IPhone simple phone number validation

Question

I find all kinds of phone number validations on stackoverflow for the iphone but none seem to validate they just seem to change the format. example Phone number formatting.

Answer 1

Using this validation you can only enter 10 numbers. You can change it's length according to your requirement.

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

 BOOL valid = [[NSPredicate predicateWithFormat:@"SELF MATCHES %@", REGEX_FOR_INTEGERS] evaluateWithObject:_textFieldValidate.text];



       if(valid){
           if(range.length + range.location > textField.text.length)
           {
               return NO;
           }

           NSUInteger newLength = [textField.text length] + [string length] - range.length;
           return newLength <= 10;


}


return YES;

}

Hope this will help you.