'UIAlertView' was deprecated in iOS 9.0. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead

问题

I have see more so answers , but nothing helped.Here is my older alert and action for that

override func viewWillAppear(animated: Bool) {
    if Reachability.isConnectedToNetwork() == true {
        print("internet connection ok")
    } else 
    {
        print("internet not ok")
        let alertView: UIAlertView = UIAlertView(title: "Alert ", message: "connect to internet", delegate: self, cancelButtonTitle: "settings", otherButtonTitles: "cancel")
        alertView.show()
        return       
    }       
}

func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)
{
    if buttonIndex == 0 {
        //This will open ios devices wifi settings
        UIApplication.sharedApplication().openURL(NSURL(string: "prefs:root")!)
    }
    else if buttonIndex == 1
    {
        //TODO for cancel
        exit(0) 
    }
}

In that i am getting warning :

'UIAlertView' was deprecated in iOS 9.0. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead

I tried :

let alert = UIAlertController(title: "Alert", message: "My Alert for test", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Default, handler: {    (action:UIAlertAction!) in 
        print("you have pressed the Cancel button")
    }))
self.presentViewController(alert, animated: true, completion: nil)

But to add two button and add the index path of button press method link my older code,I am not able to do that. Nothing action happening fro my uialert button,

Please help me out,How can i remove that warnings and recode my Uialert with my two button action.

I am new to swift.Your help will be useful.Thanks!

回答1:

See this Code Destructive and OK buttons in UIAlertController:

let alertController = UIAlertController(title: "Destructive", message: "Simple alertView demo with Destructive and Ok.", preferredStyle: UIAlertControllerStyle.alert) //Replace UIAlertControllerStyle.Alert by UIAlertControllerStyle.alert
let DestructiveAction = UIAlertAction(title: "Destructive", style: UIAlertActionStyle.Destructive) {
    (result : UIAlertAction) -> Void in
    print("Destructive")
}

// Replace UIAlertActionStyle.Default by UIAlertActionStyle.default
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
    (result : UIAlertAction) -> Void in
    print("OK")
}

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

Swift 3:

let alertController = UIAlertController(title: "Destructive", message: "Simple alertView demo with Destructive and Ok.", preferredStyle: UIAlertControllerStyle.alert) //Replace UIAlertControllerStyle.Alert by UIAlertControllerStyle.alert

let DestructiveAction = UIAlertAction(title: "Destructive", style: UIAlertActionStyle.destructive) {
                        (result : UIAlertAction) -> Void in
    print("Destructive")
}

                    // Replace UIAlertActionStyle.Default by UIAlertActionStyle.default

let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) {
                        (result : UIAlertAction) -> Void in
    print("OK")
}

alertController.addAction(DestructiveAction)
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)

See Alert With Destructive and OK Button:

回答2:

In Swift 3, you can write this:

let alertController = UIAlertController(title: "Title", message: "This is my text", preferredStyle: UIAlertControllerStyle.alert)

let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default)  
{ 
     (result : UIAlertAction) -> Void in
      print("You pressed OK")
}
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)

回答3:

For a basic alert message I like using an extension on UIViewController:

extension UIViewController {
func alertMessageOk(title: String, message: String) {
    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
    let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
    alert.addAction(action)
    present(alert, animated: true, completion: nil)
   }
}

Usage: self.alertMessageOk(title: "Test Title", message: "Test message")

回答4:

Swift 3

    // Create message
     let alertController = UIAlertController(title: "Title",
                                           message: "Message",
                                    preferredStyle: .actionSheet)

    // Clear Action
    let clearAction = UIAlertAction(title: "Clear",
                                    style: .destructive,
                                  handler: { (action:UIAlertAction!) in
                         print ("clear")
    })
    alertController.addAction(clearAction)

    // Cancel
    let cancelAction = UIAlertAction(title: "Cancel",
                                     style: .cancel,
                                   handler: { (action:UIAlertAction!) in
                                print ("Cancel")
    })
    alertController.addAction(cancelAction)

    // Present Alert
    self.present(alertController,
                 animated: true,
                 completion:nil)

回答5:

  UIAlertController *AC = UIAlertController.alertControllerWithTitle("Title",message:"Message",preferredStyle:UIAlertControllerStyleAlert)

  UIAlertAction *ActionOne = [UIAlertAction actionWithTitle:"ActionOne" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog("ActionOne")
} ]

  UIAlertAction *ActionTwo = [UIAlertAction actionWithTitle:"ActionTwo" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { NSLog("ActionTwo")
} ]
AC.addAction(ActionOne)
AC.addAction(ActionTwo)
self.presentViewController(AC,animated:true,completion:nil)

回答6:

Try this code. Ex

 let actionSheetController: UIAlertController = UIAlertController(title: "Are you sure?", message: "", preferredStyle: .Alert)
 let cancelAction: UIAlertAction = UIAlertAction(title: "NO", style: .Cancel) { action -> Void in
                 //Do your task
  }
  actionSheetController.addAction(cancelAction)
  let nextAction: UIAlertAction = UIAlertAction(title: "YES", style: .Default) { action -> Void in
           //Do your task             //NSUserDefaults.standardUserDefaults().removePersistentDomainForName(NSBundle.mainBundle().bundleIdentifier!)
      //                  NSUserDefaults.standardUserDefaults().synchronize()
 }
 actionSheetController.addAction(nextAction)
 self.presentViewController(actionSheetController, animated: true, completion: nil)

回答7:

I have get this answer from this link i think it is useful to you

How to add an action to a UIAlertView button using Swift iOS

    var alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .Alert)

// Create the actions
var okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default) {
    UIAlertAction in
    NSLog("OK Pressed")
}
var cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) {
    UIAlertAction in
    NSLog("Cancel Pressed")
}

// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)

// Present the controller
self.presentViewController(alertController, animated: true, completion: nil)

回答8:

This code will help

let alertController = UIAlertController(title: "Default AlertController", message: "A standard alert", preferredStyle: .Alert)

let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) 
{ 
   (action:UIAlertAction!) in
   print("you have pressed the Cancel button");
}
alertController.addAction(cancelAction)

let OKAction = UIAlertAction(title: "OK", style: .Default) 
{ 
  (action:UIAlertAction!) in
                print("you have pressed OK button");
}
alertController.addAction(OKAction)

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

来源：https://stackoverflow.com/questions/36394997/uialertview-was-deprecated-in-ios-9-0-use-uialertcontroller-with-a-preferreds