如何在GetX模式下收听FocusNode

import 'package:get/get.dart';

class MyController extends GetxController {
  FocusNode focusNode = FocusNode();
}

class MyPage extends StatelessWidget {
  final MyController controller = Get.find<MyController>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextField(
          focusNode: controller.focusNode,
          // 其他TextField属性...
        ),
      ),
    );
  }
}

class MyPage extends StatelessWidget {
  final MyController controller = Get.find<MyController>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Obx(() {
          return TextField(
            focusNode: controller.focusNode,
            // 其他TextField属性...
          );
        }),
      ),
    );
  }
}