Question

这是我使用xcode和swift的iOS应用程序的ResetPassword按钮：

//ResetPssword Button
@IBAction func ResetPassword(sender: AnyObject) {

    if validateEmail(EmailTextField.text!) ==  false {
        print("Enter a Valid Email Address")
        let VaildMessage = "Enter an Email Address"
        //Empty TextField Alert Message
        self.disaplayErrorMessage(VaildMessage)
   }

    //Reset
    else {

        ref.resetPasswordForUser(EmailTextField.text) { (ErrorType) -> Void in
            if ErrorType != nil {

                let error = ErrorType
                print("There was an error processing the request \(error.description)")
                let errorMessage:String = "The Email You Entered is not Exist"
                //Error Alert Message
                self.disaplayErrorMessage(errorMessage)

            } else {

                print("Password Reset Sent Successfully")
              if let Email = self.EmailTextField.text {
                let successMessage = "Email Message was Sent to You at \(Email)"

                //Success Alert Message
                    self.disaplayErrorMessage(successMessage) }

            }

    } //reset

    } //Big Else

 } //Button


//Display Alert Message With Confirmation
func disaplayErrorMessage(theMessage:String)
{
    //Display alert message with confirmation.
    let myAlert = UIAlertController(title: "Alert", message: theMessage, preferredStyle: UIAlertControllerStyle.Alert);

    let OkAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default) {
        action in
        self.dismissViewControllerAnimated(true, completion: nil);
    }
    myAlert.addAction(OkAction);
    self.presentViewController(myAlert, animated: true, completion: nil)
}


   //Validate Email Function
func validateEmail(candidate: String) -> Bool {
    let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,6}"
    return NSPredicate(format: "SELF MATCHES %@", emailRegex).evaluateWithObject(candidate)
}

我想发出一个错误，当firebase中不存在电子邮件时，会向用户发出警报。我不知道该怎么做。我做了什么，当错误时我给了用户一个提醒！= nil 这是正确的方法吗？

Answer 1

firebase网站上有完整的错误代码列表

User Authentication

预定义的错误代码提供了在验证或处理用户时可能收到的几乎所有错误的信息。

    ref.resetPassword({
         email: EmailTextField.text!
    }, function(error) {

        if (error != nil) {

            if let errorCode = FAuthenticationError(rawValue: error.code) {
                switch (errorCode) {
                case .UserDoesNotExist:
                    println("Handle invalid user")
                case .InvalidEmail:
                    println("Handle invalid email")
                case .InvalidPassword:
                    println("Handle invalid password")
                default:
                    println("Handle default situation")
                }
            }
        } else {
            // Success!
        }
    }

Answer 2

根据FireBase doc here，情况可能并非总是如此。不要将其作为ErrorType，将其更改为错误。它将是NSError类型。检查你得到的错误代码：

if error != nil {
   if error.description == "INVALID_USER" {
     // show alert that user doesn't exists
   } else {
     // something went wrong
   }
 } 
}

处理电子邮件不存在错误 - 使用swift的iOS项目

2 个答案: