在swift中使用解析重置密码

好的，那么我怎样才能访问添加块末尾的“textField”呢？我尝试创建一个名为“alertTextField”的全局属性，然后将其设置为块中的textField，以便我可以在其他操作中访问它，但它似乎不起作用。有什么建议吗

谢谢大家!

  @IBAction func resendPassword(sender: AnyObject) {

    let alertController : UIAlertController = UIAlertController(title: "Forgot Password?", message: "Enter your email", preferredStyle: UIAlertControllerStyle.Alert)

    let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .Cancel) { action -> Void in

    }

    alertController.addAction(cancelAction)

    alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in

        textField == self.alertTextField

        textField.delegate = self
        textField.placeholder = "Email"
    }

    let sendAction: UIAlertAction = UIAlertAction(title: "Send", style: UIAlertActionStyle.Default) { action -> Void in

        if (self.alertTextField?.text != nil) {

        PFUser.requestPasswordResetForEmailInBackground(self.alertTextField!.text)

        }

    }

    alertController.addAction(sendAction)

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

}

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有关详细信息，请查看此处的示例代码：

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@如何接受答案

@IBAction func resendPassword(sender: AnyObject) {

    let alertController : UIAlertController = UIAlertController(title: "Forgot Password?", message: "Enter your email", preferredStyle: UIAlertControllerStyle.Alert)

    alertController.addTextFieldWithConfigurationHandler { (textField) -> Void in
        textField.placeholder = "Email"
    }

    let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)

    alertController.addAction(cancelAction)

    let sendAction = UIAlertAction(title: "Send", style: UIAlertActionStyle.Default) { _ in
        // below is how you access the textField
        let emailTextField = alertController.textFields![0] as UITextField
        if let email = emailTextField.text {
            PFUser.requestPasswordResetForEmailInBackground(email)
        }
    }

    alertController.addAction(sendAction)

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

}