一个UILongPressGestureRecognizer的子类，它大大简化了触摸识别的工作。

CXTapGestureRecognizer *gestureRecognizer = [[CXTapGestureRecognizer alloc] init];
gestureRecognizer.delegate = self;
[self.view addGestureRecognizer:gestureRecognizer];

✓ 用于 start、update、cancel 和 finish 的代理协议方法。

- (void)tapGestureRecognizerDidStart:(CXTapGestureRecognizer *)gestureRecognizer
{
    NSLog("Gesture recognizer started");
}

- (void)tapGestureRecognizerDidUpdate:(CXTapGestureRecognizer *)gestureRecognizer
{
    NSLog("Gesture recognizer updated");
}

- (void)tapGestureRecognizerDidCancel:(CXTapGestureRecognizer *)gestureRecognizer
{
    NSLog("Gesture recognizer cancelled");
}

- (void)tapGestureRecognizerDidFinish:(CXTapGestureRecognizer *)gestureRecognizer
{
    NSLog("Gesture recognizer finished");
}

✓ 用于取消的代理方法。

- (BOOL)swipeGestureRecognizerShouldCancel:(CXSwipeGestureRecognizer *)gestureRecognizer
{
    return YES;
}

完整API

CXSwipeGestureRecognizerDelegate

- (void)tapGestureRecognizerDidStart:(CXTapGestureRecognizer *)gestureRecognizer;
- (void)tapGestureRecognizerDidUpdate:(CXTapGestureRecognizer *)gestureRecognizer;
- (void)tapGestureRecognizerDidCancel:(CXTapGestureRecognizer *)gestureRecognizer;
- (void)tapGestureRecognizerDidFinish:(CXTapGestureRecognizer *)gestureRecognizer;

- (BOOL)tapGestureRecognizerShouldCancel:(CXTapGestureRecognizer *)gestureRecognizer;

CXSwipeGestureRecognizer : UILongPressGestureRecognizer

@property (unsafe_unretained) id <CXTapGestureRecognizerDelegate> delegate;