Notifies the delegate object that one or more items were selected.
- macOS 10.11+
The collection view notifying you of the selection change.
The set of
NSIndexobjects corresponding to the items that are now selected.
After the user successfully selects one or more items, the collection view calls this method to let you know that the selection has been made. Use this method to respond to the selection change and to make any necessary adjustments to your content or the collection view.
This method is not called when you set the selection programmatically using the methods of the