Restores the state needed to continue the given user activity.
- iOS 8.0+
The user activity to be continued.
Subclasses override this method to restore the responder’s state with the given user activity. The override should use the state data contained in the
user dictionary of the given user activity to restore the object.
User activities managed by
NSDocument can be restored automatically, if
false is returned from
application: or if it is unimplemented. In this situation, the document is opened by the
open and receives a