UItextfield shouldChangeCharactersInRange method backSpace not working

Question

I implement this code but backspace not working until i press delete button in UITextfield I want to do with Backspace delete.

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string  {

    NSCharacterSet *myCharSet = [NSCharacterSet characterSetWithCharactersInString:_demo_str];
    for (int i = 0; i < [string length]; i++) {
         unichar c = [string characterAtIndex:i];
         if ([myCharSet characterIsMember:c]) {
            return YES;
      }
    }
    return NO;
  }

Answer 1

Try this code. this working for me

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string  {

  NSCharacterSet *myCharSet = [NSCharacterSet characterSetWithCharactersInString:_demo_str];
  for (int i = 0; i < [string length]; i++) {
     unichar c = [string characterAtIndex:i];
     if ([myCharSet characterIsMember:c]) {
        return YES;
     }
     else
     {
         return NO;
     }
  }
   return YES;
}