Swift - UIAlertController post action

我有一个UIAlertController实例，一旦用户点击一个按钮就会弹出给用户。用户将在警报视图中输入他/她的全名，然后按确认。我将这个值存储到数据库中。Swift - UIAlertController post action

我想在保存操作在数据库中完成时显示另一个警报控制器。我试图在通话的完成部分做到这一点，但没有奏效。这里是我试过的代码：

@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) 

    }

在执行上面的代码时，我得到这个错误：

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

任何想法是怎么回事，它如何能解决吗？我应该采取不同的方法吗？

感谢，从完成任务的方法“displayNameChangeConfirmation”

来源

2016-01-01 ksa_coder

改变电话确认动作，在成功的情况下

当前的情况下，试图展示一日一这已经是后立即显示第2个控制器表示

来源

2016-01-01 11:10:00

能否请您详细阐述更多...得到了由答案 –

困惑让我修改，以显示你应该叫方法 –

改变这一行

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

要

行打印（“未发现错误”）之后

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() 
     })

来源

2016-01-01 11:18:17 bunty

Swift - UIAlertController post action

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