Tells the delegate that the document browser will display an activity view.
- iOS 11.0+
The current document browser.
The activity view controller to be displayed.
The document browser displays an activity view when the user shares a document (for example, when the user long presses a document and then chooses Share from the Edit Menu).
Implement this method to customize the activity view before it is displayed. For example, you could exclude any system-provided activities that are inappropriate for your app (see the