Detecting when clear is clicked in UISearchBar (X button)

UISearchBar.m

- (void)viewDidLoad {
  //find the UITextField view within searchBar (outlet to UISearchBar)
  //and assign self as delegate
  for (UIView *view in searchBar.subviews){
    if ([view isKindOfClass: [UITextField class]]) {
      UITextField *tf = (UITextField *)view;
      tf.delegate = self;
      break;
    }
  }
}

- (void)searchBarCancelButtonClicked:(UISearchBar *) aSearchBar {
	[aSearchBar resignFirstResponder];
}

- (BOOL)textFieldShouldClear:(UITextField *)textField {
    //if we only try and resignFirstResponder on textField or searchBar,
    //the keyboard will not dissapear (at least not on iPad)!
    [self performSelector:@selector(searchBarCancelButtonClicked:) withObject:self.searchBar afterDelay: 0.1];
    return YES;
}

@astramex19 code works like a charm ! Thanks !

doesn't work

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    searchBar.searchTextField.delegate = self
}

func textFieldShouldClear(_ textField: UITextField) -> Bool {
    print("textFieldShouldClear")
    return true
}