为，苹果既然出了这门语言就绝对不会放弃，除非苹果倒闭了（当然这里知识一个玩笑）。
所以在不久的将来，swift绝对是iOS 开发的主导语言，也许不会完全取代OC。
笔者学完swift的语法之后就开始着手UI了，因为我觉得有着一定的OC基础。所以这里关于swift的语法就不做多介绍了，在后面的文章中，我将会详细介绍一下关于swift中的重点，难点语法和一些新特性。
下面是我在学习UI的时候自己总结的一些swift创建UI的代码，个人感觉和OC区别不到，但是还是有需要注意的地方。
override func viewDidLoad()
{
self.view!.backgroundColor = UIColor.whiteColor()
/**
* 1*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UILabel
*/
if self.title == "UILabel"
{
var label = UILabel(frame: self.view.bounds)
//这里也可以先创建再设置frame
label.backgroundColor = UIColor.clearColor()
label.textAlignment = NSTextAlignment.Center
label.font = UIFont.systemFontOfSize(36)
label.text = "Hello, Swift"
self.view.addSubview(label)
}
/**
* 2*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIButton
*/
else if self.title == "UIButton"
{
var button = UIButton.buttonWithType(UIButtonType.System) as? UIButton
button!.frame = CGRectMake(110.0, 120.0, 100.0, 50.0)
button!.backgroundColor = UIColor.grayColor()
button?.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)
button!.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Highlighted)
button?.setTitle("Touch Me", forState: UIControlState.Normal)
button?.setTitle("Touch Me", forState: UIControlState.Highlighted)
button?.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
button!.tag = 100
self.view.addSubview(button!)
}
/**
* 3*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UIImageView
*/
else if self.title == "UIImageView"
{
var image = UIImage(named: "swift-hero.png")
var imageView = UIImageView(frame:
CGRectMake((CGRectGetWidth(self.view.bounds) - image!.size.width) / 2.0,
120.0, image!.size.width, image!.size.height))
imageView.image = image
self.view.addSubview(imageView)
}
/**
* 4*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UISilder
*/
else if self.title == "UISlider"
{
var slider = UISlider(frame:CGRectMake(60.0, 120.0, 200.0, 30.0))
self.view.addSubview(slider)
}
/**
* 5*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UIWebView
*/
else if self.title == "UIWebView"
{
var webView = UIWebView(frame:self.view.bounds)
var url = NSURL(string: "http://caipiao.m.taobao.com")
var request = NSURLRequest(URL: url!)
webView.loadRequest(request)
self.view.addSubview(webView)
}
/**
* 6*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UISegmentedControl
*/
else if self.title == "UISegmentedControl"
{
var segmentControl = UISegmentedControl(items:["A", "B", "C", "D"])
segmentControl.frame = CGRectMake(110.0, 120.0, 100.0, 30.0)
self.view.addSubview(segmentControl)
}
/**
* 7*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UISwitch
*/
else if self.title == "UISwitch"
{
var switchControl = UISwitch(frame:CGRectMake(130.0, 120.0, 100.0, 30.0))
switchControl.on = true
self.view.addSubview(switchControl)
}
/**
* 8*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UItxetField
*/
else if self.title == "UITextField"
{
var textField = UITextField(frame:CGRectMake(60.0, 120.0, 200.0, 30.0))
textField.backgroundColor = UIColor.lightGrayColor()
textField.placeholder = "input text"
self.view.addSubview(textField)
}
/**
* 9*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIScrollView
*/
else if self.title == "UIScrollView"
{
var scrollView = UIScrollView(frame:CGRectMake(60.0, 120.0, 200.0, 200.0))
scrollView.pagingEnabled = true
scrollView.showsVerticalScrollIndicator = false
self.view.addSubview(scrollView)
var fX: CGFloat = 0.0
for(var i = 0; i < 3; ++i)
{
var view = UIView(frame:CGRectMake(fX, 0.0, 200.0, 200.0))
fX += 200.0
view.backgroundColor = UIColor.redColor()
scrollView.addSubview(view)
}
scrollView.contentSize = CGSizeMake(3 * 200.0, 200.0)
self.view.addSubview(scrollView)
}
/**
* 10*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UISearchBar
*/
else if self.title == "UISearchBar"
{
var searchBar = UISearchBar(frame:CGRectMake(10.0, 120.0, 300.0, 30.0))
searchBar.showsCancelButton = true
searchBar.searchBarStyle = UISearchBarStyle.Minimal // Default, Prominent, Minimal
self.view.addSubview(searchBar)
}
/**
* 11*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIpageControl
*/
else if self.title == "UIPageControl"
{
// PageControl
var pageControl = UIPageControl(frame:CGRectMake(60.0, 120.0, 200.0, 200.0))
pageControl.numberOfPages = 5
pageControl.currentPageIndicatorTintColor = UIColor.blackColor()
pageControl.pageIndicatorTintColor = UIColor.redColor()
self.view.addSubview(pageControl)
}
/**
* 12*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIDatePicker
*/
else if self.title == "UIDatePicker"
{
var datePicker = UIDatePicker(frame:CGRectMake(0.0, 120.0, 200.0, 200.0))
self.view.addSubview(datePicker)
}
/**
* 13*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UIPickerView
*/
else if self.title == "UIPickerView"
{
var pickerView = UIPickerView(frame:CGRectMake(10.0, 120.0, 300.0, 200.0))
pickerView.delegate = self
pickerView.dataSource = self
self.view.addSubview(pickerView)
}
/**
* 14*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIProgressView
*/
else if self.title == "UIProgressView"
{
var progressView = UIProgressView(progressViewStyle:UIProgressViewStyle.Default)
progressView.frame = CGRectMake(10.0, 120.0, 300.0, 30.0)
progressView.setProgress(0.8, animated: true)
self.view.addSubview(progressView)
}
/**
* 15*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UITextView
*/
else if self.title == "UITextView"
{
var textView = UITextView(frame:CGRectMake(10.0, 120.0, 300.0, 200.0))
textView.backgroundColor = UIColor.lightGrayColor()
textView.editable = false
textView.font = UIFont.systemFontOfSize(20)
textView.text = "Swift is an innovative new programming language for
Cocoa and Cocoa Touch. Writing code is interactive and fun, the syntax
is concise yet expressive, and apps run lightning-fast. Swift is ready
for your next iOS and OS X project — or for addition into your current
app — because Swift code works side-by-side with Objective-C."
