如何使用vuex实现兄弟组件通信

<template> <div id="app"> <ChildA/> <ChildB/> </div></template><script> import ChildA from './components/ChildA' // 导入A组件 import ChildB from './components/ChildB' // 导入B组件 export default { name: 'App', components: {ChildA, ChildB} // 注册A、B组件 }</script><style> #app { font-family: 'Avenir', Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-align: center; color: #2c3e50; margin-top: 60px; } div { margin: 10px; }</style>

<template> <div id="childA"> <h1>我是A组件</h1> <button @click="transform">点我让B组件接收到数据</button> <p>因为你点了B，所以我的信息发生了变化：{{BMessage}}</p> </div></template><script> export default { data() { return { AMessage: 'Hello，B组件，我是A组件' } }, computed: { BMessage() { // 这里存储从store里获取的B组件的数据 return this.$store.state.BMsg } }, methods: { transform() { // 触发receiveAMsg，将A组件的数据存放到store里去 this.$store.commit('receiveAMsg', {  AMsg: this.AMessage }) } } }</script><style> div#childA { border: 1px solid black; }</style>

<template> <div id="childB"> <h1>我是B组件</h1> <button @click="transform">点我让A组件接收到数据</button> <p>因为你点了A，所以我的信息发生了变化：{{AMessage}}</p> </div></template><script> export default { data() { return { BMessage: 'Hello，A组件，我是B组件' } }, computed: { AMessage() { // 这里存储从store里获取的A组件的数据 return this.$store.state.AMsg } }, methods: { transform() { // 触发receiveBMsg，将B组件的数据存放到store里去 this.$store.commit('receiveBMsg', {  BMsg: this.BMessage }) } } }</script><style> div#childB { border: 1px solid green; }</style>

import Vue from 'vue'import Vuex from 'vuex'Vue.use(Vuex)const state = { // 初始化A和B组件的数据，等待获取 AMsg: '', BMsg: ''}const mutations = { receiveAMsg(state, payload) { // 将A组件的数据存放于state state.AMsg = payload.AMsg }, receiveBMsg(state, payload) { // 将B组件的数据存放于state state.BMsg = payload.BMsg }}export default new Vuex.Store({ state, mutations})