Question

我试图在用户创建帐户时如此...如果他们的电子邮件尚未在“警告”框显示“创建帐户”之前使用，并且电子邮件已在创建中（在Parse上）然后会出现警告通知用户。

我似乎无法让我的代码同时执行这两项操作。只显示一条消息。我在这里做错了什么？

谢谢！

func createNewUser() {

    let newUser = PFUser()
    newUser.email = emailSignUp.text
    newUser.username = emailSignUp.text
    newUser.password = passwordSignUp.text

    newUser.signUpInBackgroundWithBlock { ( success: Bool, error: NSError?) -> Void in


       if newUser.username != nil {


        let alert: UIAlertController = UIAlertController(title: "Account created", message: "Please confirm your email", preferredStyle: .Alert)

        let okButton = UIAlertAction(title: "OK", style: .Default) { action -> Void in
        }

        alert.addAction(okButton)
        self.presentViewController(alert, animated: true, completion: nil)

       }
       else {

        let alert: UIAlertController = UIAlertController(title: "Email already registered", message: "Please enter a different email", preferredStyle: .Alert)

        let okButton = UIAlertAction(title: "OK", style: .Default, handler: nil)

        alert.addAction(okButton)

        self.presentViewController(alert, animated: true, completion: nil)
        }
    }
}

Answer 1

如果用户已经存在，则内存服务器返回的错误是与通用错误不同的字符串。您可以尝试匹配错误字符串，然后在匹配时显示警报，如果它只是一个错误（如错误字符串本身），则显示另一个警报。

newUser.signUpInBackgroundWithBlock { ( success: Bool, error: NSError?) -> Void in

if error != nil {

    if let errorString = error.userInfo?[“error”] as? String {

        if errorString == “username \(emailSignUp.text) already taken” {

            // Create alert that address is taken           
        } else {

            // Create other case alert, though it may make sense to just display the error string in an alert box
        }

    }

} else {

// Do your usual stuff

}

重复的电子邮件Alert Swift + Parse

1 个答案: