iOS8开发～Swift（三）UI详解

一、概要

使用Swift来完成iOS的UI界面，其实现思想与OC实现几乎一致，只不过写法上有很大区别，个别控件较之前有较大改动。由于有纯代码强迫症，所以接下来创建一个纯代码动项目，然后在此基础上详细描述常用UI控件的Swift代码实现。

二、创建项目

首先创建一个新项目SwiftDemo，语言选择Swift，详情参考《 iOS8开发～Swift（一）入门》，然后打开项目plist文件，删除其中的Main storyboard file base name一行，其他内容不需要改动，程序会默认从AppDelegate.swift开始执行，但此时主window需要代码初始化，因为我们已经删除了storyboard，所以需要添加如下代码：

[objc] view
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func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

// Override point for customization after application launch.

self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

self.window!.backgroundColor = UIColor.whiteColor()

self.window!.makeKeyAndVisible()

return true

}

现在程序应该可以运行了，不过什么内容都没有。

下面打算搭建一个很常见都项目框架，主window的rootviewController为一个

UITabBarController对象，UITabBarController对象作为容器，其有两个标签，每个标签的内容展示为一个

UINavigationController对象，UINavigationController对象的rootViewController为实际的用户界面，相信这个结构使用OC实现大家都很熟悉了，但使用Swift该怎么样实现呢，其实思想都是一样都，只不过写法有区别而已，下面详细讨论代码实现了。

三、UI实现详解

1、在应用程序启动函数中添加如下代码：其中 viewControllerA 和 viewControllerB是需新创建都两个视图控制器，具体实现参考《 iOS8开发～Swift（一）入门》

[objc] view
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var window: UIWindow?

var tabBarController: UITabBarController?

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

// Override point for customization after application launch.

self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

self.window!.backgroundColor = UIColor.whiteColor()

var viewControllerA = ViewControllerA();

viewControllerA.title = "基本UI"

var viewControllerB = ViewControllerB();

viewControllerB.title = "其他"

self.tabBarController = UITabBarController()

self.tabBarController!.delegate = self;

self.tabBarController!.viewControllers = [

UINavigationController(rootViewController: viewControllerA),

UINavigationController(rootViewController: viewControllerB)

]

self.tabBarController!.selectedIndex = 0;

self.window!.rootViewController = self.tabBarController

self.window!.makeKeyAndVisible()

return true

}

这样，之前描述的项目框架就实现了。如果需要在UITabBarController的代理方法中做一些事情，可以实现其代理：

[objc] view
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@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, UITabBarControllerDelegate

[objc] view
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//UITabBarControllerDelegate

func tabBarController(tabBarController: UITabBarController!, didSelectViewController viewController: UIViewController!) {

}

运行效果：



2、以ViewControllerA作为UI介绍导航页面，在其中实现一个表视图TableView，其数据源从读取一个plist文件获取：

新建立一个ViewControllerA，取消勾选Xib选项，创建后重写loadView方法，然后初始化一个表视图，主要代码如下：

[objc] view
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import UIKit

class ViewControllerA: UIViewController, UITableViewDelegate, UITableViewDataSource {

var list: NSArray?

var tableView: UITableView?

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

self.list = NSArray(contentsOfFile: NSBundle.mainBundle().pathForResource("BasicUI", ofType:"plist"))

println(self.list)

self.tableView = UITableView(frame: self.view.frame, style:UITableViewStyle.Plain)

self.tableView!.delegate = self

self.tableView!.dataSource = self

self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")

self.view?.addSubview(self.tableView)

}

func numberOfSectionsInTableView(tableView: UITableView!) -> Int {

return 1;

}

func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {

return self.list!.count

}

func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!

{

let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell!

cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator

cell.textLabel.text = self.list?.objectAtIndex(indexPath.row) as String

return cell

}

// UITableViewDelegate Methods

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!)

