title: UISwipeGestureRecognizer not working as expected
body: <p>So I am trying to add a swipe gesture to one of the subviews on a screen in my application. I declare the gesture recognizers as follows: </p>
  
  <pre><code>UISwipeGestureRecognizer *swiperR = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(switchStackingMode:)];
      [swiperR setDirection:UISwipeGestureRecognizerDirectionRight];
      [chart addGestureRecognizer:swiperR];
  
  UISwipeGestureRecognizer *swiperL = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(switchStackingMode:)];
      [swiperL setDirection:UISwipeGestureRecognizerDirectionLeft];
      [chart addGestureRecognizer:swiperL];
  
  
  -(void)switchStackingMode:(UISwipeGestureRecognizer *)sender {
      NSLog(@"inside switchstack from gesture");
      //other stuff
  }
  </code></pre>
  
  <p>When I attempt to interact with the subview on application launch, only the swipe gesture swiperL works. I get no response on a right swipe. I initially tried doing only one gesture recognizer with direction (UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight) but that didn't work, and based off other stack overflow answers I reverted to two separate recognizers. Still no luck, and this has me puzzled. I feel like I'm missing something..</p>