title: why override canBecomeFirstResponder?
body: <p>I'm looking at TVAnimationGestures from WWDC 2010, and in the TableVieWController.m, they override canBecomeFirstResponder:</p>
  
  <pre><code>- (BOOL)canBecomeFirstResponder {
      return YES;
  }
  </code></pre>
  
  <p>Is there a reason they do this?  I don't see this method called anywhere.  Thanks.</p>