title: UIPanGestureRecognizer conflict with scrollview
body: <p>I'm trying to add a pan gesture recognizer to a view containing a scrollview, but I guess I've problems with priorities.</p>
  
  <p>My global UIView has a UIPanGestureRecognizer set like this:</p>
  
  <pre><code>_bottomPanGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(bottomPanGestureDetected:)];
  _bottomPanGestureRecognizer.minimumNumberOfTouches = 2;
  _bottomPanGestureRecognizer.maximumNumberOfTouches = 2;
  _bottomPanGestureRecognizer.delaysTouchesBegan = NO;
  _bottomPanGestureRecognizer.delaysTouchesEnded = NO;
  </code></pre>
  
  <p>I want to recognize this gesture to display another view from the bottom with some sort of pinch down-to-up.</p>
  
  <p>The problem is that the scrollview is recognizing its own pan gesture before mine.</p>
  
  <p>So I tried to delay it thanks to:</p>
  
  <pre><code>[_scrollView.panGestureRecognizer requireGestureRecognizerToFail:_bottomPanGestureRecognizer];
  </code></pre>
  
  <p>And it's working, the scrollview event is fired after my two finger down to up recognizer, but the problem is now when I only use one finger to scroll in the scrollview, the scroll works after a small delay.</p>
  
  <p>I would like to have no delay for this event, is this possible? Any idea welcomed!</p>
  
  <p>Cheers.</p>
  
  <p>Cyril</p>