本文小编为大家详细介绍“ElementUI命名视图怎么实现复杂顶部和左侧导航栏”，内容详细，步骤清晰，细节处理妥当，希望这篇“ElementUI命名视图怎么实现复杂顶部和左侧导航栏”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
项目目录如下：
router配置（router/index.js）如下：
import Vue from 'vue'import Router from 'vue-router'import TopNav from '@/components/nav/topNav.vue'import LeftNav from '@/components/nav/leftNav.vue'import Home from '@/views/home.vue'import Dashboard from '@/views/workbench/dashboard.vue'import MySettings from '@/views/workbench/mySettings.vue'import Mission from '@/views/workbench/mission/mission.vue'import Plan from '@/views/workbench/plan.vue'import Maillist from '@/views/workbench/maillist.vue'import EnterpriseList from '@/views/enterprise/index.vue'import EnterpriseAdd from '@/views/enterprise/add.vue'import EnterpriseDetail from '@/views/enterprise/detail.vue'import EnterpriseValidate from '@/views/enterprise/validate.vue'import VehicleManage from '@/views/vehicle/index.vue'import DeptManager from '@/views/dept/index.vue'Vue.use(Router)let router = new Router({ routes: [ { path: '/', type: 'home', // 根据type区分不同模块（顶部导航） name: 'home', // 根据name区分不同子模块（左侧导航） redirect: '/dashboard', component: Home, children: [ { path: '/dashboard', name: '首页', // 当前路由的name（导航栏显示文字） components: { default: Dashboard, top: TopNav, aside: LeftNav }, leaf: true, // 只有一个节点 iconCls: 'iconfont icon-home', // 图标样式class menuShow: true }, { path: '/mySet', components: { default: MySettings, top: TopNav, aside: LeftNav }, name: '我的设置', iconCls: 'el-icon-menu', menuShow: true, children: [ { path: '/mySet/plan', component: Plan, name: '行程计划', menuShow: true }, { path: '/mySet/mission', component: Mission, name: '我的任务', menuShow: true }, { path: '/mySet/maillist', component: Maillist, name: '通讯录', menuShow: true } ] } ] }, { path: '/enterpriseManager', type: 'enterprise', name: 'enterprise', component: Home, redirect: '/enterprise/list', menuShow: true, children: [ { path: '/enterprise/list', name: '企业信息', components: { default: EnterpriseList, top: TopNav, aside: LeftNav }, leaf: true, iconCls: 'el-icon-setting', menuShow: true }, { path: '/enterprise/detail', name: '企业详情', components: { default: EnterpriseDetail, top: TopNav, aside: LeftNav }, leaf: true, iconCls: 'el-icon-setting', menuShow: false }, { path: '/enterprise/add', name: '添加企业', components: { default: EnterpriseAdd, top: TopNav, aside: LeftNav }, leaf: true, iconCls: 'el-icon-menu', menuShow: true }, { path: '/enterprise/validate', name: '企业认证', components: { default: EnterpriseValidate, top: TopNav, aside: LeftNav }, leaf: true, iconCls: 'el-icon-menu', menuShow: true } ] }, { path: '/vehicleManager', type: 'enterprise', name: 'vehicle', component: Home, redirect: '/vehicle/list', menuShow: true, children: [ { path: '/vehicle/list', name: '车辆信息', components: { default: VehicleManage, top: TopNav, aside: LeftNav }, leaf: true, // 只有一个节点 iconCls: 'iconfont icon-home', // 图标样式class menuShow: true } ] }, { path: '/deptManager', type: 'enterprise', name: 'dept', component: Home, redirect: '/dept/list', menuShow: true, children: [ { path: '/dept/list', name: '部门信息', components: { default: DeptManager, top: TopNav, aside: LeftNav }, leaf: true, // 只有一个节点 iconCls: 'iconfont icon-home', // 图标样式class menuShow: true } ] } ]});特别说明：
这里的路由对象router ，设置的是最多三级，一级路由主要对应的是顶部导航和其他无子页面的路由，二级和三级路由分别对应的是左侧导航的一级和二级菜单（比如三级路由对应的就是左侧导航的二级菜单），二级路由设置leaf属性，值为true表明该路由下没有子菜单（如果该路由下的某页面不显示在左侧导航，不算子菜单）。
home.vue，这里分别有name=top,aside,default三个视图，top代表顶部导航，aside代表左侧导航，剩下的default就是默认视图，代表右侧内容区
<template> <el-row class="container"> <!--头部--> <el-col :span="24"><router-view name="top"></router-view></el-col> <el-col :span="24" class="main"> <!--左侧导航--> <router-view name="aside"></router-view> <!--右侧内容区--> <section class="content-container"> <div class="grid-content bg-purple-light"> <el-col :span="24" class="content-wrapper"> <transition name="fade" mode="out-in"> <router-view></router-view> </transition> </el-col> </div> </section> </el-col> </el-row></template><script> export default { name: 'home', data () { return { loading: false } } }</script>topNav.vue 是顶部导航菜单的代码
