         
         self.gesture = UIPanGestureRecognizer(target: self, action: "handlePan:")
         self.gesture!.delegate = self
+        self.gesture!.maximumNumberOfTouches = 1
         
         if let _gestureTargetView = self.gestureTargetView {
             _gestureTargetView.addGestureRecognizer(self.gesture!)

                animationRatio = (location.x - self.panLocationStart) / CGRectGetWidth(bounds)
            }
            
            if self.contentScrollView != nil && animationRatio <= 0 {
                self.startGestureTransition()
                self.contentScrollView!.bounces = false
            } else {
                self.updateInteractiveTransition(animationRatio)
            }

    
    // interactive gesture
    
    public weak var gestureTargetView : UIView? {
        willSet {
            self.unregisterPanGesture()
        }
        didSet {
            self.registerPanGesture()
        }
    }
    public var panCompletionThreshold : CGFloat = 100.0
    public var direction : ARNTransitionAnimatorDirection = .Bottom
    public var contentScrollView : UIScrollView? {
