swift常用UI控件的使用方法

对于习惯了OC代码的程序员来说，swift的语法简直让人不能忍受，今天将一些常用的UI控件简单做了一下整理。

importUIKit

classViewController:UIViewController,UIPickerViewDataSource,UIPickerViewDelegate{

overridefuncviewDidLoad() {

super.viewDidLoad()

self.view.backgroundColor=UIColor.whiteColor()

ifself.title=="UILabel"

{

// Label

letlabel=UILabel(frame:self.view.bounds)

label.backgroundColor=UIColor.clearColor()

label.textAlignment=NSTextAlignment.Center

label.font=UIFont.systemFontOfSize(36)

label.text="Hello, Swift"

self.view.addSubview(label)

}

elseifself.title=="UIButton"

{

// Button

letbutton=UIButton(type:UIButtonType.System)

button.frame=CGRectMake(110,120,100,50)

button.backgroundColor=UIColor.grayColor()

button.setTitleColor(UIColor.redColor(),forState:UIControlState.Normal)

button.setTitleColor(UIColor.whiteColor(),forState:UIControlState.Highlighted)

button.setTitle("普通",forState:UIControlState.Normal)

button.setTitle("高亮",forState:UIControlState.Highlighted)

button.addTarget(self,action:"buttonAction:",forControlEvents:UIControlEvents.TouchUpInside)

button.tag=100

self.view.addSubview(button)

}

elseifself.title=="UIImageView"

{

letimage=UIImage(named:"swift-hero.png")

letimageView=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)

}

elseifself.title=="UISlider"

{

letslider=UISlider(frame:CGRectMake(60,120,200,30))

self.view.addSubview(slider)

}

elseifself.title=="UIWebView"

{

letwebView=UIWebView(frame:self.view.bounds)

leturl=NSURL(string:"http://caipiao.m.taobao.com")

letrequest=NSURLRequest(URL:url!)

webView.loadRequest(request)

self.view.addSubview(webView)

}

elseifself.title=="UISegmentedControl"

{

letsegmentControl=UISegmentedControl(items:["A","B","C","D"])

segmentControl.frame=CGRectMake(110,120,100,30)

self.view.addSubview(segmentControl)

}

elseifself.title=="UISwitch"

{

letswitchControl=UISwitch(frame:CGRectMake(130,120,100,30))

switchControl.on=true

self.view.addSubview(switchControl)

}

elseifself.title=="UITextField"

{

lettextField=UITextField(frame:CGRectMake(60,120,200,30))

textField.backgroundColor=UIColor.lightGrayColor()

textField.placeholder="请输入"

self.view.addSubview(textField)

}

elseifself.title=="UIScrollView"

{

letscrollView=UIScrollView(frame:CGRectMake(60,120,200,200))

scrollView.pagingEnabled=true

scrollView.showsVerticalScrollIndicator=false

self.view.addSubview(scrollView)

varfX:CGFloat=0.0

for(vari=0;i<3; ++i)

{

letview=UIView(frame:CGRectMake(fX,0,200,200))

fX+=200

view.backgroundColor=UIColor(red:CGFloat(100*i) /256,green:CGFloat(100*i) /256,blue:CGFloat(100*i) /256,alpha:1)

// 这个地方因为swift对于类型的控制十分严格，颜色值采用的是CGFloat类型，但是i是int类型，所以需要强转

scrollView.addSubview(view)

}

scrollView.contentSize=CGSizeMake(3*200,0)

self.view.addSubview(scrollView)

}

elseifself.title=="UISearchBar"

{

letsearchBar=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)

}

elseifself.title=="UIPageControl"

{

// PageControl

letpageControl=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)

}

elseifself.title=="UIDatePicker"

{

letdatePicker=UIDatePicker(frame:CGRectMake(0.0,120.0,200.0,200.0))

self.view.addSubview(datePicker)

}

elseifself.title=="UIPickerView"

{

letpickerView=UIPickerView(frame:CGRectMake(10.0,120.0,300.0,200.0))

pickerView.delegate=self

pickerView.dataSource=self

self.view.addSubview(pickerView)

}

elseifself.title=="UIProgressView"

{

letprogressView=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)

}

elseifself.title=="UITextView"

{

lettextView=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)

}

elseifself.title=="UIToolbar"

{

lettoolBar=UIToolbar(frame:CGRectMake(60.0,120.0,200.0,30.0))

letflexibleSpace=UIBarButtonItem(barButtonSystemItem:UIBarButtonSystemItem.FlexibleSpace,target:nil,action:nil)

letbarBtnItemA=UIBarButtonItem(title:"A",style:UIBarButtonItemStyle.Plain,target:nil,action:nil)

letbarBtnItemB=UIBarButtonItem(title:"B",style:UIBarButtonItemStyle.Plain,target:nil,action:nil)

letbarBtnItemC=UIBarButtonItem(title:"C",style:UIBarButtonItemStyle.Plain,target:nil,action:nil)

letbarBtnItemD=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)

}

elseifself.title=="UIActionSheet"

{

// Button

letbutton=UIButton(type:UIButtonType.System)

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("ActionSheet",forState:UIControlState.Normal)

button.setTitle("ActionSheet",forState:UIControlState.Highlighted)

button.addTarget(self,action:"showActionSheet",forControlEvents:UIControlEvents.TouchUpInside)

button.tag=101

self.view.addSubview(button)

}

elseifself.title=="UIActivityIndicatorView"

{

letactivityIndicatorView=UIActivityIndicatorView(activityIndicatorStyle:UIActivityIndicatorViewStyle.Gray)

activityIndicatorView.frame=CGRectMake(140.0,120.0,40.0,40.0)

activityIndicatorView.startAnimating()

self.view.addSubview(activityIndicatorView)

}

}

funcbuttonAction(sender:UIButton) {

letalertController=UIAlertController(title:"通知",message:"确定还是取消",preferredStyle:UIAlertControllerStyle.Alert)

letalertView1=UIAlertAction(title:"确定",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("确定按钮点击事件")

}

letalertView2=UIAlertAction(title:"取消",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("取消按钮点击事件")

}

letalertView3=UIAlertAction(title:"下次吧",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("下次吧按钮点击事件")

}

alertController.addAction(alertView1)

alertController.addAction(alertView2)

alertController.addAction(alertView3)

self.presentViewController(alertController,animated:true,completion:nil)

}

funcshowActionSheet()

{

letalertController=UIAlertController(title:"通知",message:"确定还是取消",preferredStyle:UIAlertControllerStyle.ActionSheet)

letalertView1=UIAlertAction(title:"确定",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("确定按钮点击事件")

}

letalertView2=UIAlertAction(title:"取消",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("取消按钮点击事件")

}

letalertView3=UIAlertAction(title:"下次吧",style:UIAlertActionStyle.Default) { (UIAlertAction) ->Voidin

print("下次吧按钮点击事件")

}

alertController.addAction(alertView1)

alertController.addAction(alertView2)

alertController.addAction(alertView3)

self.presentViewController(alertController,animated:true,completion:nil)

}

// UIPickerViewDataSource Methods

// returns the number of 'columns' to display.

funcnumberOfComponentsInPickerView(pickerView:UIPickerView) ->Int

{

return3

}

// returns the # of rows in each component..

funcpickerView(pickerView:UIPickerView,numberOfRowsInComponentcomponent:Int) ->Int

{

return10

}

funcpickerView(pickerView:UIPickerView,titleForRowrow:Int,forComponentcomponent:Int) ->String?

{

returnString(format:"%i",row)

}

overridefuncdidReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

}

}
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