ios - ResetPassword 中警报中的可选文本 - 使用 Swift 的 iOS 项目

Question

这是我使用 xcode 和 swift 为我的 iOS 应用程序重置密码按钮:

//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")
                let successMessage = "Email Message was Sent to You at \(self.EmailTextField.text)"

                //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)
}

如果密码重设发送成功，将会有一条打印出电子邮件地址的警报。但是它会打印带有可选单词的电子邮件!

如果没有可选字，如何打印？

Answer 1

您必须展开可选文本字段。

例如if let:

if let text = self.EmailTextField.text {
    let successMessage = "Email Message was Sent to You at \(text)"
    //Success Alert Message
    self.disaplayErrorMessage(successMessage)
}