{

self.tableView!.deselectRowAtIndexPath(indexPath, animated: true)

var itemString = self.list?.objectAtIndex(indexPath.row) as String

var viewController : UIViewController?

if itemString == "UIView" {

viewController = TheViewController()

} //省略部分代码

else {

println("viewController is nil")

}

viewController!.hidesBottomBarWhenPushed = true

self.navigationController.pushViewController(viewController, animated:true)

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

实际运行效果



3、下面逐个介绍各个控件的实现

（1）UIView

[objc] view
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import UIKit

class TheView: UIView {

override func drawRect(rect: CGRect) {

UIColor.redColor().setFill();

UIRectFill(CGRectMake(0, 100, 100, 100));

}

}

class TheViewController: UIViewController {

override func loadView() {

let theView = TheView()

theView.backgroundColor = UIColor.brownColor()

theView.layer.cornerRadius = 3

theView.layer.borderWidth = 5

theView.layer.borderColor = UIColor.darkGrayColor().CGColor

self.view = theView;

}

override func viewDidLoad() {

super.viewDidLoad()

// 添加手势

let recognizer = UITapGestureRecognizer(target: self, action: "tapAction:")

recognizer.numberOfTapsRequired = 2;

recognizer.numberOfTouchesRequired = 1;

self.view.addGestureRecognizer(recognizer)

}

func tapAction(sender: UIGestureRecognizer)

{

println("tapAction")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

其中涉及到视图手势添加，视图重会，修改Layer等实现，效果如图：



（2）UILabel

[objc] view
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import UIKit

class LabelViewController: UIViewController {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

var label = UILabel(frame: CGRectMake(0, 100, self.view.bounds.size.width, 200))

label.backgroundColor = UIColor.blackColor()

label.textColor = UIColor.whiteColor()

label.numberOfLines = 0

label.lineBreakMode = NSLineBreakMode.ByWordWrapping

label.text = "Swift is designed to provide seamless compatibility with Cocoa and Objective-C. You can use Objective-C APIs (ranging from system frameworks to your own custom code) in Swift, and you can use Swift APIs in Objective-C. "

label.font = UIFont.italicSystemFontOfSize(20)

self.view.addSubview(label)

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

效果如图：



（3）UIButton

[objc] view
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import UIKit

class ButtonViewController: UIViewController {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

var button = UIButton.buttonWithType(UIButtonType.System) as UIButton

button.frame = CGRect(x:100, y:200, width:100, height:100);

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

button.setTitleColor(UIColor.greenColor(), forState:UIControlState.Selected)

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

button.setTitle("Selected", forState:UIControlState.Selected)

button.setBackgroundImage(UIImage(named: "image.png"), forState:UIControlState.Normal)

button.tag = 1000;

button.clipsToBounds = true;

button.layer.cornerRadius = 5;

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

self.view.addSubview(button)

}

func buttonAction(sender: UIButton) {

println("buttonAction")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（4）UIImageView 与 UIImage

[objc] view
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import UIKit

class ImageViewController: UIViewController {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

var imageView = UIImageView(frame: CGRectMake(100, 100, 50, 50))

imageView.backgroundColor = UIColor.whiteColor();

imageView.animationImages = [

UIImage(contentsOfFile: NSBundle.mainBundle().pathForResource("bird-01", ofType:"png")),

UIImage(contentsOfFile: NSBundle.mainBundle().pathForResource("bird-02", ofType:"png")),

UIImage(contentsOfFile: NSBundle.mainBundle().pathForResource("bird-03", ofType:"png")),

UIImage(named: "bird-04.png")

]

imageView.contentMode = UIViewContentMode.ScaleAspectFit

imageView.animationDuration = 1;

imageView.startAnimating()

self.view.addSubview(imageView)

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果，这是一个图片动画：



（5）UITextField

[objc] view
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import UIKit

class TextFieldViewController: UIViewController, UITextFieldDelegate {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

NSNotificationCenter.defaultCenter().addObserver(self, selector: "textFieldTextDidBeginEditingNotification:", name:UITextFieldTextDidBeginEditingNotification, object:nil)

var textField = UITextField(frame: CGRectMake(10, 100, 300, 40))

textField.backgroundColor = UIColor.clearColor()

textField.textColor = UIColor.blackColor()

textField.placeholder = "请输入..."

textField.borderStyle = UITextBorderStyle.RoundedRect

textField.adjustsFontSizeToFitWidth = true

textField.delegate = self

self.view.addSubview(textField)

