UICollectionView继承自UIScrollView。因此您可以访问;

open var isTracking: Bool { get } // returns YES if user has touched. may not yet have started dragging

open var isDragging: Bool { get } // returns YES if user has started scrolling. this may require some time and or distance to move to initiate dragging

open var isDecelerating: Bool { get } // returns YES if user isn't dragging (touch up) but scroll view is still moving

我将使用这些检查来查看集合是否正在滚动，如果是，则从所有按钮点击返回。