iPhone perform action when UITextField / UISearchBar's clear button is pressed

Question

Is it possible to gain access to a delegate method that will allow additional actions to be performed when the "clear" button is pressed on a UITextField / UISearchBar?

Thanks

Answer 1

See: UITextFieldDelegate Protocol Reference

If you set your view controller as the delegate for your text field (can be done in interface builder), you can use:

- (void)clearSearchTextField
{
  ...
}

- (BOOL)textFieldShouldClear:(UITextField *)textField
{
  if (textField == self.searchTextField) [self clearSearchTextField];
  return YES;
}

Answer 2

For Swift 3:

To perform an action when the "clear" button is pressed on a UITextField

func textFieldShouldClear(_ textField: UITextField) -> Bool {
    if textField == yourTextFieldName {
        // do some action
    }
    return true
}