<template>
 <!--路由渲染的功能模块区域-->
 <div class="router-out-content">
  <!--缓存部分页面的写法-->
  <keep-alive>
   <router-view v-show="!showIframe" class="position router-content" v-if="$route.meta.keepAlive"></router-view>
  </keep-alive>
  <router-view v-show="!showIframe" class="position router-content" v-if="!$route.meta.keepAlive"></router-view>
  <!--兼容系统外部页面-->
  <iframe-temp v-show="showIframe"></iframe-temp>
 </div>
</template>
<style scoped lang="scss">
 .position {
  position: relative
 }

 .router-out-content {
  position: static;
 }
</style>
<script>
import { mapState } from 'vuex'
import iframeTemp from '@/containers/main/IframeTemplate.vue'
export default {
 data() {
  return {}
 },
 components: {
  iframeTemp
 },
 computed: {
  ...mapState([
   'showIframe'
  ])
 }
}
</script>

/*
 * IframeTemplate.vue组件的内部
 **/

 <template>
 <!--iframe页面展示区域-->
 <div id="fwIframe">
  <!--<Tabs class="full temporary-tabs" v-model="store.state.iframeSelectTab" type="card">-->
  <Tabs class="full temporary-tabs" :value="iframeSelectTab" type="card">
   <TabPane
    v-for="(item, index) in iframeTabData"
    :key="item.tag"
    :label="item.name"
    :name="item.tag"
   >
    <iframe :key="item.tag" v-once :src="/UploadFiles/2021-04-02/item.url">

之后的ifram组件的显示隐藏和tab切换，都是通用vuex和bus事件广播实现的



/*
 * mainConst.js
 **/


/*****************************getter常量****************************************/
export const G_GET_NAVTABDATA = 'G_GET_NAVTABDATA'

/*****************************mutations常量*************************************/
// 一级tab处理
export const M_PUSH_NAVTABDATA = 'M_PUSH_NAVTABDATA'
export const M_DELETE_NAVTABDATA = 'M_DELETE_NAVTABDATA'
export const M_UPDATE_NAVTABDATA = 'M_UPDATE_NAVTABDATA'

// iframe切换处理
export const M_SHOW_IFRAME = 'M_SHOW_IFRAME'
export const M_HIDE_IFRAME = 'M_HIDE_IFRAME'

// iframe添加，删除，选择处理
export const M_IFRAME_PUSH_TAB='M_IFRAME_PUSH_TAB'
export const M_IFRAME_DELETE_TAB='M_IFRAME_DELETE_TAB'
export const M_IFRAME_CHANGE_SELECTCODE='M_IFRAME_CHANGE_SELECTCODE'

// 设置全局系统变量
export const M_SET_SYSTEMNAME = 'M_SET_SYSTEMNAME'

/*****************************actions常量***************************************/
// export const A_REQUEST_DATA = 'A_REQUEST_DATA'






/*
 * mainModule.js
 **/

import * as mainConst from './mainConst.js'

export default {
 state: {
  // 一级Tab导航数据集合
  navTabData: [],
  // 进入的主系统前缀
  systemName:'',
  // 控制路由同级的Iframe的显示隐藏
  showIframe: false,
  // iframe页面中的选中页签的code值
  iframeSelectTab:'',
  // iframe页面的tab数据集合
  iframeTabData:[]

 },
 getters: {
  [mainConst.G_GET_NAVTABDATA](state, getters){
   return state.navTabData
  }
 },
 mutations: {
  // 一级tab处理
  [mainConst.M_UPDATE_NAVTABDATA](state, payload){
   const index = payload.navIndex
   state.navTabData.forEach((item)=> {
    item.active = false
   })