<template> <el-row class="container"> <!--头部--> <el-col :span="24" class="topbar-wrap"> <div class="topbar-logo topbar-btn"> <a href="/" rel="external nofollow" rel="external nofollow" ><img src="../../assets/logo.png" ></a> </div> <div class="topbar-logos"> <a href="/" rel="external nofollow" rel="external nofollow" >车车综合管理</a> </div> <div class="topbar-title"> <!-- 注意：这里就是topNavState作用之处，根据当前路由所在根路由的type值判断显示不同顶部导航菜单 --> <el-row v-show="$store.state.topNavState==='home'"> <el-col :span="24"> <el-menu :default-active="defaultActiveIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect" :router="true"> <el-menu-item index="/">工作台</el-menu-item> <el-menu-item index="/enterpriseManager">企业管理</el-menu-item> <el-menu-item index="/orderManager">订单管理</el-menu-item> <el-menu-item index="/systemManager">系统管理</el-menu-item> </el-menu> </el-col> </el-row> <el-row v-show="$store.state.topNavState==='enterprise'"> <el-col :span="24"> <el-menu :default-active="defaultActiveIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect" :router="true"> <el-menu-item index="/enterpriseManager">企业信息</el-menu-item> <el-menu-item index="/vehicleManager">车辆信息</el-menu-item> <el-menu-item index="/deptManager">组织架构</el-menu-item> </el-menu> </el-col> </el-row> </div> <div class="topbar-account topbar-btn"> <el-dropdown trigger="click"> <span class="el-dropdown-link userinfo-inner"> <i class="iconfont icon-user"></i> {{nickname}} <i class="el-icon-caret-bottom"></i></span> <el-dropdown-menu slot="dropdown"> <el-dropdown-item> <div @click="jumpTo('/user/profile')"><span >个人信息</span></div> </el-dropdown-item> <el-dropdown-item> <div @click="jumpTo('/user/changepwd')"><span >修改密码</span></div> </el-dropdown-item> <el-dropdown-item divided @click.native="logout">退出登录</el-dropdown-item> </el-dropdown-menu> </el-dropdown> </div> </el-col> </el-row></template><script> import 'element-ui/lib/theme-chalk/display.css'; import {road} from '../../road.js' export default { data(){ return { loading: false, companyName: '', nickname: '', defaultActiveIndex: '/', homeMenu: false, messageCount: 5 } }, created() { road.$on('setNickName', (text) => { this.nickname = text; }); road.$on('goto', (url) => { if(url === "/login") { localStorage.removeItem('access-user'); this.$router.push(url); } }); // 组件创建完后获取数据 this.fetchNavData(); }, methods: { jumpTo(url){ this.$router.push(url); //用go刷新 }, handleSelect(index){ this.defaultActiveIndex = index; }, fetchNavData () { // 初始化菜单激活项 let cur_path = this.$route.path; //获取当前路由 let routers = this.$router.options.routes; // 获取路由对象 let nav_type = "", nav_name = ""; for (var i = 0; i < routers.length; i++) { let children = routers[i].children; if(children){ for (let j = 0; j < children.length; j++) { if (children[j].path === cur_path) { nav_type = routers[i].type; nav_name = routers[i].name; break; } // 如果该菜单下还有子菜单 if(children[j].children) { let grandChildren = children[j].children; for(let z=0; z<grandChildren.length; z++) { if(grandChildren[z].path === cur_path) { nav_type = routers[i].type; nav_name = routers[i].name; break; } } } } } } this.$store.state.topNavState = nav_type; this.$store.state.leftNavState = nav_name; if(nav_type == "home"){ this.defaultActiveIndex = "/"; } else { this.defaultActiveIndex = "/" + nav_name + "Manager"; } }, logout(){ //logout this.$confirm('确认退出吗?', '提示', { confirmButtonClass: 'el-button--warning' }).then(() => { //确认 localStorage.removeItem('access-user'); road.$emit('goto', '/login'); }).catch(() => {}); } }, mounted() { let user = window.localStorage.getItem('access-user'); if (user) { user = JSON.parse(user); this.nickname = user.nickname || ''; this.companyName = user.companyName || ''; } }, watch: { '$route': function(to, from){ // 路由改变时执行 //console.info("to.path:" + to.path); this.fetchNavData(); } } }</script>注意fetchNavData()这个方法，主要是根据当前跳转的路由，去找到这个路由对应的type（对应顶部导航栏的分类）和name（对应左侧导航栏的分类），然后保存type和name到$store中，这样在topNav.vue组件可以根据$store中的type显示相应的菜单，同样在leftNav.vue组件就可以取到这个name值并显示相应的左侧菜单栏了。另外，里面的top和aside是命名视图，分别对应顶部导航组件和左侧导航组件。
