Dismissing keyboard from UISearchBar when the X button is tapped

Justin Galzic picture Justin Galzic · Nov 16, 2010 · Viewed 37.2k times · Source

I'm using the UISearchBar (but not the SearchDisplayController that's typically used in conjunction) and I'd like to dismiss the keyboard when you hit the 'X' button.

I've followed TomSwift's suggestion on getting called when the 'X' is tapped and that works great. But resigning first responder from the text field and also invoking in the UISearchBar instance, both with resignFirstResponder, won't make the keyboard go away.

Is there a way to get rid of the keyboard when the user has tapped the X button?

Here's what I did to get the 'Clear' notify:

- (void)viewDidLoad:
{
    for (UIView* v in searchBar.subviews)
    {
        if ( [v isKindOfClass: [UITextField class]] )
        {
            UITextField *tf = (UITextField *)v;
            tf.delegate = self;
            break;
        }
    }    
}

Then I have my class setup to implement both UISearchBarDelegate and UITextFieldDelegate.

Having the class serve as the textfield delegate allows me to get this call:

- (BOOL)textFieldShouldClear:(UITextField *)textField
{
     [textField resignFirstResponder];
     [self.searchBar resignFirstResponder];
     return YES;
}

I've tried everything I can think of. The last thing I'm trying is to find a way to issue the 'searchBarCancelButtonClicked' that UISearchDelegate will invoke on my Controller class but not I'm sure how I could do this since the UISearchBar doesn't seem to have any direct methods to invoke with this name.

Answer

radiospiel picture radiospiel · Jan 31, 2012

Toms answer got me thinking. If it is that the search bar is not yet the firstResponder when the user clicks the clear button we can just wait until it is, and then have it resignFirstResponder; i.e. along the lines of:

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
  [self performFilteringBySearchText: searchText]; // or whatever

  // The user clicked the [X] button or otherwise cleared the text.
  if([searchText length] == 0) {
    [searchBar performSelector: @selector(resignFirstResponder) 
                    withObject: nil 
                    afterDelay: 0.1];
  }
}

Works like a charm, and less hacky than Tom's IMHO.