iOS中UITextField中的密码验证 [英] Password validation in UITextField in iOS

问题描述

我的iPhone应用程序中有1 UITextfield 用于输入密码。

I have 1 UITextfield for password in my iPhone application.

我想用以下方法验证此文本字段以下验证。

I want to validate this textfield with the following validation.

• 必须至少10个字符


• 必须包含至少一个小写字母，一个大写字母，一个数字和一个特殊字符


• 有效的特殊字符是 - @＃$％^& + = ^。*（？=。 {10，}）（= * d）（= * [AZ]）（= * [AZ]）（= * [@＃$％^&安培; + =]？？？？。）* $

• Must be at least 10 characters
• Must contain at least one lower case letter, one upper case letter, one digit and one special character
• Valid special characters are – @#$%^&+=^.*(?=.{10,})(?=.*d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$

如何限制 UITextField 以上要求？

推荐答案

我就是这样做的。验证应该在用户输入密码时结束，而不是在中间。我不会使用 NSRegularExpression 。

This is how I would do it. The validation should be done at the end when the user has typed in the password and not in between.I will not be using NSRegularExpression.

-(void)textFieldDidEndEditing:(UITextField *)textField{
   int numberofCharacters = 0;
   BOOL lowerCaseLetter,upperCaseLetter,digit,specialCharacter = 0;
   if([textField.text length] >= 10)
   {
      for (int i = 0; i < [textfield.text length]; i++) 
      {
         unichar c = [textfield.text characterAtIndex:i];
         if(!lowerCaseLetter)
         {
           lowerCaseLetter = [[NSCharacterSet lowercaseLetterCharacterSet] characterIsMember:c];
         }
         if(!upperCaseLetter)
         {
           upperCaseLetter = [[NSCharacterSet uppercaseLetterCharacterSet] characterIsMember:c];
         }
         if(!digit)
         {
            digit = [[NSCharacterSet decimalDigitCharacterSet] characterIsMember:c];
         }
         if(!specialCharacter)
         {
            specialCharacter = [[NSCharacterSet symbolCharacterSet] characterIsMember:c];
         }
      }

      if(specialCharacter && digit && lowerCaseLetter && upperCaseLetter)
      {
         //do what u want
      }
      else
      { 
         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:@"Please Ensure that you have at least one lower case letter, one upper case letter, one digit and one special character"
                                                       delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
      }

   }
   else
   {
      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:@"Please Enter at least 10 password"
                                                       delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
   }
}

希望这会有所帮助......

Hope this helps...

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