objective-c – 多点触控基础(3个或更多手指)

// -viewDidLoad
UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@@R_607_10288@ctor(swiped:)];
swipeRecognizer.direction = UISwipeGestureRecognizerDirectionDown;
swipeRecognizer.numberOfTouchesrequired = 3;
[self.view addGestureRecognizer:swipeRecognizer];
[swipeRecognizer release];

…

- (void)swiped:(UISwipeGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {
        // got a three-finger swipe
    }
}