Tells the delegate that the user selected a list item.
- iOS 12.0+
The list template containing the selected item.
The item selected by the user.
The block that your app must call after handling the selected item.
When implementing this method, perform any necessary operations to prepare for completing the item selection, including updating your user interface. You must call
completion after handling the selected item to tell the system that it can continue. The list template displays an activity indicator—after a short delay—while it waits for your implementation to call the completion handler.