如何在vue项目中使用递归组件配合Element-ui布局侧边栏

在我们整体的项目开发中，对项目框架的整体布局是非常重要的一环，其中侧边栏会涉及到一级一级嵌套以及项目迭代的问题，而且还涉及到路由的问题，所以用树形结构显然不合适，我们需要考虑迭代的问题，所以我们选择用递归组件对侧边栏进行布局，新增菜单只需要在数据层添加即可，可以无极限嵌套菜单级别，而达到了一劳永逸的效果。

首先我们需要有自己侧边栏的数据（前端自己写静态数据或从后台获取）：

data.js:

[code]export const data1={
"list": [
{
"entity": {
"id": 1,
"parentMenuId": 0,
"name": "systemManage",
"icon": "el-icon-message\r\n",
"alias": "系统管理",
"state": "ENABLE",
"sort": 0,
"value": null,
"type": "NONE",
"discription": "用于系统管理的菜单",
"createUserId": 1
},
"childs": [
{
"entity": {
"id": 3,
"parentMenuId": 1,
"name": "authManage",
"icon": "el-icon-loading",
"alias": "权限管理",
"state": "ENABLE",
"sort": 0,
"value": "/system/auth",
"type": "LINK",
"discription": "用于权限管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 4,
"parentMenuId": 1,
"name": "roleManage",
"icon": "el-icon-bell",
"alias": "角色管理",
"state": "ENABLE",
"sort": 1,
"value": "/system/role",
"type": "LINK",
"discription": "用于角色管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 2,
"parentMenuId": 1,
"name": "menuManage",
"icon": "el-icon-edit",
"alias": "菜单管理",
"state": "ENABLE",
"sort": 2,
"value": "/system/menu",
"type": "LINK",
"discription": "用于菜单管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 5,
"parentMenuId": 1,
"name": "groupManage",
"icon": "el-icon-mobile-phone\r\n",
"alias": "分组管理",
"state": "ENABLE",
"sort": 3,
"value": "/system/group",
"type": "LINK",
"discription": "用于分组管理的菜单",
"createUserId": 1
},
"childs": null
}
]
},
{
"entity": {
"id": 6,
"parentMenuId": 0,
"name": "userManage",
"icon": "el-icon-news",
"alias": "用户管理",
"state": "ENABLE",
"sort": 1,
"value": null,
"type": "NONE",
"discription": "用于用户管理的菜单",
"createUserId": 1
},
"childs": [
{
"entity": {
"id": 7,
"parentMenuId": 6,
"name": "accountManage",
"icon": "el-icon-phone-outline\r\n",
"alias": "帐号管理",
"state": "ENABLE",
"sort": 0,
"value": "",
"type": "NONE",
"discription": "用于帐号管理的菜单",
"createUserId": 1
},
"childs": [
{
"entity": {
"id": 14,
"parentMenuId": 7,
"name": "emailManage",
"icon": "el-icon-sold-out\r\n",
"alias": "邮箱管理",
"state": "ENABLE",
"sort": 0,
"value": "/content/email",
"type": "LINK",
"discription": "用于邮箱管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 13,
"parentMenuId": 7,
"name": "passManage",
"icon": "el-icon-service\r\n",
"alias": "密码管理",
"state": "ENABLE",
"sort": 1,
"value": "/content/pass",
"type": "LINK",
"discription": "用于密码管理的菜单",
"createUserId": 1
},
"childs": null
}
]
},
{
"entity": {
"id": 8,
"parentMenuId": 6,
"name": "integralManage",
"icon": "el-icon-picture",
"alias": "积分管理",
"state": "ENABLE",
"sort": 1,
"value": "/user/integral",
"type": "LINK",
"discription": "用于积分管理的菜单",
"createUserId": 1
},
"childs": null
}
]
},
{
"entity": {
"id": 9,
"parentMenuId": 0,
"name": "contentManage",
"icon": "el-icon-rank",
"alias": "内容管理",
"state": "ENABLE",
"sort": 2,
"value": null,
"type": "NONE",
"discription": "用于内容管理的菜单",
"createUserId": 1
},
"childs": [
{
"entity": {
"id": 10,
"parentMenuId": 9,
"name": "classifyManage",
"icon": "el-icon-printer",
"alias": "分类管理",
"state": "ENABLE",
"sort": 0,
"value": "/content/classify",
"type": "LINK",
"discription": "用于分类管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 11,
"parentMenuId": 9,
"name": "articleManage",
"icon": "el-icon-star-on",
"alias": "文章管理",
"state": "ENABLE",
"sort": 1,
"value": "/content/article",
"type": "LINK",
"discription": "用于文章管理的菜单",
"createUserId": 1
},
"childs": null
},
{
"entity": {
"id": 12,
"parentMenuId": 9,
"name": "commentManage",
"icon": "el-icon-share",
"alias": "评论管理",
"state": "ENABLE",
"sort": 2,
"value": "/content/comment",
"type": "LINK",
"discription": "用于评论管理的菜单",
"createUserId": 1
},
"childs": null
}
]
}
]
}

然后我们定义一个父级组件siderbar.vue：

[code]<template>
<!--左侧菜单组件-->
<el-menu
default-active="0"
class="el-menu-vertical-demo"
@select="menuSelected"
background-color="#F0F6F6"
text-color="#3C3F41"
active-text-color="black">
<nav-menu :navMenus="leftMenus"></nav-menu>
</el-menu>

</template>

<script>
import NavMenu from './NavMenu.vue'
import {data1} from './data.js'
export default{
data(){
return{
leftMenus:data1.list
}
},
components:{
NavMenu
},
created(){
console.log('数据信息',this.leftMenus)
},
methods:{
menuSelected(index,indexPath){
console.log('当前绑定的index值',index)
console.log('当前绑定的index与path值',indexPath)
}
}
}
</script>

<style>
</style>

我们需要对侧边栏配置可以查看elementui官方文档具体配置

最后，我们引入子组件，并且递归调用：

[code]<template>
<div class="navMenu">

<label v-for="navMenu in navMenus">
<!--只有一级菜单-->
<el-menu-item v-if="navMenu.childs==null&&navMenu.entity&&navMenu.entity.state==='ENABLE'"
:key="navMenu.entity.id" :data="navMenu" :index="navMenu.entity.name" :route="navMenu.entity.value"
>
<!--图标-->
<i :class="navMenu.entity.icon"></i>
<!--标题-->
<span slot="title">{{navMenu.entity.alias}}</span>
</el-menu-item>
<!--有多级菜单-->
<el-submenu v-if="navMenu.childs&&navMenu.entity&&navMenu.entity.state==='ENABLE'"
:key="navMenu.entity.id" :data="navMenu" :index="navMenu.entity.name">
<template slot="title">
<i :class="navMenu.entity.icon"></i>
<span> {{navMenu.entity.alias}}</span>
</template>
<!--递归组件，把遍历的值传回子组件，完成递归调用-->
<nav-menu :navMenus="navMenu.childs"></nav-menu>
</el-submenu>
</label>

</div>
</template>

<script>
export default {
name: 'NavMenu', //使用递归组件必须要有
props: ['navMenus'], // 传入子组件的数据
data() {
return {}
},
methods: {}
}
</script>

<style scoped>

</style>

具体的注意事项以及代码解释在代码中都有注释

最后的效果图，如果我们需要增加菜单以及菜单级别只需在数据层改动即可：