qiankun框架中基于actions机制实现主应用与子应用间的双向通信

// 此action文件为定义微应用之间全局状态
// 引入qiankun的应用间通信方法initGlobalState

import { initGlobalState } from 'qiankun';

const initalState = {
    // 这里可以写初始化数据
}

//初始化state
const actions = initGlobalState(initalState)

export default actions;

import actions from './micro/actions'
// 注册的应用列表
registerMicroApps([
  {
    name: 'sub2',//应用名字
    entry: '//localhost:8082', //子应用的启用地址
    container: '#app-vue', //子应用所展示的地址 在App.vue中设置id为app-vue
    activeRule: '/sub2', //路由地址
    // 通过props实现通信传递值
    props: {
      actions
    }
  },
  {
    name: 'sub1',//应用名字
    entry: '//localhost:8081', //子应用的启用地址
    container: '#app-vue', //子应用所展示的地址 在App.vue中设置id为app-vue
    activeRule: '/sub1', //路由地址
  },
]);

<template>
  <div id="app">
    <div class="top"></div>
    <div class="box">
      <div class="left">
        <el-menu :default-active="$route.path" router class="el-menu-vertical-demo" @open="handleOpen"
          @close="handleClose">
          <MenuItem :menu-list="menuList">
          </MenuItem>
        </el-menu>
      </div>
      <div class="right">
        <div class="bread">
          <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item v-for="(item,index) in crumb" :key="index">{{item.name}}</el-breadcrumb-item>
          </el-breadcrumb>
        </div>
        <div class="main">
          <router-view></router-view>
          <div id="app-vue"></div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import actions from '@/micro/actions'
export default {
  components: {
    MenuItem
  },
  name: "App",
  data() {
    return {
    menuList:[],
    crumb:[]
    };
  },
mounted() {
    //修改全局的actions
    let crumb=[]
    actions.setGlobalState({ crumb })
    console.log("主应用app的actions：",actions)

    //主应用监听参数变化，接受参数，展示面包屑功能
    actions.onGlobalStateChange((state, prevState) => {
      console.log("主应用app观察者，改变前的state为：", prevState);
      console.log("主应用app观察者，改变后的state为：", state);
      if(state?.crumb){
        this.crumb=state.crumb
      }else{
        this.crumb=[]
      }
    })
  }
</script>

function emptyAction() {
    // 警告：提示当前使用的是空 Action
    console.warn("Current execute action is empty!");
}

class Actions {

    // 默认值为空 Action
    actions = {
        onGlobalStateChange: emptyAction,
        setGlobalState: emptyAction
    };
    
    constructor() {
        
    }

    /**
     * 设置 actions
     */
    setActions(actions) {
        this.actions = actions;
    }

    /**
     * 映射
     */
    onGlobalStateChange(...args) {
        return this.actions.onGlobalStateChange(...args);
    }

    /**
     * 映射
     */
    setGlobalState(...args) {
        return this.actions.setGlobalState(...args);
    }
}

const actions = new Actions();
export default actions;

import actions from './actions'

function render(props = {}) {
  const { container } = props;

  if(props){
    actions.setActions(props)
  }

  instance = new Vue({
    router,
    render: (h) => h(App),
  }).$mount(container ? container.querySelector('#app') : '#app');//主应用中设置的id
}

import Vue from 'vue'
import VueRouter from 'vue-router'
import HomeView from '../views/HomeView.vue'

import actions from '@/actions'

Vue.use(VueRouter)

const routes = [{
    path: "/",
    redirect: "home"
  },
  {
    path: '/home',
    name: 'home',
    component: HomeView,
    meta:{
      fullPath:[{name:'首页'}]
    }
  },
  {
    path: '/about',
    name: 'about',
    component: () => import( /* webpackChunkName: "about" */ '../views/AboutView.vue'),
    meta:{
      fullPath:[{name:'首页'},{name:'关于'}]
    }
  }
]

const router = new VueRouter({
  mode: 'history',
  base: window.__POWERED_BY_QIANKUN__ ? '/sub2/' : '/',
  routes
})

// 通过路由守卫，把当前的路由面包屑名称传到主应用中
router.afterEach(to => {
  console.log("to:", to.meta.fullPath)
  actions.setGlobalState({ crumb: to.meta.fullPath });
})

export default router

mounted(){
    actions.onGlobalStateChange((state) => {
      console.log("我是子应用，我检测到数据了：", state);
    }, true); 
    //onGlobalStateChange的第二个参数设置为true，则会立即触发一次观察者函数
  }