   // 当你利用索引直接设置一个项时是不能触发视图的从新渲染的,下面是老方法和解决办法
   // state.navTabData[index].active=true
   let newItem = Object.assign({}, state.navTabData[index], {active: true})
   // console.log(newItem, 'store newItem')
   state.navTabData.splice(index, 1, newItem)
  },
  [mainConst.M_PUSH_NAVTABDATA] (state, payload) {
   state.navTabData.push(payload)
  },
  [mainConst.M_DELETE_NAVTABDATA] (state, payload) {
   state.navTabData.splice(payload.navIndex, 1)
  },
  // Iframe显示隐藏切换处理
  [mainConst.M_SHOW_IFRAME] (state, payload) {
   state.showIframe = true
  },
  [mainConst.M_HIDE_IFRAME] (state, payload) {
   state.showIframe = false
  },
  // Iframe添加，删除，选中处理
  [mainConst.M_IFRAME_PUSH_TAB] (state, payload) {
   state.iframeTabData.push(payload)
  },
  [mainConst.M_IFRAME_DELETE_TAB] (state, payload) {
   state.iframeTabData = state.iframeTabData.filter(tab => tab.tag !== payload.tag)
  },
  [mainConst.M_IFRAME_CHANGE_SELECTCODE] (state, payload) {
   state.iframeSelectTab=payload
  },
  // 设置全局system变量
  [mainConst.M_SET_SYSTEMNAME] (state, payload) {
   state.systemName=payload
  }
 },
 actions: {
  // actions的最终功能是修改state，但是它不直接修改state，而是调用mutations
  // async [aboutConst.A_REQUEST_DATA]({dispatch,commit}) {
  //  commit(aboutMutations.REQUEST_LOADING)
  //  await service.getMovieListData('{"movieType":"in_theaters","pageIndex":2,"start":0,"count":10}')
  //  console.log(333333)
  //  await function(){setTimeout(function () {
  //   commit(aboutMutations.REQUEST_FAILD)
  //  },6000)}()
  //  console.log(66666)
  // }

  // actions的最终功能是修改state，但是它不直接修改state，而是调用mutations
  // async [aboutConst.A_REQUEST_DATA]({dispatch,commit}) {
  //  commit(aboutMutations.REQUEST_LOADING)
  //  await service.getMovieListData('{"movieType":"in_theaters","pageIndex":2,"start":0,"count":10}')
  //  console.log(333333)
  //  await function(){setTimeout(function () {
  //   commit(aboutMutations.REQUEST_FAILD)
  //  },6000)}()
  //  console.log(66666)
  // }
 }
}






/*
 * 三级菜单的点击处理
 **/
<template>
 <!--三级菜单导航功能-->
 <div class="main-nav f14 clearfix" @mouseleave="funMenu.menuIsShow=false">
  <div class="f_l lt-tab">
   <ul class="l-nav clearfix">
    <li class="main f_l">
     <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f16 fun" @click="getMainMenu">功能导航</a>
     <div class="more-menu clearfix" v-show="funMenu.firstMenu.length&&funMenu.menuIsShow">
      <!--一级导航-->
      <ul class="first-menu f_l">
       <li v-for="(item,index) in funMenu.firstMenu" @mouseover="clickByMenu($event,item,'firstMenu')">
        <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" :class="{active:item.active}" :index="index">{{item.resourceName}}</a>
       </li>
      </ul>
      <!--二级导航-->
      <ul class="next-menu f_l" v-show="funMenu.nextMenu.length">
       <li
        v-for="(item,index) in funMenu.nextMenu"
        @mouseover="clickByMenu($event,item,'nextMenu')"
        @click="clickMenuJump(funMenu.nextMenu, item)"
       >
        <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" :class="{active:item.active}" :index="index">{{item.resourceName}}</a>
       </li>
      </ul>
      <!--三级导航-->
      <!--存在四级导航-->
      <div class="last-menu f_l dl" v-show="funMenu.lastMenu.length">
       <div v-for="(item,index) in funMenu.lastMenu" class="dt">
        <div v-if="item.childFuncs.length">
         <span>{{item.resourceName }}</span>
         <ul class="dd">
          <li v-for="(item,index) in item.childFuncs"
           @click="clickByMenu($event,item,'lastMenu')">
           <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{item.resourceName}}</a>
           <!--:class="{active:item.active}"-->
          </li>
         </ul>
        </div>
        <!--三级导航可点击-->
        <div v-else>
         <ul class="dd">
          <li @click="clickByMenu($event,item,'lastMenu')">
           <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{item.resourceName}}</a>
           <!--:class="{active:item.active}"-->
          </li>
         </ul>
        </div>

