[Swift] Uikit Learning Warning Box: Uialertcontroller and Uialertview

Important: Uialertview is deprecated in IOS 8. (Note that uialertviewdelegate is also deprecated.) To create and manage alerts in IOS 8 and later, instead use Uialertcontroller with a preferredstyle ofuialertcontrollersty Lealert.

Using Uialertview in Xcode7 will report the following warning:

' Uialertview ' was deprecated on IOS 9.0:uialertview is deprecated. Use Uialertcontroller with a preferredstyle of Uialertcontrollerstylealert instead

Alert Views:alert views display a concise and informative alert message to the user.

Uialertcontroller also replaces Uialertview and Uiactionsheet, unifying the concept of alert at the system level-either in modal or PopOver mode.

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//  ViewController.swiftimport UIKitclassViewController: UIViewController {    override func viewDidLoad() {        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.                //创建一个Button        let button = UIButton(type: UIButtonType.Custom) //初始化UIButton        button.frame = CGRectMake(50, 100, 150, 50) //创建一个CGRect, 设置位置和大小        button.backgroundColor = UIColor.greenColor() //设置背景色        button.setTitle("点击显示弹窗", forState: UIControlState.Normal) //设置标题        //传递触摸对象(点击事件)        button.addTarget(self, action: "buttonPressed:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(button)            }    // Action    func buttonPressed(sender: UIButton) {        showAlertReset()       }        func showAlertDefault(){        let alertController = UIAlertController(title: "弹窗标题", message: "Hello, 这个是UIAlertController的默认样式", preferredStyle: UIAlertControllerStyle.Alert)                let cancelAction = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel, handler: nil)        let okAction = UIAlertAction(title: "好的", style: UIAlertActionStyle.Default, handler: nil)        let resetAction = UIAlertAction(title: "重置", style: UIAlertActionStyle.Destructive, handler: nil)                alertController.addAction(resetAction)                alertController.addAction(cancelAction)        alertController.addAction(okAction)                self.presentViewController(alertController, animated: true, completion: nil)    }        func showAlertReset(){        let alertControl = UIAlertController(title: "弹窗的标题", message: "Hello,showAlertReset ", preferredStyle: UIAlertControllerStyle.Alert)        let cancelAction = UIAlertAction(title: "取消操作", style: UIAlertActionStyle.Destructive, handler: nil)        let okAction     = UIAlertAction(title: "好的", style: UIAlertActionStyle.Default, handler: nil)        alertControl.addAction(cancelAction)        alertControl.addAction(okAction)        self.presentViewController(alertControl, animated: true, completion: nil)    }        override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}

Reference:

Http://www.jianshu.com/p/86f933850df8

http://blog.csdn.net/xiaowenwen1010/article/details/40108097

[Swift] Uikit Learning Warning Box: Uialertcontroller and Uialertview