Invoked when the mouse is released over a collection view that previously allowed a drop.
- macOS 10.6+
The collection view that send the message.
An object that contains more information about this dragging operation.
The index of the proposed drop item.
The type of dragging operation.
true if the drop operation should be accepted, otherwise
This method is called when the mouse is released over a collection view that previously decided to allow a drop via the
collection method. At this time, the delegate should incorporate the data from the dragging pasteboard and update the collection view's contents.
You must implement this method for your collection view to be a drag destination