       </div>
      </div>
     </div>
    </li>
    <li class="nav-index f_l">
     <!--<router-link :to="'/'+$store.state.systemName">首页</router-link>-->
     <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" @click="goHome">首页</a>
    </li>
   </ul>
  </div>
 </div>
</template>
<style scoped lang="scss">
 .main-nav {
  position: relative;
  height: 42px;
  line-height: 42px;
  background: #eee;
  border-bottom: 1px solid #ddd;
 }

 .main-nav a {
  color: #303e51;
  text-decoration: none;
 }

 .main-nav a:hover {
  color: #438eb9;
 }

 .main-nav .main {
  /*padding: 0 16px;*/
  text-align: center;
  border-right: 1px solid #ddd;
  position: relative;
  background: #eee;
  width: 122px;
 }

 .main-nav .main.active, .main-nav .main:hover {
  background: white;
 }

 .main-nav .more-menu {
  position: fixed;
  top: 84px;
  left: 0;
  max-height: 500px;
  bottom: 124px;
  z-index: 998;
  background: #fff;
  border: 1px solid #ddd;
  border-left: none;
  border-top: 0;
  overflow: hidden;
  box-shadow: 1px 1px 10px #ddd;
 }

 .main-nav .more-menu ul, .main-nav .more-menu .dl {
  text-align: left;
  overflow: auto;
 }

 .main-nav .more-menu a {
  font-size: 14px;
  color: #303e51;
  text-decoration: none;
 }

 .main-nav .more-menu a:hover, .main-nav .more-menu a.active {
  color: rgb(46, 167, 224);
 }

 .main-nav .more-menu .first-menu {
  height: 100%;
  border-right: 1px solid #ddd;
  box-shadow: -1px 0px 5px #ddd inset;
  /*width: 138px;*/
 }

 .main-nav .more-menu .first-menu li {
  height: 36px;
  line-height: 36px;
  margin: 0 15px 0 6px;
  min-width: 94px;
 }

 .main-nav .more-menu .first-menu a {
  display: block;
  background: url(../../asserts/images/home/main/icon_1.png) no-repeat 5px center;
  width: 100%;
  height: 100%;
  border-bottom: 1px solid #dddddd;
  padding-left: 20px;
  box-sizing: border-box;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  text-indent: 5px;
 }

 .main-nav .more-menu .first-menu a.active, .main-nav .more-menu .first-menu a:hover {
  background: url(../../asserts/images/home/main/icon_2.png) no-repeat 5px center rgb(46, 167, 224);
  color: white;
  border: 0;
 }

 .main-nav .more-menu .next-menu {
  height: 100%;
  border-right: 1px solid #ddd;
  box-shadow: -1px 0px 5px #ddd inset;
  /*width: 138px;*/
  line-height: 14px;
 }

 .main-nav .more-menu .next-menu li:first-child {
  margin-top: 10px;
 }

 .main-nav .more-menu .next-menu li {
  margin-bottom: 16px;
  margin-left: 16px;
 }

 .main-nav .more-menu .next-menu li a {
  border-left: 2px solid transparent;
  padding-left: 10px;
  margin-right: 24px;
 }

 .main-nav .more-menu .next-menu li a:hover, .main-nav .more-menu .next-menu li a.active {
  border-left: 2px solid rgb(46, 167, 224);
 }

 .main-nav .more-menu .last-menu {
  height: 100%;
  min-width: 288px;
  line-height: 14px;
 }