补充：topNavState和leftNavState这两个状态就是精髓所在，分别控制顶部和左侧导航展示对应模块菜单，这两个状态是在vuex配置文件store.js中设置的
import Vue from 'vue'import Vuex from 'vuex'Vue.use(Vuex)const state = { collapsed: false, // 左侧导航折叠状态 topNavState: 'home', leftNavState: 'dispatch'}export default new Vuex.Store({ state})store.js文件在main.js中引入：
import store from './store.js'new Vue({ router, store, el: '#app', render: h => h(App)})leftNav.vue 左侧导航栏（这里的左侧菜单栏最多有两级菜单）
<template> <!--左侧导航--> <aside :class="{showSidebar:!collapsed}"> <!--展开折叠开关--> <div class="menu-toggle" @click.prevent="collapse"> <i class="iconfont icon-outdent" v-show="!collapsed" title="收起"></i> <i class="iconfont icon-indent" v-show="collapsed" title="展开"></i> </div> <!--导航菜单--> <el-menu :default-active="$route.path" router :collapse="collapsed" ref="leftNavigation"> <template v-for="(issue,index) in $router.options.routes"> <!-- 注意：这里就是leftNavState状态作用之处，当该值与router的根路由的name相等时加载相应菜单组 --> <template v-if="issue.name === $store.state.leftNavState"> <template v-for="(item,index) in issue.children"> <el-submenu v-if="!item.leaf" :index="index+''" v-show="item.menuShow"> <template slot="title"><i :class="item.iconCls"></i><span slot="title">{{item.name}}</span></template> <el-menu-item v-for="term in item.children" :key="term.path" :index="term.path" v-if="term.menuShow" :class="$route.path==term.path?'is-active':''"> <i :class="term.iconCls"></i><span slot="title">{{term.name}}</span> </el-menu-item> </el-submenu> <el-menu-item v-else-if="item.leaf" :index="item.path" :class="$route.path==item.path?'is-active':''" v-show="item.menuShow"> <i :class="item.iconCls"></i><span slot="title">{{item.name}}</span> </el-menu-item> </template> </template> </template> </el-menu> </aside></template><script> export default { name: 'leftNav', data () { return { loading: false, collapsed: this.$store.state.collapsed, } }, methods: { //折叠导航栏 collapse: function () { this.collapsed = !this.collapsed; this.$store.state.collapsed = this.collapsed; }, // 左侧导航栏根据当前路径默认打开子菜单（如果当前是二级菜单，则父级子菜单默认打开） defaultLeftNavOpened () { let cur_path = this.$route.path; //获取当前路由 let routers = this.$router.options.routes; // 获取路由对象 let subMenuIndex = '', needOpenSubmenu = false; for (let i = 0; i < routers.length; i++) { let children = routers[i].children; if(children){ for (let j = 0; j < children.length; j++) { if(children[j].path === cur_path) { break; } // 如果该菜单下还有子菜单 if(children[j].children && !children[j].leaf) { let grandChildren = children[j].children; for(let z=0; z<grandChildren.length; z++) { if(grandChildren[z].path === cur_path) { subMenuIndex = j; needOpenSubmenu = true; break; } } } } } } if(this.$refs['leftNavigation'] && needOpenSubmenu) { this.$refs['leftNavigation'].open(subMenuIndex); // 打开子菜单 } }, }, watch: { '$route': function(to, from){ // 路由改变时执行 //console.info("to.path:" + to.path); } }, mounted() { this.defaultLeftNavOpened(); }, }</script>如果左侧导航含有二级菜单，
比如“我的设置（/mySet）”中，含有三个子菜单：
路由配置如下：(具体文件路径及配置请看router/index.js)
{ path: '/mySet', components: { default: MySettings, top: TopNav, aside: LeftNav }, name: '我的设置', iconCls: 'el-icon-menu', menuShow: true, children: [ { path: '/mySet/plan', component: Plan, name: '行程计划', menuShow: true }, { path: '/mySet/mission', component: Mission, name: '我的任务', menuShow: true }, { path: '/mySet/maillist', component: Maillist, name: '通讯录', menuShow: true } ] }此时，我们只需在父级菜单对应视图（MySettings）中添加一个router-view即可：
<template> <router-view></router-view></template>整体效果图：
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