AlertController - 与 UIViewController 冲突

Posted 2023-02-24

【中文标题】AlertController - 与 UIViewController 冲突

【英文标题】：AlertController - conflict with UIViewController

【发布时间】：2016-05-01 14:07:59

【问题描述】：

我正在使用 Swift 开发一个 ios 项目。我有简单的登录/注册/丢失密码视图控制器，以确保使用 Firebase 的安全性。问题在于重置密码视图控制器。如果用户单击它，它们将被发送（以模态方式呈现）到丢失密码视图控制器。

当前代码的问题在于，当 Firebase 找到输入的电子邮件并发送密码重置电子邮件时，我会提供警报控制器以供用户确认。问题是当我在警报控制器上单击“确定”时，我希望重置密码视图控制器也被解除。不知道为什么它现在不起作用。我确实收到了电子邮件，但是当我单击警报控制器上的确定按钮时，它只会关闭警报控制器，self.dismissViewControllerAnimated(true, completion: nil) 似乎并没有关闭模态呈现的重置密码视图控制器。

我试过self.dismissViewController(true, completion: nil) 和self.performSegueWithIdentifier("goToLoginVC", sender: nil)。非似乎工作，我不知道为什么。

这是函数本身：

    @IBAction func resetPasswordPressed(sender: AnyObject) 

    let email = emailTextField.text

    if email != "" 

         DataService.ds.REF_BASE.resetPasswordForUser(email, withCompletionBlock:  error in

            if error != nil 

                // Error - Unidentified Email
                showAlert(title: "Unidentified Email Address", msg: "Please, re-enter the email you have registered with.", actionButton: "OK", viewController: self)

             else 

                // Success - Sent recovery email

                let alertController = UIAlertController(title: "Email Sent", message: "An email has been sent. Please, check your email now.", preferredStyle: UIAlertControllerStyle.Alert)
                let okAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
                alertController.addAction(okAction)
                self.presentViewController(alertController, animated: true, completion: nil)

                self.dismissViewControllerAnimated(true, completion: nil)
            

         )

     else 

        showAlert(title: "Error!", msg: "Email is required in order to reset your password. Please, enter your email. ", actionButton: "OK", viewController: self)
    

【参考方案1】：

这样做：

alertController.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle. Default, handler:  action in

   //Add your logic here

))

【参考方案2】：

有人回答并提供了解决方案，但在此之后删除了他的答案。所以，这就是他所说的，而且效果很好（所以归功于那个人！）：

    @IBAction func resetPasswordPressed(sender: AnyObject) 

    let email = emailTextField.text

    if email != "" 

         DataService.ds.REF_BASE.resetPasswordForUser(email, withCompletionBlock:  error in

            if error != nil 

                // Error - Unidentified Email
                showAlert(title: "Unidentified Email Address", msg: "Please, re-enter the email you have registered with.", actionButton: "OK", viewController: self)

             else 

                // Success - Sent recovery email

                let alertController = UIAlertController(title: "Email Sent", message: "An email has been sent. Please, check your email now.", preferredStyle: UIAlertControllerStyle.Alert)

                alertController.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler:  action in

                    self.dismissViewControllerAnimated(true, completion: nil)

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

         )

     else 

        showAlert(title: "Error!", msg: "Email is required in order to reset your password. Please, enter your email. ", actionButton: "OK", viewController: self)
    

【讨论】：

我以为你不需要那个.. :)

这正是我所需要的！谢谢！

很高兴为您提供帮助.. :)