Vue管理系统前端之组件拆分封装详解

组件封装

在上一篇记录中，首页中有太多的代码，为了避免代码的臃肿，需要对主要的功能模块拆分，来让代码看起来更简洁，且能进行复用。

拆分后还加了些小功能，加入了修改 title 的代码，修改方式参考vue 动态修改 title。

还增加了当前请求的页面缓存，使用状态管理器处理。监听路由，保存到 state 中，来处理的。 如何监听可参考vue 计算属性和监听属性。

完整效果图如下：

首页布局拆分后结构

拆分后的，布局结构图：

拆分后代码

布局最外层 index 代码，使用头部，侧边栏，主内容栏组成，代码如下：

<!-- 布局的首页 -->
<template>
 <div>
 <l-header></l-header>
 <l-aside></l-aside>
 <l-main></l-main>
 </div>
</template>
<script>
import LHeader from './components/header'
import LAside from './components/aside'
import LMain from './components/main'
export default {
 data() {
 return {}
 },
 //引入组件
 components: {
 LHeader,
 LAside,
 LMain,
 },
}
</script>
<style lang="scss" scoped></style>

头部 index.vue 代码:

<!-- 头部文件 -->
<template>
 <div class="header">
 <!-- logo -->
 <logo></logo>
 <!-- 折叠按钮 -->
 <hamburger></hamburger>
 <!-- 头部导航栏 -->
 <div class="heardNavBar">
 <el-menu default-active="1" class="el-menu-demo" background-color="#4b5f6e" text-color="#fff" active-text-color="#ffd04b" mode="horizontal">
 <el-menu-item index="1" @click="$router.push('/')">首页</el-menu-item>
 <el-menu-item index="2" @click="openUrl('#')">使用文档</el-menu-item>
 <el-menu-item index="3" @click="openUrl('https://github.com/levy-w-wang/lion-ui')">GitHub</el-menu-item>
 </el-menu>
 </div>
 <!-- 右侧信息 -->
 <div style="float:right">
 <!-- 全屏 -->
 <div style="float:left;line-height: 60px; padding: 0 10px;">
 <i class="el-icon-full-screen" @click="toggleFull"></i>
 </div>
 <!-- 个人信息 -->
 <div class="userinfo">
 <el-dropdown trigger="hover">
  <span class="el-dropdown-link userinfo-inner">
  <img src="@assets/img/user.jpg" />
  {{ $store.getters.userInfo.username }}<i class="el-icon-caret-bottom"></i>
  </span>
  <el-dropdown-menu slot="dropdown">
  <el-dropdown-item>
  <router-link to="/"><i class="el-icon-s-home"></i>首页</router-link>
  </el-dropdown-item>
  <el-dropdown-item>
  <router-link to="/"><i class="el-icon-s-custom"></i>我的主页</router-link>
  </el-dropdown-item>
  <el-dropdown-item divided>
  <a @click="loginOut()"><i class="el-icon-switch-button"></i>登出</a>
  </el-dropdown-item>
  </el-dropdown-menu>
 </el-dropdown>
 </div>
 </div>
 </div>
</template>

<script>
import screenfull from 'screenfull'
import hamburger from './hamburger'
import logo from './logo'
// import { mapState } from 'vuex'
export default {
 data() {
 return {}
 },
 computed: {
 // ...mapState({
 // isCollapse: (state) => state.app.isCollapse,
 // }),
 },
 //引入组件
 components: {
 hamburger,
 logo,
 },
 // 方法
 methods: {
 openUrl(url) {
 window.open(url)
 },
 loginOut() {
 this.$confirm('确认退出吗?', '提示', {
 type: 'warning',
 })
 .then(() => {
  this.$store.commit('logout')
 })
 .catch(() => {})
 },
 toggleFull() {
 if (!screenfull.isEnabled) {
 this.$message({
  type: 'warning',
  message: 'you browser can not work',
 })
 return false
 }
 screenfull.toggle()
 },
 },
 //未挂载DOM,不能访问ref为空数组
 //可在这结束loading，还做一些初始化，实现函数自执行,
 //可以对data数据进行操作，可进行一些请求，请求不易过多，避免白屏时间太长。
 created() {},
 //可在这发起后端请求，拿回数据，配合路由钩子做一些事情；可对DOM 进行操作
 mounted() {},
}
</script>

