Swift - UIAlertController post action

我有一個UIAlertController實例，一旦用戶點擊一個按鈕就會彈出給用戶。用戶將在警報視圖中輸入他/她的全名，然後按確認。我將這個值存儲到數據庫中。Swift - UIAlertController post action

我想在保存操作在數據庫中完成時顯示另一個警報控制器。我試圖在通話的完成部分做到這一點，但沒有奏效。這裏是我試過的代碼：

@IBAction func changeNamePressed(sender: AnyObject) { 
     let alertController = UIAlertController(title: "Change Full Name", message: "Please enter your name as you want it displayed in your profile", preferredStyle: .Alert) 

     let confirmAction = UIAlertAction(title: "Confirm", style: .Default) { (_) in 
      if let field = alertController.textFields![0] as? UITextField { 
       // store your data 
       self.userObject.name = field.text 
       self.nameLabel.text = field.text 
       SwiftSpinner.show("Updating Full Name") 
       let errorFound: NSError? = self.utilities.changeFullName(field.text!) 
       SwiftSpinner.hide() 
       if(errorFound?.domain != "") 
       { 
        print("Error Updating Name Change: \(errorFound?.description)") 
       }else{ 
        print("No Errors Found") 
       } 
      } else { 
       // user did not fill field 
      } 
     } 
     let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { (_) in } 
     alertController.addTextFieldWithConfigurationHandler { (textField) in 
      textField.placeholder = "Your Full Name" 
     } 
     alertController.addAction(confirmAction) 
     alertController.addAction(cancelAction) 
     self.presentViewController(alertController, animated: true, completion: displayNameChangeConfirmation) 

    } 

    func displayNameChangeConfirmation() 
    { 
     let alert = UIAlertController(title: "Profile Updated", message: "Your full name has been successfully updated.", preferredStyle: UIAlertControllerStyle.Alert) 
     alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)) 
     self.presentViewController(alert, animated: true, completion: nil) 

    }

在執行上面的代碼時，我得到這個錯誤：

Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior

任何想法是怎麼回事，它如何能解決嗎？我應該採取不同的方法嗎？

感謝，從完成任務的方法「displayNameChangeConfirmation」

來源

2016-01-01 ksa_coder

改變電話確認動作，在成功的情況下

當前的情況下，試圖展示一日一這已經是後立即顯示第2個控制器表示

來源

2016-01-01 11:10:00

能否請您詳細闡述更多...得到了由答案 –

困惑讓我修改，以顯示你應該叫方法 –

改變這一行

self.presentViewController(alertController, animated: true, completion: displayNameChangeConfirmation) //

要

行打印（「未發現錯誤」）之後

self.presentViewController(alertController, animated: true, completion: nil) // this completion handler is called immediately once alert is appeared so put it nil.

呼叫displayNameChangeConfirmation如下：

 print("No Errors Found" + field.text!) 
     dispatch_after(1, dispatch_get_main_queue(), { 
      self.displayNameChangeConfirmation() 
     })

來源

2016-01-01 11:18:17 bunty

Swift - UIAlertController post action

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