vue之tab的变化

state.js

 options: [],//存放tab页的容器
  activeIndex: '',////激活的tab页路由路径
  showName: 'show',//tab页的标题
  role: ""//用来区分是否是因为左侧菜单被点击造成的路由路径发生改变，是：pass；不是：nopass

getters.js

getShowName:(state) => {
  		return state.showName;
  	},
  	getOptions:(state) => {
  		return state.options;
  	},
  	getRole:(state) =>{
  		return state.role;
  	}

mutations.js

// 添加tabs（data包含了路由路径跟tab页名字）
	add_tabs(state, data) {
		this.state.options.push(data);
	},
	// 删除tabs	（route是路由路径）
	delete_tabs(state, route) {
		let index = 0;
		for (let option of state.options) {
			if (option.route === route) {
				break;
			}
			index++;
		}
		this.state.options.splice(index, 1); //删除options里面下标为Index的一个数
	},
	// 设置当前激活的tab
	set_active_index(state, index) {
		this.state.activeIndex = index;
	},
	//设置tab页显示标题
	set_showName(state, name) {
		this.state.showName = name;
	},
	set_role(state, role) {
		this.state.role = role;
	}

中心主体AppMain.vue（核心代码在此处）

<template>
	<el-container class="main-container">
		<el-aside v-bind:class="asideClass">
			<LeftNav></LeftNav>
		</el-aside>
		<el-container>
			<el-header class="main-header">
				<TopNav></TopNav>
			</el-header>
			<div class="template-tabs">
				<el-tabs v-model="activeIndex" type="border-card" closable @tab-click="tabClick" @tab-remove="tabRemove">
					<el-tab-pane :key="item.name" v-for="(item, index) in options" :label="item.name" :name="item.route">
					</el-tab-pane>
				</el-tabs>
			</div>
			<el-main class="main-center">
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
	// 导入组件
	import TopNav from '@/components/TopNav.vue'
	import LeftNav from '@/components/LeftNav.vue'

	// 导出模块
	export default {
		data(){
			return {
				asideClass:'main-aside'
			}
		},
		components: {
			TopNav,LeftNav
		},
		created(){//钩子函数 对值重新进行渲染
			//获取Bus里存的值
			this.$root.Bus.$on('collapsed-side-click',(v)=>{
				this.asideClass=v? 'main-aside-collapsed' : 'main-aside'
			})
		},
		methods: {
            // tab切换时，动态的切换路由
            tabClick(tab) {
							 // v-model="activeIndex"是路由路径
                let path = this.activeIndex;
                this.$router.push({ path: path });
								this.$store.commit('set_role',"nopass");
            },
            tabRemove(targetName) {
							// console.log(targetName);targetName是路由路径
								this.$store.commit('set_role',"nopass");
							  // let tabs = this.editableTabs;
                this.$store.commit('delete_tabs', targetName);
								// 如果激活tab页被关闭，那么需要激活别的tab页，最后一个tab页被关闭，那么跳转主界面
                if (this.activeIndex === targetName) {
					// 设置当前激活的路由
                    if (this.options && this.options.length >= 1) {
                        this.$store.commit('set_active_index', this.options[this.options.length - 1].route);
                        this.$router.push({ path: this.activeIndex });
                    } 
					   else {
                        this.$router.push({ path: '/AppMain' });
                    }
                }
            }
        },
		 watch: {
			'$route'(to) {
				// 只要路由发生改变，就会触发此事件（点击左侧菜单时会触发，删除右侧tab页会触发，切换右侧已存在的tab页会触发）
						let role=this.$store.state.role;
						let showName=this.$store.getters.getShowName
						let flag = false;//判断是否页面中是否已经存在该路由下的tab页
						//options记录当前页面中已存在的tab页
						for (let option of this.options) {
						//用名称匹配，如果存在即将对应的tab页设置为active显示桌面前端
							if (option.name === showName) {
								flag = true;
								this.$store.commit('set_active_index',  to.path);
								break;
							}
						}
						//如果不存在，则新增tab页，再将新增的tab页设置为active显示在桌面前端
						// if(role!='nopass'){}
						if(role=='pass'){
							if (!flag) {
								this.$store.commit('add_tabs', { route: to.path, name: showName});
								this.$store.commit('set_active_index',  to.path);
							}
						}
			}
		},
		computed: {
			options() {
				return this.$store.state.options;
			},
			//动态设置及获取当前激活的tab页
			activeIndex: {
				get() {
					return this.$store.state.activeIndex;
				},
				set(val) {
					this.$store.commit('set_active_index', val);
				}
			}
		}
	};
</script>
<style type="text/css">
	.el-tabs--border-card>.el-tabs__content {
		padding: 0px;
	}
</style>
<style scoped>
	.main-container {
		height: 100%;
		width: 100%;
		box-sizing: border-box;
	}