<style lang="scss" scoped>
.header {
 padding-left: 0px !important;
 height: 60px;
 line-height: 60px;
 width: 100%;
 background: #4b5f6e;
 color: #fff;

 .heardNavBar {
 float: left;
 background: #4b5f6e;
 padding: 0px 0px;
 height: 60px;
 line-height: 60px;
 font-size: 28px;
 cursor: pointer;
 }

 .userinfo {
 text-align: right;
 padding-right: 24px;
 float: right;
 padding: 0 10px;
 .userinfo-inner {
 font-size: 20px;
 cursor: pointer;
 color: #fff;
 img {
 width: 40px;
 height: 40px;
 border-radius: 10px;
 margin: 10px 0px 10px 10px;
 float: right;
 }
 }
 }
}
</style>

头部中引用的相关组件代码如下

折叠导航栏 hamburger 下的 index.vue 代码:

<template>
 <div @click="toggleCollapse">
 <svg :class="{ 'is-active': !isCollapse }" class="hamburger" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="64" height="64">
 <path d="M408 442h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8zm-8 204c0 4.4 3.6 8 8 8h480c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8H408c-4.4 0-8 3.6-8 8v56zm504-486H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zm0 632H120c-4.4 0-8 3.6-8 8v56c0 4.4 3.6 8 8 8h784c4.4 0 8-3.6 8-8v-56c0-4.4-3.6-8-8-8zM142.4 642.1L298.7 519a8.84 8.84 0 0 0 0-13.9L142.4 381.9c-5.8-4.6-14.4-.5-14.4 6.9v246.3a8.9 8.9 0 0 0 14.4 7z" />
 </svg>
 </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
 name: 'Hamburger',
 computed: {
 ...mapState({
 isCollapse: (state) => state.app.isCollapse,
 }),
 },
 methods: {
 //折叠导航栏
 toggleCollapse: function () {
 this.$store.commit('toggleCollapse')
 },
 },
}
</script>

<style scoped>
.hamburger {
 padding-left: 13px;
 padding-right: 13px;
 text-align: center;
 width: 34px;
 height: 60px;
 line-height: 60px;
 float: left;
 cursor: pointer;
}

.is-active {
 transform: rotate(180deg);
}
</style>

折叠导航栏 logo 下的 index.vue 代码:

<!-- -->
<template>
 <div class="logo" :class="isCollapse ? 'logo-collapse-width' : 'logo-width'">
 <img v-if="isCollapse" src="@assets/logo6065.png" @click="$router.push('/')" />
 <img v-else src="@assets/logo.png" @click="$router.push('/')" />
 </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
 data() {
 return {}
 },
 computed: {
 ...mapState({
 isCollapse: (state) => state.app.isCollapse,
 }),
 },
}
</script>
<style lang="scss" scoped>
.logo {
 float: left;
 height: 60px;
 padding: 0;
 margin: 0;
}
.logo-width {
 width: 230px;
}
.logo-collapse-width {
 width: 65px;
}
</style>

侧边栏下的 index.vue代码:

