iphone - UISwipeGestureRecognizer 无需触摸

Question

我如何识别UISwipeGestureRecognizer与 UISwipeGestureRecognizerDirectionUp然后紧接着，无需抬起手指，就识别出 UISwipeGestureRecognizerDirectionDown识别器？

基本上我想要多个UISwipeGestureRecognizers当我改变方向时，无需抬起手指即可识别。

到目前为止我的代码...

    - (void)viewDidLoad {        
        UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(screenSwipedUp)];
        swipeUp.numberOfTouchesRequired = 1;
        swipeUp.direction = UISwipeGestureRecognizerDirectionUp;
        swipeUp.cancelsTouchesInView = NO;
        [self.view addGestureRecognizer:swipeUp];

        UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(screenSwipedDown)];
        swipeDown.numberOfTouchesRequired = 1;
        swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
        swipeDown.cancelsTouchesInView = NO;
        [self.view addGestureRecognizer:swipeDown];

    }

    - (void)screenSwipedUp {
        NSLog(@"SW-Up");
    }

    - (void)screenSwipedDown {
        NSLog(@"SW-Down");
    }

Answer 1

我认为你不能用 UISwipeGestureRecognizer 做到这一点.您可以改为使用 UIPanGestureRecognizer并实现该操作或创建 UIGestureRecognizer 的子类和 Override the methods识别您的特殊手势。