[objc] UITextField 입력값 제한

//UITextFieldDelegate 선언후...

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

    

    if(textField.text.length + string.length - range.length > 15){

        return NO;

    }

    

    

    return YES;

}