UISwipeGestureRecognizer 被 UITapGestureRecognizer 阻止

Posted 2023-03-21

【中文标题】UISwipeGestureRecognizer 被 UITapGestureRecognizer 阻止

【英文标题】：UISwipeGestureRecognizer blocked by UITapGestureRecognizer

【发布时间】：2013-05-21 11:49:32

【问题描述】：

我有一个需要处理平移、点击和滑动手势的视图。我有平移和点击工作，但是当我添加滑动时，它不起作用。奇怪的是，水龙头似乎以某种方式阻止了滑动，因为如果我移除水龙头，那么滑动就可以正常工作。以下是我创建手势识别器的方法。

- (void) initGestureHandlers

    UISwipeGestureRecognizer *swipeLeftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeLeftGesture:)];
    swipeLeftGesture.numberOfTouchesRequired = 1;
    swipeLeftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
    [self addGestureRecognizer:swipeLeftGesture];

    UISwipeGestureRecognizer *swipeRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeRightGesture:)];
    swipeRightGesture.numberOfTouchesRequired = 1;
    swipeRightGesture.direction = UISwipeGestureRecognizerDirectionRight;
    [self addGestureRecognizer:swipeRightGesture];

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
    [tapGesture setNumberOfTapsRequired:1];
    [self addGestureRecognizer:tapGesture];

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

很多博客建议使用 requireGestureRecognizerToFail 来处理在双击触发之前触发触发的情况，所以我尝试了，但它也没有用。

    [tapGesture requireGestureRecognizerToFail:swipeLeftGesture];
    [tapGesture requireGestureRecognizerToFail:swipeRightGesture];

如何在同一个视图中点击和滑动？

【问题讨论】：

您希望他们如何互动？它们都应该能够一直工作还是应该有一些依赖关系？

删除 numberOfTouchesRequired 和 setNumberOfTapsRequired 对单点点击手势和滑动手势来说不是必需的

我希望点击处理程序在我点击时触发，我希望滑动处理程序在我滑动时触发。现在滑动处理程序不会触发。

@Wain 我希望我的滑动处理程序首先触发，但我总是最终得到触摸手势

【参考方案1】：

评论或删除行

 //[tapGesture requireGestureRecognizerToFail:swipeLeftGesture];
 //[tapGesture requireGestureRecognizerToFail:swipeRightGesture];

还将所有客人对象委托设置为自己。像这样

- (void) initGestureHandlers

    UISwipeGestureRecognizer *swipeLeftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeLeftGesture:)];
    swipeLeftGesture.numberOfTouchesRequired = 1;
    swipeLeftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
    swipeLeftGesture.delegate = self;
    [self addGestureRecognizer:swipeLeftGesture];

    UISwipeGestureRecognizer *swipeRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeRightGesture:)];
    swipeRightGesture.numberOfTouchesRequired = 1;
swipeRightGesture = self;
    swipeRightGesture.direction = UISwipeGestureRecognizerDirectionRight;
    [self addGestureRecognizer:swipeRightGesture];

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
    [tapGesture setNumberOfTapsRequired:1];
    [self addGestureRecognizer:tapGesture];
tapGesture.delegate = self;

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

像这样实现委托方法

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer

    return YES;

【讨论】：

就是这样！我没有设置委托。谢谢！

【参考方案2】：

放这个试试看，

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

    return YES;

【讨论】：

不，我希望就这么简单。如果是这样，我不希望我的点击处理程序在我滑动时触发。

您的答案应该有效，除非我没有设置委托。哇！