 .main-nav .more-menu .last-menu .dt {
  margin-left: 16px;
  margin-top: 10px;
  span {
   color: #566678;
  }
 }

 .main-nav .more-menu .last-menu .dd {
  color: #7a8897;
  margin-top: 16px;
  margin-left: 4px;
  > li {
   margin-bottom: 16px;
   a {
    border-left: 2px solid transparent;
    padding-left: 6px;
    margin-right: 16px;
    &:hover, &.active {
     border-color: #2ea7e0;
    }
   }
  }
 }

 /*.main-nav .more-menu .last-menu dd a:hover,.main-nav .more-menu .last-menu dd a.active{*/
 /*border-left: 2px solid rgb(46,167,224);*/
 /*}*/
 .main-nav .main .fun {
  width: 100%;
  height: 100%;
  display: block;
 }

 .main-nav .main .fun:before {
  content: "";
  width: 18px;
  height: 18px;
  background: url("../../asserts/images/home/main/icon-all.png");
  background-position: -89px -7px;
  display: inline-block;
  margin-right: 10px;
  margin-top: 2px;
  vertical-align: text-top;
 }

 .main-nav .l-nav {
  z-index: 2;
 }

 .main-nav .nav-index {
  width: 90px;
  text-align: center;
  position: relative;
  background: #eee;
 }

 .main-nav .nav-index:after {
  content: "";
  width: 8px;
  height: 40px;
  background: url(../../asserts/images/home/main/shadow-l.png);
  position: absolute;
  top: 2px;
  left: 90px;
 }

 .main-nav .lt-tab {
  position: absolute;
  left: 0;
  z-index: 2;
  border-bottom: 1px solid #ddd;
 }

 /*tab--------*/
 .main-nav .ct-tab {
  position: absolute;
  z-index: 1;
  left: 213px;
  width: 10000000px;
 }

 .main-nav .ct-tab .ct-ul {

 }

 .main-nav .ct-tab .ct-ul li {
  position: relative;
  float: left;
 }

 .main-nav .ct-tab .ct-ul li a {
  height: 24px;
  line-height: 24px;
  margin: 9px 0;
  min-width: 90px;
  /*max-width: 190px;*/
  border-right: 1px solid #ddd;
  display: block;
  text-align: center;
  position: relative;
 }

 .main-nav .ct-tab .ct-ul li a i {
  display: none;
 }

 .main-nav .ct-tab .ct-ul li a i {
  display: none;
 }

 .main-nav .ct-tab .ct-ul li a .content {
  display: block;
  max-width: 190px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
 }

 .main-nav .ct-tab .ct-ul li a:hover {
  z-index: 1;
 }

 .main-nav .ct-tab .ct-ul li:first-child a:hover, .main-nav .ct-tab li:first-child a.active {
  margin-left: 0;
  margin-right: 0;
 }

 .main-nav .ct-tab .ct-ul li a:hover, .main-nav .ct-tab li a.active {
  max-width: 250px;
  display: block;
  text-align: center;
  position: relative;
  border: 0;
  margin: 0 -20px;
  margin-top: 4px;
  color: black;
  padding: 0;
 }

 .main-nav .ct-tab .padding {
  width: auto;
  padding: 0 16px;
 }

 .main-nav .ct-tab .ct-ul li a:hover > i, .main-nav .ct-tab .ct-ul li a.active > i {
  display: inline-block;
  width: 34px;
  height: 37px;
  float: left;
 }

 .main-nav .ct-tab .ct-ul li a:hover .line-l {
  background: url(../../asserts/images/home/main/line_left.png) no-repeat;
 }

 .main-nav .ct-tab .ct-ul li a:hover .line-r {
  background: url(../../asserts/images/home/main/line_right.png) no-repeat;
 }

 .main-nav .ct-tab .ct-ul li a.active .line-l {
  background: url(../../asserts/images/home/main/line_sel_left.png) no-repeat;
 }

 .main-nav .ct-tab .ct-ul li a.active .line-r {
  background: url(../../asserts/images/home/main/line_sel_right.png) no-repeat;
 }

