初始化

lib/core/event/event_bus.dart

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+import 'dart:async';
+
+import 'global_event.dart';
+
+/// 全局事件总线
+class EventBus {
+  EventBus._();
+
+  static final _instance = EventBus._();
+
+  factory EventBus() => _instance;
+
+  // StreamController，广播模式可以让多个地方监听
+  final StreamController<GlobalEvent> _controller = StreamController.broadcast();
+
+  /// 发送事件
+  void publish(GlobalEvent event) {
+    _controller.add(event);
+  }
+
+  /// 监听事件
+  Stream<GlobalEvent> get stream => _controller.stream;
+
+
+
+  /// 关闭流（一般应用生命周期结束时调用）
+  void dispose() {
+    _controller.close();
+  }
+}

lib/core/event/global_event.dart

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+import 'package:app/data/models/common/version_dto.dart';
+
+///基类
+abstract class GlobalEvent {
+  const GlobalEvent();
+}
+
+
+///重新登录
+class UnauthorizedEvent extends GlobalEvent {}
+
+///版本更新
+class VersionUpdateEvent extends GlobalEvent {
+  final VersionDto version;
+  const VersionUpdateEvent(this.version);
+}