Asks the delegate if the item should be highlighted during tracking.
- iOS 6.0+
- tvOS 9.0+
The collection view object that is asking about the highlight change.
The index path of the cell to be highlighted.
true if the item should be highlighted or
false if it should not.
As touch events arrive, the collection view highlights items in anticipation of the user selecting them. As it processes those touch events, the collection view calls this method to ask your delegate if a given cell should be highlighted. It calls this method only in response to user interactions and does not call it if you programmatically set the highlighting on a cell.
If you do not implement this method, the default return value is