<!-- aside -->
<template>
 <div class="aside-container" :class="isCollapse ? 'aside-collapse-width' : 'aside-width'">
 <!--导航菜单 default-active="1-1"-->
 <el-menu class="el-menu-vertical-demo" :class="isCollapse ? 'aside-collapse-width' : 'aside-width'" :collapse-transition="false" :unique-opened="true" :collapse="isCollapse">
 <el-submenu index="1">
 <template slot="title">
  <i class="el-icon-setting"></i>
  <span slot="title">系统管理</span>
 </template>
 <el-menu-item index="1-1" @click="$router.push('usermanage')">用户管理</el-menu-item>
 <el-menu-item index="1-2" @click="$router.push('menumanage')">菜单管理</el-menu-item>
 </el-submenu>
 <el-menu-item index="2" disabled>
 <i class="el-icon-magic-stick"></i>
 <span slot="title">导航一</span>
 </el-menu-item>
 <el-menu-item index="3" disabled>
 <i class="el-icon-reading"></i>
 <span slot="title">导航二</span>
 </el-menu-item>
 </el-menu>
 </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
 data() {
 return {}
 },
 //$store.getters.isCollapse
 computed: {
 ...mapState({
 isCollapse: (state) => state.app.isCollapse,
 }),
 mainTabs: {
 get() {
 return this.$store.state.app.mainTabs
 },
 set(val) {
 this.$store.commit('updateMainTabs', val)
 },
 },
 mainTabsActiveName: {
 get() {
 return this.$store.state.app.mainTabsActiveName
 },
 set(val) {
 this.$store.commit('updateMainTabsActiveName', val)
 },
 },
 },
 watch: {
 $route: 'handleRoute',
 },
 created() {
 console.log(this.$route)
 this.handleRoute(this.$route)
 },
 methods: {
 // 路由操作处理
 handleRoute(route) {
 // tab标签页选中, 如果不存在则先添加
 var tab = this.mainTabs.filter((item) => item.name === route.name)[0]
 if (!tab) {
 tab = {
  name: route.name,
  title: route.meta.title,
  icon: route.meta.icon,
 }
 this.mainTabs = this.mainTabs.concat(tab)
 }
 this.mainTabsActiveName = tab.name
 },
 },
}
</script>
<style lang="scss" scoped>
.aside-container {
 position: fixed;
 top: 0px;
 left: 0;
 bottom: 0;
 z-index: 1020;
 .el-menu {
 position: absolute;
 top: 60px;
 bottom: 0px;
 text-align: left;
 }
}
.aside-width {
 width: 230px;
}
.aside-collapse-width {
 width: 65px;
}
</style>

内容模块下的 index.vue代码:

<!-- -->
<template>
 <div class="main-container clear" :class="isCollapse ? 'position-collapse-left' : 'position-left'">
 <!-- 标签页 -->
 <el-tabs class="tabs" :class="isCollapse ? 'position-collapse-left' : 'position-left'" v-model="mainTabsActiveName" :closable="true" type="card" @tab-click="selectedTabHandle" @tab-remove="removeTabHandle">
 <el-dropdown class="tabs-tools" :show-timeout="0" trigger="hover">
 <div style="font-size:20px;width:50px;">
  <i class="el-icon-arrow-down"></i>
 </div>
 <el-dropdown-menu slot="dropdown">
  <el-dropdown-item @click.native="tabsCloseCurrentHandle">关闭当前标签</el-dropdown-item>
  <el-dropdown-item @click.native="tabsCloseOtherHandle">关闭其它标签</el-dropdown-item>
  <el-dropdown-item @click.native="tabsCloseAllHandle">关闭全部标签</el-dropdown-item>
  <el-dropdown-item @click.native="tabsRefreshCurrentHandle">刷新当前标签</el-dropdown-item>
 </el-dropdown-menu>
 </el-dropdown>
 <el-tab-pane v-for="item in mainTabs" :key="item.name" :label="item.title" :name="item.name">
 <span slot="label"> <i :class="item.icon"></i> {{ item.title }} </span>
 </el-tab-pane>
 </el-tabs>

 <!-- 主内容区域 -->
 <div class="main-content">
 <keep-alive>
 <transition name="fade" mode="out-in">
  <router-view></router-view>
 </transition>
 </keep-alive>
 </div>
 </div>
</template>