	.main-aside-collapsed {
		/* 在CSS中，通过对某一样式声明! important ，可以更改默认的CSS样式优先级规则，使该条样式属性声明具有最高优先级 */
		width: 64px !important;
		height: 100%;
		background-color: #334157;
		margin: 0px;
	}

	.main-aside {
		width: 240px !important;
		height: 100%;
		background-color: #334157;
		margin: 0px;
	}

	.main-header,
	.main-center {
		padding: 0px;
		border-left: 2px solid #333;
	}
</style>

左侧菜单LeftNav.vue

<template>
	<el-menu router :default-active="$route.path" default-active="2" class="el-menu-vertical-demo" background-color="#334157" text-color="#fff"
	 active-text-color="#ffd04b" :collapse="collapsed">
		<!-- <el-menu default-active="2" :collapse="collapsed" collapse-transition router :default-active="$route.path" unique-opened class="el-menu-vertical-demo" background-color="#334157" text-color="#fff" active-text-color="#ffd04b"> -->
		<div class="logobox">
			<img class="logoimg" src="../assets/img/logo.png" alt="">
		</div>
		<el-submenu :key="'id_'+m.treeNodeId" :index="'id_'+m.treeNodeId" v-for="m in menus">
			<template slot="title">
				<i :class="m.icon"></i>
				<span>{{m.treeNodeName}}</span>
			</template>
			<el-menu-item :key="'id_'+m2.treeNodeId" :index="m2.url" @click="showName(m2.treeNodeName)" v-for="m2 in m.children">
				<template slot="title">
					<i :class="m2.icon"></i>
					<span>{{m2.treeNodeName}}</span>
				</template>
			</el-menu-item>
		</el-submenu>

	</el-menu>
</template>
<script>
	export default {
		data() {
			return {
				//默认不折叠
				collapsed: false,
				menus:[]
			}
		},
		created() {
			// v就是从Vue总线Bus获取的变量值
			this.$root.Bus.$on('collapsed-side-click', (v) => {
				this.collapsed = v;
			});
			// 左侧树形菜单加载
			let url = this.axios.urls.SYSTEM_MENU_TREE;
			this.axios.post(url, this.ruleForm).then((response) => {
				console.log(response);
				this.menus = response.data.result;

			}).catch(function(error) {
				console.log(error);
			});
		},
		methods: {
			showName(name) {
				// 把菜单名称放进去，当成tab页的名称
				this.$store.commit('set_showName', name);
				this.$store.commit('set_role', "pass");
			}
		}
	}
</script>
<style>
	.el-menu-vertical-demo:not(.el-menu--collapse) {
		width: 240px;
		min-height: 400px;
	}

	.el-menu-vertical-demo:not(.el-menu--collapse) {
		border: none;
		text-align: left;
	}

	.el-menu-item-group__title {
		padding: 0px;
	}

	.el-menu-bg {
		background-color: #1f2d3d !important;
	}

	.el-menu {
		border: none;
	}

	.logobox {
		height: 40px;
		line-height: 40px;
		color: #9d9d9d;
		font-size: 20px;
		text-align: center;
		padding: 20px 0px;
	}

	.logoimg {
		height: 40px;
	}
</style>

评论管理Comment.vue

<template>
	<div>
		<el-tabs :tab-position="tabPosition" style="height: 200px;">
			<el-tab-pane label="游客评论">游客评论管理</el-tab-pane>
			<el-tab-pane label="普通会员评论">普通会员评论管理</el-tab-pane>
			<el-tab-pane label="VIP会员评论">VIP会员评论管理</el-tab-pane>
			<el-tab-pane label="SVIP会员评论">SVIP会员评论管理</el-tab-pane>
		</el-tabs>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				tabPosition: '评论管理'
			};
		}
	}
</script>

<style>

</style>

路由配置

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import AppMain from '@/components/AppMain'
import Articles from '@/views/sys/Articles'
import Login from '@/views/Login'
import VuexPage1 from '@/views/sys/VuexPage1'
import VuexPage2 from '@/views/sys/VuexPage2'
import Comment from '@/views/sys/Comment'

Vue.use(Router)

export default new Router({
	routes: [{
			path: '/',
			name: 'Login',
			component: Login
		},
		{
			path: '/Login',
			name: 'Login',
			component: Login
		},
		{
			path: '/AppMain',
			name: 'AppMain',
			component: AppMain,
			children: [{
				path:'/sys/Articles',
				name:'/Articles',
				component:Articles

			},{
				path:'/sys/VuexPage1',
				name:'/VuexPage1',
				component:VuexPage1
			},{
				path:'/sys/VuexPage2',
				name:'/VuexPage2',
				component:VuexPage2
			},{
				path:'/sys/Comment',
				name:'/Comment',
				component:Comment
			}
			]
		}
	]
})

效果展示