iPad手势识别器 – 延迟响应

在我的应用程序中,我添加了3.2 SDK中提供的新手势识别器.一切似乎都正常工作,屏幕上的响应时间非常快.但由于某些原因,当我将requireGestureRecognizerToFail添加到我的某些手势时,触发手势时会出现非常明显的延迟.下面是我用来创建手势识别器的代码片段.有谁知道为什么会有延迟以及我如何解决它？我正在使用RequireGestureRecognizerToFail来防止在用户执行DoubleTap时触发SingleTap手势.

- (void)createGestureRecognizers {

 //Single Finger Double-Tap
 UITapGestureRecognizer *singleFingerDTap = [[UITapGestureRecognizer alloc]
            initWithTarget:self action:@SELEctor(handleSingleDoubleTap:)];
    singleFingerDTap.numberOfTapsrequired = 2;
    [super addGestureRecognizer:singleFingerDTap];

 //Single Finger Tap
 UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc]
              initWithTarget:self action:@SELEctor(handleSingleTap:)];
    singleFingerTap.numberOfTapsrequired = 1;
 [singleFingerTap  requireGestureRecognizerToFail:singleFingerDTap];
 [self addGestureRecognizer:singleFingerTap];

 //Two Finger Pan
 UIPanGestureRecognizer *panGesture2 = [[UIPanGestureRecognizer alloc]
            initWithTarget:self action:@SELEctor(handlePanGesture2:)];
    panGesture2.maximumnumberOfTouches = 2;
 [super addGestureRecognizer:panGesture2];

 //Single Finger Pan
 UIPanGestureRecognizer *panGesture1 = [[UIPanGestureRecognizer alloc]
             initWithTarget:self action:@SELEctor(handlePanGesture1:)];
    panGesture1.maximumnumberOfTouches = 1;
 [panGesture1 requireGestureRecognizerToFail:panGesture2];
 [super addGestureRecognizer:panGesture1];

 [singleFingerDTap release];
 [singleFingerTap release];
    [panGesture1 release];
 [panGesture2 release];
}