ios - 使用标识符执行Segue

Question

我正在使用警报来执行到另一个 View 的 Segue。

                let defaultAction = UIAlertAction(title: "Proceed", style: .Default, handler: { (UIAlertAction) -> Void in

                    performSegueWithIdentifier("proceed", sender: self)

                })

我只是不明白为什么会收到错误:

Extra argument 'sender' in call

发件人应该是自己吧？ 这个错误让我发疯了好几个小时，我不知道出了什么问题! 任何帮助表示赞赏!谢谢!

Answer 1

试试这个代码:

override func viewDidLoad() {
   super.viewDidLoad()
    self.showAlert() //Calling function
}

func showAlert()
{
  let alertController = UIAlertController(title: "Download Complete", message: "The list of user IDs has been downloaded. Proceed to know who viewed your profile.", preferredStyle: .Alert)
  let defaultAction = UIAlertAction(title: "Proceed", style: .Default, handler: { (UIAlertAction) -> Void in
         self.performSegueWithIdentifier("proceed", sender: self)
  })
 alertController.addAction(defaultAction)
 self.presentViewController(alertController, animated: true, completion:nil)
}