GetxController not removed from memory with native Navigator or using in reusable widget.

[StarkShang]

GetxControllers are not automatically removed when using native Navigator or using in a reusable widget. I have a demo for this,

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return const GetMaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            // Get.to(() => const MySecondPage());
            Navigator.push(context,
                MaterialPageRoute(builder: (context) => const MySecondPage()));
          },
          child: const Text("跳转"),
        ),
      ),
    );
  }
}

class MySecondPage extends GetView<MySecondPageController> {
  const MySecondPage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    Get.put(MySecondPageController());
    return Scaffold(
      appBar: AppBar(),
      body: Column(
        children: [
          Container(
            padding: const EdgeInsets.symmetric(vertical: 20.0),
            child: ElevatedButton.icon(
              onPressed: controller.refreshTitle,
              icon: const Icon(Icons.ac_unit),
              label: const Text("刷新"),
            ),
          ),
          Obx(() => Expanded(
                  child: StatelessPage(
                title: controller.title.value,
              )))
        ],
      ),
    );
  }
}

class MySecondPageController extends GetxController {
  MySecondPageController() {
    print("second page controller created");
  }
  RxString title = "title".obs;
  refreshTitle() {
    title.value = "title${Random().nextInt(100)}";
  }

  @override
  void onInit() {
    super.onInit();
    print("second page controller inited");
  }

  @override
  void onClose() {
    super.onClose();
    print("second page controller closed");
  }
}

class StatelessPage extends GetView<StatelessPageController> {
  final String title;
  StatelessPage({Key? key, required this.title}) : super(key: key) {
    print("stateless page created");
  }

  @override
  Widget build(BuildContext context) {
    Get.put(StatelessPageController());
    return Center(
      child: Text(title),
    );
  }
}

class StatelessPageController extends GetxController {
  StatelessPageController() {
    print("stateless page controller created");
  }
  @override
  void onInit() {
    super.onInit();
    print("stateless page contoller inited");
  }

  @override
  void onClose() {
    super.onClose();
    print("stateless page contoller closed");
  }
}

The logs are as following,

Restarted application in 218ms.
[GETX] Instance "GetMaterialController" has been created
[GETX] Instance "GetMaterialController" has been initialized
flutter: second page controller created
flutter: second page controller inited
[GETX] Instance "MySecondPageController" has been created
[GETX] Instance "MySecondPageController" has been initialized
flutter: stateless page created
flutter: stateless page controller created
flutter: stateless page contoller inited
[GETX] Instance "StatelessPageController" has been created
[GETX] Instance "StatelessPageController" has been initialized

[developer-harry]

But it is remove in drawer back