}

func textFieldTextDidBeginEditingNotification(sender: NSNotification!) {

}

// UITextFieldDelegate

func textFieldShouldBeginEditing(textField: UITextField!) -> Bool {

return true;

}

func textFieldDidBeginEditing(textField: UITextField!) {

}

func textFieldShouldEndEditing(textField: UITextField!) -> Bool {

return true;

}

func textFieldDidEndEditing(textField: UITextField!) {

}

func textField(textField: UITextField!, shouldChangeCharactersInRange range: NSRange, replacementString string: String!) -> Bool {

return true;

}

func textFieldShouldReturn(textField: UITextField!) -> Bool {

return true;

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（6）UITextView

[objc] view
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import UIKit

class TextViewController: UIViewController, UITextViewDelegate {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

var textView = UITextView(frame:CGRectMake(10.0, 120.0, 300.0, 400.0))

textView.backgroundColor = UIColor.blackColor()

textView.textColor = UIColor.whiteColor()

textView.editable = false

textView.font = UIFont.boldSystemFontOfSize(30)

textView.delegate = self;

textView.text = "Swift is designed to provide seamless compatibility with Cocoa and Objective-C. You can use Objective-C APIs (ranging from system frameworks to your own custom code) in Swift, and you can use Swift APIs in Objective-C. "

self.view.addSubview(textView)

}

func textViewShouldBeginEditing(textView: UITextView!) -> Bool {

return true;

}

func textViewShouldEndEditing(textView: UITextView!) -> Bool {

return true;

}

func textViewDidBeginEditing(textView: UITextView!) {

}

func textViewDidEndEditing(textView: UITextView!) {

}

func textView(textView: UITextView!, shouldChangeTextInRange range: NSRange, replacementText text: String!) -> Bool {

return true;

}

func textViewDidChange(textView: UITextView!) {

}

func textViewDidChangeSelection(textView: UITextView!) {

}

func textView(textView: UITextView!, shouldInteractWithURL URL: NSURL!, inRange characterRange: NSRange) -> Bool {

return true;

}

func textView(textView: UITextView!, shouldInteractWithTextAttachment textAttachment: NSTextAttachment!, inRange characterRange: NSRange) -> Bool {

return true;

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（7）UISwitch

[objc] view
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import UIKit

class SwitchViewController: UIViewController {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

var switchCtr = UISwitch(frame: CGRectMake(100, 100, 80, 30))

switchCtr.on = true

switchCtr.addTarget(self, action: "switchAction:", forControlEvents:UIControlEvents.ValueChanged)

self.view.addSubview(switchCtr)

}

func switchAction(sender: UISwitch) {

println("switchAction")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（8）UIScrollView

[objc] view
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import UIKit

class ScrollViewController: UIViewController, UIScrollViewDelegate {

override func loadView() {

super.loadView();

}

override func viewDidLoad() {

super.viewDidLoad()

var scroll = UIScrollView(frame: self.view.bounds)

scroll.pagingEnabled = true

scroll.scrollEnabled = true

scroll.showsVerticalScrollIndicator = true

scroll.showsHorizontalScrollIndicator = true

scroll.delegate = self

var X : CGFloat = 0

for (var i = 0; i < 2; i++) {

var label = UILabel()

label.text = "\(i)"

label.textAlignment = NSTextAlignment.Center

label.backgroundColor = UIColor.lightGrayColor()

label.frame = CGRectMake(X, 0, self.view.bounds.size.width, self.view.bounds.size.height)

X += 320

scroll.addSubview(label)

}

scroll.contentSize = CGSizeMake(22 * self.view.bounds.size.width, self.view.bounds.size.height)

self.view.addSubview(scroll)

}

// UIScrollViewDelegate

func scrollViewDidScroll(scrollView: UIScrollView!) {

println("scrollViewDidScroll")

}

func scrollViewWillBeginDragging(scrollView: UIScrollView!) {

}

func scrollViewWillEndDragging(scrollView: UIScrollView!, withVelocity velocity: CGPoint, targetContentOffset: CMutablePointer<CGPoint>) {

