如何在 Flutter MaterialApp 中检测 iOS 向后滑动手势？

Question

I want to detect when the user uses the back swipe gesture in my iOS App. How can I do it?

I created CupertinoPageRoute hoping that it would somehow work with it...

    return MaterialApp(
        initialRoute: AllProductsScreen.id,

        onGenerateRoute: (RouteSettings settings) {
          switch (settings.name) {
            case AllProductsScreen.id:
              return CupertinoPageRoute(
                  builder: (_) => AllProductsScreen(), settings: settings);
            case ProductScreen.id:
              return CupertinoPageRoute(
                  builder: (_) => ProductScreen(), settings: settings);
            case FavoritesScreen.id:
              return CupertinoPageRoute(
                  builder: (_) => FavoritesScreen(), settings: settings);
            default:
              return CupertinoPageRoute(
                  builder: (_) => AllProductsScreen(), settings: settings);
          }
        },
      );

Answer 1

You can use onWillPop from cupertino_will_pop_scope library.

@override
Widget build(BuildContext context) {
  return ConditionalWillPopScope(
    child: _MyScreenContent(),
    onWillPop: _onWillPop,
    shouldAddCallbacks: _hasChanges,
  );
}