[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.

uialertview 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, the concept of alert is unified at the system level-in the form of modal or popover.  

  viewcontroller.swiftimport uikitclass viewcontroller: uiviewcontroller {     override func viewdidload ()  {         super.viewdidload ()         // do any additional  setup after loading the view, typically from a nib.                 //Create a button         let button = uibutton (Type: uibuttontype.custom)   Initialize Uibutton        button.frame = cgrectmake (50, 100,  150, 50)  //Create a cgrect,  set location and size          Button.backgroundcolor = uicolor.greencolor ()  //Set background color          button.settitle ("Click to Show Pop-up Window",  forstate: uicontrolstate.normal)  //set the title         // Pass-Through Touch object (click event)         button.addtarget (self, action:  " buttonpressed: ",  forcontrolevents: uicontrolevents.touchupinside)          self.view.addsubview (Button)              }    // action    func buttonpressed (Sender:  uibutton)  {        showalertreset ()         }        func showalertdefault () {         let alertcontroller = uialertcontroller (title:  "pop-up window title",  message:  "hello,  This is the default style for Uialertcontroller", preferredstyle:  Uialertcontrollerstyle.alert)                 let cancelaction =  Uialertaction (title:  "Cancel",  style: uialertactionstyle.cancel, handler: nil)          let okaction = uialertaction (title:  "Good",  Style: uialertactionstyle.default, handler: nil)          let resetaction = uialertaction (title:  "Reset", style:  Uialertactionstyle.destructive, handler: nil)                  alertcontroller.addaction (resetaction)                  alertcontroller.addaction (cancelAction)         alertcontroller.addaction (okaction)                &nbSp; self.presentviewcontroller (Alertcontroller, animated: true, completion: nil)     }        func showalertreset () {         let alertcontrol = uialertcontroller (title:  " The title of the pop-up window ", message: " hello,showalertreset  ", preferredstyle:  Uialertcontrollerstyle.alert)         let cancelaction =  uialertaction (title:  "Cancel operation", style: uialertactionstyle.destructive, handler:  Nil)         let okAction     =  Uialertaction (title:  "good",  style: uialertactionstyle.default, handler: nil)          alertcontrol.addaction (cancelaction)          alertcontrol.addaction (okaction)   &nbsP;     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