}

func scrollViewDidEndDragging(scrollView: UIScrollView!, willDecelerate decelerate: Bool) {

}

func scrollViewWillBeginDecelerating(scrollView: UIScrollView!) {

}

func scrollViewDidEndDecelerating(scrollView: UIScrollView!) {

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（9）UIPageView

[objc] view
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import UIKit

class PageControlViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var pageControl = UIPageControl(frame: CGRectMake(100, 100, 100, 100));

pageControl.numberOfPages = 10

pageControl.currentPage = 5

pageControl.currentPageIndicatorTintColor = UIColor.grayColor()

pageControl.pageIndicatorTintColor = UIColor.redColor()

pageControl.addTarget(self, action: "pageControlAction:", forControlEvents:UIControlEvents.ValueChanged)

self.view.addSubview(pageControl)

}

func pageControlAction(sender: UIPageControl) {

println("pageControlAction:\(sender.currentPage)")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

效果如图：



（10）UIAlertView 与 UIActionSheet

[objc] view
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import UIKit

class AlertViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidAppear(animated: Bool) {

let alertController = UIAlertController(title: "title", message: "message", preferredStyle: UIAlertControllerStyle.Alert)

// let alertController = UIAlertController(title: "title", message: "message", preferredStyle: UIAlertControllerStyle.ActionSheet)

let cancelAction = UIAlertAction(title: "cancel", style: UIAlertActionStyle.Cancel) { action in

println("cancel")

}

let otherAction = UIAlertAction(title: "other", style: UIAlertActionStyle.Default) { action in

NSLog("other")

}

let secondAction = UIAlertAction(title: "secondAction", style: UIAlertActionStyle.Default) { action in

NSLog("secondAction")

}

alertController.addAction(cancelAction)

alertController.addAction(otherAction)

alertController.addAction(secondAction)

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

}

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：





（11）UIActivityIndicatorView

[objc] view
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import UIKit

class ActivityIndicatorViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidAppear(animated: Bool) {

var activity = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.Gray)

activity.frame = CGRectMake(100, 100, 40, 40)

activity.startAnimating()

activity.hidesWhenStopped = true

self.view.addSubview(activity)

}

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（12）UISlider

[objc] view
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import UIKit

class SliderViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var slider = UISlider(frame:CGRectMake(10.0, 150.0, 300.0, 30.0))

slider.addTarget(self, action:"sliderAction:", forControlEvents:UIControlEvents.ValueChanged)

self.view.addSubview(slider)

}

func sliderAction(sender: UISlider) {

println("sliderAction:\(sender.value)")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

运行效果：



（13）UIProgressView

[objc] view
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import UIKit

class ProgressViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidAppear(animated: Bool) {

var progress = UIProgressView(progressViewStyle:UIProgressViewStyle.Default)

progress.progressTintColor = UIColor.blackColor()

progress.trackTintColor = UIColor.redColor()

progress.frame = CGRectMake(10.0, 150.0, 300.0, 40.0)

progress.setProgress(0.9, animated: true)

self.view.addSubview(progress)

}

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

效果如图：



（14）UISegmentedControl

[objc] view
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import UIKit

class SegmentedViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var segment = UISegmentedControl(items:["one", "two", "three", "four"])

segment.frame = CGRectMake(10.0, 110.0, 300.0, 30.0)

segment.segmentedControlStyle = UISegmentedControlStyle.Bordered

segment.momentary = true

segment.addTarget(self, action:"segmentAction:", forControlEvents:UIControlEvents.TouchUpInside)

self.view.addSubview(segment)

}

func segmentAction(sender: UISegmentedControl) {

println("segmentAction")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

实现效果：



（15）UIDatePicker

[objc] view
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import UIKit

class DatePickerViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var datePicker = UIDatePicker(frame:CGRectMake(0.0, 120.0, 200.0, 200.0))

datePicker.datePickerMode = UIDatePickerMode.DateAndTime

datePicker.minimumDate = NSDate.date()

datePicker.minuteInterval = 1

datePicker.addTarget(self, action: "action", forControlEvents: UIControlEvents.ValueChanged)

self.view.addSubview(datePicker)

