didChangePrevious method

  1. @override
void didChangePrevious (Route previousRoute)
inherited

This route's previous route has changed to the given new route. This is called on a route whenever the previous route changes for any reason, so long as it is in the history. previousRoute will be null if there's no previous route.

Implementation 

@override
void didChangePrevious(Route<dynamic> previousRoute) {
  super.didChangePrevious(previousRoute);
  changedInternalState();
}