1 controller

class NestedController extends GetxController {
  static NestedController get to => Get.find();
  var currentIndex = 0.obs;
  final pages = ['/list', '/detail', '/login'];
  void changePage(int index) {
    currentIndex.value = index;
    Get.toNamed(pages[index], id: 1);
  }
  Route? onGenerateRoute(RouteSettings settings) {
    if (settings.name == "/login") {
      return GetPageRoute(
        settings: settings,
        page: () => LoginView(),
      );
    } else if (settings.name == "/list") {
      return GetPageRoute(
        settings: settings,
        page: () => MyListView(),
      );
    } else if (settings.name == "/detail") {
      return GetPageRoute(
        settings: settings,
        page: () => DetailView(),
      );
    }
    return null;
  }
}

2 bindings

class NestedBinding extends Bindings {
  @override
  void dependencies() {
    Get.lazyPut(() => NestedController());
  }
}

3 view

class NestedNavView extends GetView<NestedController> {
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("嵌套路由")),
      body: Container(
          color: Colors.amber,
          child: Column(
            children: [
              Container(
                child: Text("占位条"),
                height: 100,
              ),
              SizedBox(
                height: 300,
                child: Navigator(
                  key: Get.nestedKey(1),
                  initialRoute: '/list',
                  onGenerateRoute: controller.onGenerateRoute,
                ),
              )
            ],
          )),
      bottomNavigationBar: Obx(() => BottomNavigationBar(items: [
            BottomNavigationBarItem(
              icon: Icon(Icons.list),
              label: "列表",
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.details),
              label: '详情',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.login),
              label: '登录',
            ),
          ],
          currentIndex: controller.currentIndex.value,
          selectedItemColor: Colors.pink,
          onTap: controller.changePage,
          )),
    );
  }
}