}

func action() {

println("action")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

实现效果：



（16）UIWebView

[objc] view
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import UIKit

class WebViewController: UIViewController, UIWebViewDelegate {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var webView = UIWebView(frame: self.view.bounds)

webView.backgroundColor = UIColor.whiteColor()

webView.scalesPageToFit = true

webView.delegate = self;

var url = NSURL(string: "http://www.baidu.com")

var request = NSURLRequest(URL: url)

webView.loadRequest(request)

self.view.addSubview(webView)

}

// UIWebViewDelegate

func webViewDidStartLoad(webView: UIWebView) {

UIApplication.sharedApplication().networkActivityIndicatorVisible = true

}

func webViewDidFinishLoad(webView: UIWebView) {

UIApplication.sharedApplication().networkActivityIndicatorVisible = false

}

func webView(webView: UIWebView, didFailLoadWithError error: NSError) {

println("didFailLoadWithError")

UIApplication.sharedApplication().networkActivityIndicatorVisible = false

}

func textFieldShouldReturn(textField: UITextField) -> Bool {

textField.resignFirstResponder()

return true

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

实现效果：



（17）UIToolbar

[objc] view
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import UIKit

class ToolbarViewController: UIViewController {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var toolBar = UIToolbar(frame:CGRectMake(10.0, 120.0, 300.0, 30.0))

toolBar.barStyle = .BlackTranslucent

toolBar.tintColor = UIColor.greenColor()

toolBar.backgroundColor = UIColor.blueColor()

var flexibleSpace = UIBarButtonItem(barButtonSystemItem:UIBarButtonSystemItem.FlexibleSpace, target:"barButtonItemClicked:", action:nil)

var barBtnItemA = UIBarButtonItem(title: "one", style:UIBarButtonItemStyle.Plain, target:self, action:"barButtonItemClicked:")

var barBtnItemB = UIBarButtonItem(title: "two", style:UIBarButtonItemStyle.Plain, target:self, action:"barButtonItemClicked:")

var barBtnItemC = UIBarButtonItem(title: "three", style:UIBarButtonItemStyle.Plain, target:self, action:"barButtonItemClicked:")

var barBtnItemD = UIBarButtonItem(title: "four", style:UIBarButtonItemStyle.Plain, target:self, action:"barButtonItemClicked:")

toolBar.items = [flexibleSpace, barBtnItemA, flexibleSpace, barBtnItemB, flexibleSpace, barBtnItemC, flexibleSpace, barBtnItemD, flexibleSpace]

self.view.addSubview(toolBar)

}

func barButtonItemClicked(sender: UIBarButtonItem) {

NSLog("barButtonItemClicked: \(sender)")

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}

实现效果：



（18）UISearchBar

[objc] view
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import UIKit

class SearchBarViewController: UIViewController, UISearchBarDelegate {

override func loadView() {

super.loadView()

}

override func viewDidLoad() {

super.viewDidLoad()

var searchBar = UISearchBar(frame:CGRectMake(0, 60.0, 320.0, 100.0))

searchBar.showsCancelButton = true

searchBar.searchBarStyle = UISearchBarStyle.Default

searchBar.showsScopeBar = true

searchBar.scopeButtonTitles = [

"scope A",

"scope B"

]

self.view.addSubview(searchBar)

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

// UISearchBarDelegate

func searchBar(UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {

println("selectedScopeButtonIndexDidChange \(selectedScope)")

}

func searchBarSearchButtonClicked(searchBar: UISearchBar) {

println("searchBarSearchButtonClicked: \(searchBar.text)")

searchBar.resignFirstResponder()

}

func searchBarCancelButtonClicked(searchBar: UISearchBar) {

println("searchBarCancelButtonClicked")

searchBar.resignFirstResponder()

}

}

实现效果：



到这里基本常用到UI控件实现的Swift版本就搞定啦，当然实际项目中需要更灵活、更复杂的实现，这些代码仅供参考，希望有抛砖引玉的效果！更多内容请点击这里

Demo下载：http://download.csdn.net/detail/zfpp25_/7463851

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