问题
I want to get a callback when the screen is changed, so I can stop my recurring request that runs on that specific screen. “dispose” is only called when Navigator.pop is used, but not when Navigator.push is called. Is there a way to detect that the screen is changed and not being shown at the moment?
回答1:
Register a RouteObserver on your MaterialApp or WidgetsApp and make your stateful widget a RouteAware. Sample code here: RouteObserver
来源：https://stackoverflow.com/questions/51283778/flutter-screen-change-callback