Fluter :如何使用Getx更改变量？

dependencies:
  flutter:
    sdk: flutter
  get: ^4.1.4

import 'package:get/get.dart';

class CounterController extends GetxController {
  var count = 0;

  void increment() {
    count++;
    update(); // 通知Getx更新UI
  }
}

class HomePage extends StatelessWidget {
  final CounterController counterController = Get.put(CounterController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Getx Example'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            GetBuilder<CounterController>(
              builder: (controller) => Text(
                'Count: ${controller.count}',
                style: TextStyle(fontSize: 24),
              ),
            ),
            SizedBox(height: 16),
            ElevatedButton(
              onPressed: () => counterController.increment(),
              child: Text('Increment'),
            ),
          ],
        ),
      ),
    );
  }
}