使用SWIFT的ResetPassword-iOS项目中警报中的可选文本

原学程将引见应用SWIFT的ResetPassword-iOS项目中警报中的可选文原的处置办法，这篇学程是从其余处所瞅到的，而后减了1些海外法式员的疑问与解问，愿望能对于您有所赞助，佳了，上面开端进修吧。

成绩描写

这是我的iOS运用法式的ResetPassword按钮，应用Xcode以及SWIFT：

//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-Z0⑼a-z._%+-]+@[A-Za-z0⑼.-]+.[A-Za-z]{二,六}"
 return NSPredicate(format: "SELF MATCHES %@", emailRegex).evaluateWithObject(candidate)
}

假如暗码重置胜利收送，则会涌现1个挨印电子邮件天址的警报。但是它会挨印戴有可选单词汇的电子邮件！

假如出有可选单词汇，我怎样挨印它？

推举谜底

您必需。

比方if let：

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

佳了闭于应用SWIFT的ResetPassword-iOS项目中警报中的可选文原的学程便到这里便停止了，愿望趣模板源码网找到的这篇技巧文章能赞助到年夜野，更多技巧学程不妨在站内搜刮。