Vue + Elementui实现多标签页共存的方法

这个主题，早在一年前就已经创建，也写了一些内容，碍于在应用上体验始终不够完美，一

这个主题，早在一年前就已经创建，也写了一些内容，碍于在应用上体验始终不够完美，一直只存着草稿。

经过多个平台实践，多次迭代，一些功能加了又减了，最后还是回归了最精简的版本，已适用于大部分的场景，若有需要，可自行扩展。

关键逻辑

• 使用 keep-alive 来缓存各标签页
• 通过 vue-router 的 beforeEach 方法来更新标签信息
• 通过 vuex 来保存标签信息
• 通过 vuex 来使关闭页不被缓存

核心代码

定义 vuex 的跨页变量（store/index.js)

import Vuex from 'vuex'
 Vue.use(Vuex)
 export default new Vuex.Store({
 state: {
 worktab: {
 list: [
 {
 name: 'my',
 tabname: '主页',
 path: '/page/my'
 }
 ],
 current: {
 name: 'my',
 tabname: '主页',
 path: '/page/my'
 }
 },
 closingPage: ''
 },
 mutations: {
 worktabRemove (state, p) {
 // 关闭标签
 let ind = state.worktab.list.findIndex(s => s.name === p)
 if (ind > -1) {
 // 清理 keep alive - start
 state.closingPage = state.worktab.list[ind].name
 // 清理 keep alive - end
 state.worktab.list.splice(ind, 1)
 }
 if (p === state.worktab.current.name) {
 // 是当前页，返回上一页
 router.back()
 }
 },
 worktabRoute (state, p) {
 let ind = state.worktab.list.findIndex(s => s.name === p.to.name)
 if (ind > -1) {
 // 标签已存在
 state.worktab.current = state.worktab.list[ind]
 } else {
 // 标签不存在，现在新建
 state.worktab.list.push(p.to)
 state.worktab.current = p.to
 }
 state.closingPage = ''
 }
 },
 actions: {
 worktabRemove ({commit}, p) {
 commit('worktabRemove', p)
 },
 worktabRoute ({commit}, p) {
 commit('worktabRoute', p)
 }
 },
 strict: debug
 })

定义 worktab 标签栏组件，在主容器引用

<template>
 <div class="cp-worktab">
 <el-tabs v-model="activeTab" type="card" @tab-remove="removeTab" @tab-click="clickTab">
 <el-tab-pane
 v-for="t in worktabs"
 :key="t.name"
 :label="t.tabname"
 :name="t.name"
 :closable="t.name !== 'my'"
 >
 </el-tab-pane>
 </el-tabs>
 </div>
 </template>
 <script>
 export default {
 created () {
 // 进来不是主页时等list加载后再更新一次current
 setTimeout(() => {
 this.activeTab = this.$store.state.worktab.current.name
 }, 500)
 },
 watch: {
 '$store.state.worktab.current' (tab) {
 this.activeTab = tab.name
 }
 },
 computed: {
 worktabs () {
 return this.$store.state.worktab.list
 }
 },
 data () {
 return {
 activeTab: 'name'
 }
 },
 methods: {
 clickTab (tab) {
 this.$router.push(this.worktabs[1 * tab.index].path)
 },
 removeTab (name) {
 this.$store.dispatch('worktabRemove', name)
 }
 }
 }
 </script>

路由控制通过beforeEach来更新标签信息

import Vue from 'vue'
 import VueRouter from 'vue-router'
 import store from '@/store'
 import Page from '../components/console/Page.vue'
 import My from '../components/console/My.vue'
 Vue.use(VueRouter)
 // 关联路由与组件
 const routes = [
 {
 name: 'root',
 path: '/'
 },
 {
 path: '/page',
 component: Page,
 children: [
 {
 name: 'my',
 path: 'my',
 component: My,
 meta: {
 tabname: '个人主页'
 }
 }
 ]
 }
 ]
 // 创建路由器
 const router = new VueRouter({
 routes
 })
 router.beforeEach((to, from, next) => {
 next()
 store.dispatch('worktabRoute', {
 to: {
 name: to.name ? to.name : '',
 tabname: (to.meta && to.meta.tabname) ? to.meta.tabname : '',
 path: to.path
 },
 from: {
 name: from.name ? from.name : '',
 tabname: (from.meta && from.meta.tabname) ? from.meta.tabname : '',
 path: from.path
 }
 })
 return
 })
 export default router

主容器通过 closingPage 变量来及时清理关闭页面的缓存

<template>
 <div>
 <cp-worktab></cp-worktab>
 <div class="cp-content">
 <keep-alive :exclude="closingPage">
 <router-view></router-view>
 </keep-alive>
 </div>
 </div>
 </template>
 <script>
 import Worktab from '../module/Worktab'
 export default {
 components: {
 cpWorktab: Worktab
 },
 data () {
 return {}
 },
 computed: {
 closingPage () {
 return this.$store.state.closingPage
 }
 }
 }
 </script>

总结

以上所述是小编给大家介绍的Vue + Elementui实现多标签页共存的方法，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！