在Flutter App中使用GetX时，如何响应屏幕方向的更改？
OrientationBuilder不工作，即使 Package 在Obs内并使用Get.context.isLandscape等。
在一个测试应用程序中，我尝试了以下方法，但没有效果：

class Home extends GetView<StoreController> {
  Home({Key? key}) : super(key: key) {
    Get.put(StoreController());
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Orientation Test"),

        // Does not work
        leading: OrientationBuilder(
          builder: (ctx, or) {
            return Get.context?.isLandscape ?? false 
                ? const Icon(Icons.menu) 
                : const Icon(Icons.add);
          },
        ),

        // Does not work
        leading: OrientationBuilder(
          builder: (ctx, orientation) {
            return orientation == Orientation.landscape
                ? const Icon(Icons.menu)
                : const Icon(Icons.add);
          },
        ),

        // Does not work (error: improper use of Obs())
        leading: Obx(() {
          //controller.counter.value++;
          return OrientationBuilder(
            builder: (ctx, orientation) {
              return orientation == Orientation.landscape 
                  ? const Icon(Icons.menu) 
                  : const Icon(Icons.add);
            },
          );
        }),

      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Obx(() => Text('${controller.counter.value}', style: Theme.of(context).textTheme.headline4)),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(onPressed: controller.incCounter, tooltip: 'Increment', child: const Icon(Icons.add)),
    );
  }
}

简单控制器：

class StoreController extends GetxController {
  final counter = 0.obs;

  void incCounter() {
    counter.value++;
  }
}