如何使UIAlert按钮按下前进到下一个Storyboard？

Question

我对Swift（以及一般编码）和本网站都很陌生。

我现在有点问题。在我的应用程序中，当计时器达到0时，我会发出警报。在该警报中，有2个按钮。一个人说＆＃34;分享＆＃34;另一个说＆＃34;继续＆＃34;。我想这样做，当用户点击＆＃34;继续＆＃34;时，将向他们显示下一个故事板。截至目前，我按下的任何按钮都会关闭警报，但保持在同一个故事板上。 （它还会在控制台上打印出我按下的按钮，当然这只是我要看的。）

我该怎么做呢？这是我的代码，万一有人想知道。

let alert = UIAlertController(title: "Time's Up!", message: "What would you like to do now?", preferredStyle: .Alert)
let firstAction = UIAlertAction(title: "Continue", style: .Default) { (alert: UIAlertAction!) -> Void in
    NSLog("You pressed button one")
}

let secondAction = UIAlertAction(title: "Share", style: .Default) { (alert: UIAlertAction!) -> Void in
    NSLog("You pressed button two")
}

alert.addAction(firstAction)
alert.addAction(secondAction)
presentViewController(alert, animated: true, completion:nil)

Answer 1

试试这个：

// Create the alert controller
    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")
        let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
        let vc = storyboard.instantiateViewControllerWithIdentifier("someViewController") as UIViewController
        self.presentViewController(vc, animated: true, completion: nil)
    }

    var cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) {
        UIAlertAction in
        NSLog("Cancel Pressed")
        //do whatever you want here
    }

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

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

如果您尚未设置ViewControllerIdentifier：

您需要设置右栏中可以找到的标识符值

Answer 2

以下是可能对您有所帮助的代码。使用操作创建AlertController时，可以在定义按钮时提供按钮的操作和样式。在下面的代码中，操作位于闭包（块）中，样式定义为.Default或.Cancel

let alert = UIAlertController(title: "Time's Up!", message: "What would you like to do now?", preferredStyle: .Alert)
let firstAction = UIAlertAction(title: "Continue", style: .Default) { (alert: UIAlertAction!) -> Void in

   // Action when you press button goes here 
      print("Here you show next storyboard item.")
  //  Code to push new ViewController. For example : 
      self.navigationController?.pushViewController(newVCInstance, animated: true)
}

let secondAction = UIAlertAction(title: "Share", style: .Default) { (alert: UIAlertAction!) -> Void in
 print("Here you share things.")
    // Code to share things.
}

let thirdAction = UIAlertAction(title: "Cancel", style: . Cancel) { (alert: UIAlertAction!) -> Void in
     print("Just dismissing the Alert Controller.")
}


alert.addAction(firstAction)
alert.addAction(secondAction)
alert.addAction(thirdAction)

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