是否可以将Pan Gesture和Swipe Gesture结合在一起？

Question

我有一个UIIMageView子类，我正在添加UIPanGestureRecognizer和UISwipeGestureRecognizer，如下所示：

self.userInteractionEnabled = YES;

UIPanGestureRecognizer * panGesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan:)];
[self addGestureRecognizer:panGesture];

UISwipeGestureRecognizer * swipeUp = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeUp:)];
swipeUp.direction = UISwipeGestureRecognizerDirectionUp;
[self addGestureRecognizer:swipeUp];

UISwipeGestureRecognizer * swipeDown = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeDown:)];
swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
[self addGestureRecognizer:swipeDown];

但是当我向上或向下滑动时，我的选择器不会被调用，但是泛有效。

任何澄清都会有所帮助。

由于

Answer 1

问题是滑动手势也会被识别为panGesture。

您需要做的是将委托设置为实现该方法的类：

- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

这将允许您同时识别这两个手势，但需要清楚地知道，当您的滑动被称为平移时，您的手柄也会被调用。

From apple documentation：

  

当gestureRecognizer或otherGestureRecognizer识别手势会阻止其他手势识别器识别其手势时，会调用此方法。请注意，保证返回YES可以同时识别;另一方面，返回NO不能保证防止同时识别，因为其他手势识别器的代表可能会返回YES。