self.view.addSubview(textView)
}
/**
* 16*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIToolbar
*/
else if self.title == "UIToolbar"
{
var toolBar = UIToolbar(frame:CGRectMake(60.0, 120.0, 200.0, 30.0))
var flexibleSpace = UIBarButtonItem(barButtonSystemItem:UIBarButtonSystemItem.FlexibleSpace, target:nil, action:nil)
var barBtnItemA = UIBarButtonItem(title: "A", style:UIBarButtonItemStyle.Plain, target:nil, action:nil)
var barBtnItemB = UIBarButtonItem(title: "B", style:UIBarButtonItemStyle.Plain, target:nil, action:nil)
var barBtnItemC = UIBarButtonItem(title: "C", style:UIBarButtonItemStyle.Plain, target:nil, action:nil)
var barBtnItemD = UIBarButtonItem(title: "D", style:UIBarButtonItemStyle.Plain, target:nil, action:nil)
toolBar.items = [flexibleSpace, barBtnItemA, flexibleSpace,
barBtnItemB, flexibleSpace, barBtnItemC, flexibleSpace, barBtnItemD,
flexibleSpace]
self.view.addSubview(toolBar)
}
/**
* 16*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊ UIActionSheet
*/
else if self.title == "UIActionSheet"
{
// Button
var button = UIButton.buttonWithType(UIButtonType.System) as? UIButton
button!.frame = CGRectMake(60.0, 120.0, 200.0, 50.0)
button!.backgroundColor = UIColor.grayColor()
button?.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)
button!.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Highlighted)
button?.setTitle("Show ActionSheet", forState: UIControlState.Normal)
button?.setTitle("Show ActionSheet", forState: UIControlState.Highlighted)
button?.addTarget(self, action: "showActionSheet", forControlEvents: UIControlEvents.TouchUpInside)
button!.tag = 101
self.view.addSubview(button!)
}
/**
* 17*＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊UIActivityIndicatorView
*/
else if self.title == "UIActivityIndicatorView"
{
var activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle:UIActivityIndicatorViewStyle.Gray)
activityIndicatorView.frame = CGRectMake(140.0, 120.0, 40.0, 40.0)
activityIndicatorView.startAnimating()
self.view.addSubview(activityIndicatorView)
}
else
{}
}
下面是一些UI中对应按钮的target，和一些需要实现的方法：
override func viewWillAppear(animated: Bool) {}
override func viewDidAppear(animated: Bool) {}
override func viewWillDisappear(animated: Bool) {}
override func viewDidDisappear(animated: Bool) {}
// Button Action
func buttonAction(sender: UIButton)
{
var mathSum = MathSum()
var sum = mathSum.sum(11, number2: 22)
var alert = UIAlertController(title: "Title", message: String(format:
"Result = %i", sum), preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
/*
var alertView = UIAlertView()
alertView.title = "Title"
alertView.message = "Message"
alertView.addButtonWithTitle("OK")
alertView.show()
*/
}
// Button Handler
// showActionSheet
func showActionSheet()
{
var alertController = UIAlertController(title: "ActionSheet", message:
"Message", preferredStyle: UIAlertControllerStyle.ActionSheet)
alertController.addAction(UIAlertAction(title: "Go Back", style: UIAlertActionStyle.Destructive, handler: nil))
self.presentViewController(alertController, animated: true, completion:nil)
}
// didReceiveMemoryWarning
override func didReceiveMemoryWarning()
{
／＊＊＊＊＊＊＊＊／
}
后面的文章里，笔者将给大家打来使用swift开发项目的一些常用技术和区分swift与OC开发！