 .main-nav .ct-tab .ct-ul li a:hover .content, .main-nav .ct-tab li a.active .content {
  border-top: 1px solid #ddd;
  float: left;
  line-height: 36px;
  min-width: 60px;
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: rgb(245, 245, 245);
 }

 .main-nav .ct-tab .ct-ul li a:hover .cha, .main-nav .ct-tab .ct-ul li a.active .cha {
  background: rgb(245, 245, 245);
  width: 20px;
  height: 36px;
  line-height: 36px;
  border-top: 1px solid #ddd;
  padding-left: 7px;
  color: #303e51;
 }

 .main-nav .ct-tab .ct-ul li a.active .content, .main-nav .ct-tab .ct-ul li a.active .cha {
  background: white;
 }

 .main-nav .ct-tab .ct-ul li a .cha {
  color: #eee;
 }

 .main-nav .ct-tab .ct-ul li a .cha:hover {
  color: black;
 }

 .main-nav .ct-tab .ct-ul li a.active {
  z-index: 2;
 }
</style>
<script>
 import axios from 'axios'
 import { mapState} from 'vuex'
 import * as mainConst from '@/store/mainConst.js'
 import config from '@/config/index.js'
 import storage from '@/utils/storage.js'
 export default{
  data(){
   return {
    funMenu: {
     // 一级菜单
     firstMenu: [],
     // 二级菜单
     nextMenu: [],
     // 三级菜单
     lastMenu: [],
     // 是否显示
     menuIsShow: true
    }
   }
  },
  computed: mapState({
   // 箭头函数可使代码更简练
   funcMenuList: state => state.funcMenuList,
  }),
  methods: {
   // 跳转首页
   goHome(){
    // 跳转首页就关闭iframe
    this.$store.commit(mainConst.M_HIDE_IFRAME)
    this.$router.push(`/${this.$store.state.systemName}`)
   },
   // ★★★★★调用方法获取三级菜单列表★★★★★
   getMainMenu(){
    var _this = this
    if (this.funMenu.firstMenu.length) {
     this.funMenu.menuIsShow = true
    } else {
     if (config.setting.funcMenu) {
      _this.funMenu.firstMenu = storage.getItem('hivescm.userAuthor').menus.funcs
     } else {
      axios.get("data/menu_json.json")
       .then(function (res) {
        _this.funMenu.firstMenu = res.data.result.funcs
       })
     }
    }
   },
   // 点击菜单展开下一级别列表事件
   clickByMenu(e, menuItem, level){
    let menuList = this.funMenu[level]
    switch (level) {
     case "firstMenu": {
      this.funMenu.nextMenu = this.getFirstAndNextVal(menuList, menuItem)
      this.funMenu.lastMenu = []
     }
      break
     case "nextMenu": {
      if (!menuItem.url.length) this.funMenu.lastMenu = this.getFirstAndNextVal(menuList, menuItem)
//      menuItem.url.length "lastMenu": {
      this.clickMenuJump(menuList, menuItem)
     }
      break
    }
   },
   // ★★★★★点击有url的菜单，跳转事件★★★★★
   clickMenuJump(menuList, menuItem){
    if (!menuItem.url.length) return
    this.funMenu.menuIsShow = false
    this.lastmenuChange(menuList, menuItem)
    let iframeTabItem = {}
    // 1、路由跳转和iframe的显示隐藏
    if (menuItem.url.toLowerCase().indexOf("/") != 0 || menuItem.url.toLowerCase().indexOf("/iframe") == 0) {
     // 判断如果是iframe的url,显示iframe
     // 定义一个新的item对象，防止对象的引用
     iframeTabItem = Object.assign({}, menuItem)
     this.$store.commit(mainConst.M_SHOW_IFRAME)
     // 待优化：应该有优化为手动赋值样式
     // （1）、此处利用router-view的特性，让一级tab变颜色
     // （2）、这个还是控制一级tab点击切换tab标签的重要因素
     // 因为原始的iframe的url已经改变，所以要保存到一个新的变量里面，如果已经有了就不需要在放了
     if (!menuItem.iframeUrl) {
      menuItem.iframeUrl = menuItem.url
      let userId = storage.getItem('hivescm.userAuthor').id
      let token = storage.getItem('hivescm.userAuthor').token
      iframeTabItem.url = `${menuItem.url}"clickLastMenu", menuItem)

