title: UITapGestureRecognizer swallows all gestures
body: <p>I'm trying to add a UITapGestureRecognizer to my app so I can detect and act upon all two finger taps, but pass any other user input through. Sounds trivial, but I just can't get it to work. Here's my code so far, inside my main view controller:</p>
  
  <pre><code>- (void) viewDidLoad {
    // other init stuff
    UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
    [tapRecognizer setNumberOfTouchesRequired:2];
    [tapRecognizer setNumberOfTapsRequired:1];
    [tapRecognizer setCancelsTouchesInView:NO];
  
    UIView *tapHolderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [tapHolderView setMultipleTouchEnabled:YES];
    [tapHolderView addGestureRecognizer:tapRecognizer];
  
    [self.view addSubview:tapHolderView];
  
    [tapRecognizer release];
  }
  
  - (void) handleTap:(UITapGestureRecognizer *) sender {
    if (sender.state == UIGestureRecognizerStateEnded) {
      // do something
    }
  }
  </code></pre>
  
  <p>What happens is this: A two finger tap will trigger the handleTap method. Any other user input, be it swipe, pinch, single-finger-tap and so on, will not be picked up by any other view (a UIToolbar, a UIWebView amongst others).</p>
  
  <p>I'd very much appreciate any insight at all on this, and please let me know if I haven't been specific enough about the problem.</p>