Tells your delegate to incorporate the drop data into the collection view.
- iOS 11.0+
The collection view that received the drop.
The coordinator object to use when handling the drop. Use this object to coordinate your custom behavior with the default behavior of the collection view.
Use this method to accept the dropped content and integrate it into your collection view. In your implementation, iterate over the
items property of the
coordinator object and fetch the data from each
UIDrag. Incorporate the data into your collection view's data source and update the collection view itself by inserting any needed items. When incorporating items, use the methods of the
coordinator object to animate the transition from the drag item's preview to the corresponding item in your collection view. For items that you incorporate immediately, you can use the
drop method to perform the animation. When loading content asynchronously from an
NSItem, you can animate the drop to a placeholder cell using the dropItem:toPlaceholderInsertedAtIndexPath:withReuseIdentifier:cellUpdateHandler: method.