title: iPhone simulator swipe right works, but swipe left does not?
body: <p>I'm trying to use swipe left and right on a UIScrollView. However it looks like swipe left does not work in iPhone simulator even though swipe right does. Did I miss any step?</p>
  
  <pre>
  - (void)viewWillAppear:(BOOL)animated {
      [super viewWillAppear:animated];
  
      self.scrollView.multipleTouchEnabled = YES;
      UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
      swipe.delaysTouchesBegan = YES;
      swipe.numberOfTouchesRequired = 2;
      [self.scrollView addGestureRecognizer:swipe];
      [swipe release];
  }
  
  - (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer
  {
      if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {
  
      } else if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {
  
      }
  }
  </pre>