      if (menuItem.url.toLowerCase().indexOf("/iframe") == 0) {
       // 如果已经iframe中的tab已经存在，那么触发iframe中的切换事件
//       this.$store.commit(mainConst.M_SHOW_IFRAME)
       this.$root.bus.$emit("changeIframeTab", menuItem.url.slice(8))
      }
      return
     }
    }

    // 3、向vuex中添加一级tab
    // 默认是否选中
    menuItem.active = true
    // 向一级tab中添加新的tab标签
    this.$store.commit(mainConst.M_PUSH_NAVTABDATA, menuItem)
    this.$store.commit(mainConst.M_UPDATE_NAVTABDATA, {navIndex: navTabData.length - 1})
    // 向iframe中的tab添加页签
    this.$root.bus.$emit("addIframeTab", iframeTabItem)
   },
   // 清空导航属性值，确保再次点击无选中样式及不匹配数据
   lastmenuChange(menuList, menuItem){
    this.funMenu.firstMenu.forEach(function (item) {
     item.active = false
    })
    this.funMenu.nextMenu.forEach(function (item) {
     item.active = false
    })
    this.funMenu.lastMenu.forEach(function (item) {
     item.active = false
    })
    this.funMenu.nextMenu = []
    this.funMenu.lastMenu = []
   },
   // 增加选中样式及赋值下级菜单
   getFirstAndNextVal(menuList, menuItem){
    var childFuncs = []
    for (let i = 0; i < menuList.length; i++) {
     if (menuList[i].permissionId == menuItem.permissionId) {
      menuList[i].active = true
      childFuncs = menuList[i].childFuncs || []
     } else {
      menuList[i].active = false
     }
    }
    return childFuncs
   }
  }
 }
</script>



还要添加一个没用的路由，因为我们的锚记还要发生变化



/*
 * iframe/router/index.js
 */
const systemNamePrefix = "iframe_"
import MainContainer from '@/containers/MainContainer.vue'
import IframeComponent from '@Iframe/containers/IframeComponent.vue'

export default [
 {
  path: '/iframe',
  component: MainContainer,
  children: [
   {path: ':tag', component: IframeComponent, meta: {requiresAuth: true, keepAlive: true}},
  ],
  meta: {requiresAuth: true}
 }
]






/*
 * iframeComponent.vue，一个没用的vue文件，只是为了让浏览器中的锚记发生变化
 */

<template>
 <div v-if="isCache">
  <span>{{src}}</span>
 </div>
</template>
<style scoped lang="scss">
</style>
<script>
 export default{
  data(){
   return {
    isCache: true,
    src: ''
   }
  },
  created(){
  },
  mounted(){
   // 1、这个页面存在的意义就是在iframe页面切换的时候，路由可以跳转过去用，没有实际大的作用，但是得有这个页面
   // 2、iframe的Tab页面的z-index比这个页面的高
   this.src=this.$route.params.tag
  }
 }
</script>




3. 思考点
虽然这样和iframe结合有点恶心，但是可以实现我们的思路


在这个功能的实现中我们用到了bus事件总线的广播和监听

  
其实这点我们是可以仔细思考的，因为大量的使用广播不可控，我们可以完全用vuex去实现，这点用了广播，确实偷懒了
  
广播并不是不推荐，而是要使用对场景，这点其实用广播确实不太好，不利于扩展，谁能猜出来会有哪些扩展？

大家不用关心具体的代码，如果你们遇到类似的问题，了解这个思路就可以了


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。