<script>
import { mapState } from 'vuex'
export default {
 data() {
 return {}
 },
 computed: {
 ...mapState({
 isCollapse: (state) => state.app.isCollapse,
 }),
 mainTabs: {
 get() {
 return this.$store.state.app.mainTabs
 },
 set(val) {
 this.$store.commit('updateMainTabs', val)
 },
 },
 mainTabsActiveName: {
 get() {
 return this.$store.state.app.mainTabsActiveName
 },
 set(val) {
 this.$store.commit('updateMainTabsActiveName', val)
 },
 },
 },
 methods: {
 // tabs, 选中tab
 selectedTabHandle(tab) {
 tab = this.mainTabs.filter((item) => item.name === tab.name)
 if (tab.length >= 1) {
 this.$router.push({ name: tab[0].name })
 }
 },
 // tabs, 删除tab
 removeTabHandle(tabName) {
 // 当只有首页时，不允许关掉。 若是其它页面可关掉后，push 首页进去
 if (this.mainTabs.length == 1 && this.mainTabs[0].name == 'index') {
 return
 }
 this.mainTabs = this.mainTabs.filter((item) => item.name !== tabName)
 if (this.mainTabs.length >= 1) {
 // 当前选中tab被删除
 if (tabName === this.mainTabsActiveName) {
  this.$router.push({ name: this.mainTabs[this.mainTabs.length - 1].name }, () => {
  this.mainTabsActiveName = this.$route.name
  })
 }
 } else {
 this.$router.push('/')
 }
 },
 // tabs, 关闭当前
 tabsCloseCurrentHandle() {
 this.removeTabHandle(this.mainTabsActiveName)
 },
 // tabs, 关闭其它
 tabsCloseOtherHandle() {
 this.mainTabs = this.mainTabs.filter((item) => item.name === this.mainTabsActiveName)
 },
 // tabs, 关闭全部
 tabsCloseAllHandle() {
 this.mainTabs = []
 this.$router.push('/')
 },
 // tabs, 刷新当前
 tabsRefreshCurrentHandle() {
 var tempTabName = this.mainTabsActiveName
 this.removeTabHandle(tempTabName)
 this.$nextTick(() => {
 this.$router.push({ name: tempTabName })
 })
 },
 },
}
</script>
<style lang="scss" scoped>
.main-container {
 padding: 0 5px 5px;
 position: absolute;
 top: 60px;
 left: 1px;
 right: 1px;
 bottom: 0px;
 .tabs {
 position: fixed;
 top: 60px;
 right: 50px;
 padding-left: 0px;
 padding-right: 2px;
 z-index: 1020;
 height: 40px;
 line-height: 40px;
 font-size: 14px;
 background: rgb(255, 253, 255);
 border-color: rgba(200, 206, 206, 0.5);
 // border-left-width: 1px;
 // border-left-style: solid;
 border-bottom-width: 1px;
 border-bottom-style: solid;
 }
 .tabs-tools {
 position: fixed;
 top: 60px;
 right: 0;
 z-index: 1020;
 height: 40px;
 // padding: 0 10px;
 font-size: 14px;
 line-height: 40px;
 cursor: pointer;
 border-color: rgba(200, 206, 206, 0.5);
 border-left-width: 1px;
 border-left-style: solid;
 border-bottom-width: 1px;
 border-bottom-style: solid;
 background: rgba(255, 255, 255, 1);
 }
 .tabs-tools:hover {
 background: rgba(200, 206, 206, 1);
 }
 .main-content {
 position: absolute;
 top: 45px;
 left: 5px;
 right: 5px;
 bottom: 5px;
 padding: 5px;
 // background: rgba(209, 212, 212, 0.5);
 }
}
.position-left {
 left: 230px;
}
.position-collapse-left {
 left: 65px;
}
</style>

状态管理中添加 app 模块

代码如下：

export default {
 state: {
 // 是否折叠导航栏
 isCollapse: false,
 // 访问页集合
 mainTabs: [],
 // 当前访问页名
 mainTabsActiveName: '',
 },
 getters: {
 isCollapse: (state) => {
 return state.isCollapse
 },
 },
 mutations: {
 toggleCollapse(state) {
 state.isCollapse = !state.isCollapse
 },
 updateMainTabs(state, tabs) {
 state.mainTabs = tabs
 },
 updateMainTabsActiveName(state, name) {
 state.mainTabsActiveName = name
 },
 },
 actions: {},
}

当然还有一些小的调整点，可参考 git 上的提交版本 首页组件拆分

总结

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