UICollectionView 上的手势识别器未接收手势

Question

我有一个带有垂直滚动集合视图的 ViewController，它占据了整个视图。我希望能够在整个集合视图（不仅仅是单元格）上获得滑动和平移手势，但我无法获得任何手势。我尝试将手势识别器添加到视图和集合视图，但似乎都不起作用。

将手势识别器添加到视图中

self.panEdgeGesture = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
self.panEdgeGesture.delegate = self;
[self.collectionView addGestureRecognizer:self.panEdgeGesture];
[self.panEdgeGesture setEdges:UIRectEdgeRight];

然后我添加了这些功能：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
   shouldReceiveTouch:(UITouch *)touch{

   return YES;
}

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

- (void)handlePan:(UISwipeGestureRecognizer *)sender 
{
 DebugLog(@"Received pan gesture");
}

集合视图单元格能否阻止手势事件触发？他们自己没有手势。

Answer 1

每UIScreenEdgePanGestureRecognizer's Class Reference:

创建屏幕边缘平移手势识别器后，分配一个 在附加手势之前为边缘属性设置适当的值 识别器到您的视图。您使用此属性来指定从哪个 手势可能开始的边缘。此手势识别器忽略任何 触摸超出第一次触摸。

所以把你的代码改成：

self.panEdgeGesture = [[UIScreenEdgePanGestureRecognizer alloc];
[self.panEdgeGesture setEdges:UIRectEdgeRight];
initWithTarget:self action:@selector(handlePan:)];
self.panEdgeGesture.delegate = self;
[self.collectionView addGestureRecognizer:self.panEdgeGesture];