当然，以下是一个关于如何使用Flutter事件总线插件yogurt_event_bus的代码案例。这个插件允许你在Flutter应用中不同组件之间进行事件通信。

1. 添加依赖

首先，你需要在pubspec.yaml文件中添加yogurt_event_bus依赖：

dependencies:
  flutter:
    sdk: flutter
  yogurt_event_bus: ^最新版本号  # 请替换为实际最新版本号

然后运行flutter pub get来安装依赖。

2. 定义事件类

创建一个简单的事件类，用于在事件总线中传递数据。例如，我们创建一个CounterEvent类：

class CounterEvent {
  final int count;

  CounterEvent({required this.count});
}

3. 初始化事件总线

在你的应用的主文件（通常是main.dart）中，初始化事件总线：

import 'package:flutter/material.dart';
import 'package:yogurt_event_bus/yogurt_event_bus.dart';
import 'counter_event.dart';  // 导入你定义的事件类

void main() {
  // 初始化事件总线
  EventBus eventBus = EventBus();

  runApp(MyApp(eventBus: eventBus));
}

class MyApp extends StatelessWidget {
  final EventBus eventBus;

  MyApp({required this.eventBus});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(eventBus: eventBus),
    );
  }
}

4. 发送事件

在一个组件中发送事件。例如，在一个按钮点击事件中发送CounterEvent：

import 'package:flutter/material.dart';
import 'package:yogurt_event_bus/yogurt_event_bus.dart';
import 'counter_event.dart';  // 导入你定义的事件类

class CounterSender extends StatefulWidget {
  final EventBus eventBus;

  CounterSender({required this.eventBus});

  @override
  _CounterSenderState createState() => _CounterSenderState();
}

class _CounterSenderState extends State<CounterSender> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
      // 发送事件
      widget.eventBus.fire(CounterEvent(count: _counter));
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Counter Sender'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}

5. 监听事件

在另一个组件中监听这个事件。例如，在另一个页面中监听CounterEvent并更新UI：

import 'package:flutter/material.dart';
import 'package:yogurt_event_bus/yogurt_event_bus.dart';
import 'counter_event.dart';  // 导入你定义的事件类

class CounterListener extends StatefulWidget {
  final EventBus eventBus;

  CounterListener({required this.eventBus});

  @override
  _CounterListenerState createState() => _CounterListenerState();
}

class _CounterListenerState extends State<CounterListener> {
  int _counter = 0;

  @override
  void initState() {
    super.initState();
    // 监听事件
    widget.eventBus.on<CounterEvent>().listen((event) {
      setState(() {
        _counter = event.count;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Counter Listener'),
      ),
      body: Center(
        child: Text(
          'Received count: $_counter',
          style: Theme.of(context).textTheme.headline4,
        ),
      ),
    );
  }
}

6. 组合应用

最后，将发送者和监听者组合到你的应用中。例如，使用Navigator在不同的页面之间导航：

class MyHomePage extends StatefulWidget {
  final EventBus eventBus;

  MyHomePage({required this.eventBus});

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Event Bus Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(builder: (context) => CounterSender(eventBus: widget.eventBus)),
                );
              },
              child: Text('Go to Counter Sender'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(builder: (context) => CounterListener(eventBus: widget.eventBus)),
                );
              },
              child: Text('Go to Counter Listener'),
            ),
          ],
        ),
      ),
    );
  }
}

这个示例展示了如何使用yogurt_event_bus插件在Flutter应用中发送和监听事件。你可以根据实际需求扩展和修改这个示例。