vue递归组件实现elementUI多级菜单
本文实例为大家分享了vue递归组件实现elementUI多级菜单的具体代码,供大家参考,具体内容如下
先看效果:
一、子组件
<template> <div class="myDiv"> <!-- 这里的listAll用于接收父组件传递进来的菜单列表 --> <template v-for="(item,i) in listAll"> <!-- 有child就显示child的下拉型菜单,有小箭头 --> <el-submenu :index="item.index" :key="i" v-if="item.child.length!=0"> <template slot="title"> <img :src="item.img" alt=""> <span>{{item.title}}</span> </template> <!-- 再次调用自身组件,传入子集,进行循环递归调用 --> <Menu :listAll="item.child"></Menu> </el-submenu> <!-- 没有child,就显示单个目录,没有小箭头 --> <el-menu-item :index="item.index" v-else :key="i" @click="handleSelect(item.path,item.title,item.index)"> <span slot="title"><img :src="item.img" alt="">{{item.title}}</span> </el-menu-item> </template> </div> </template> <script> export default { name: 'Menu', components: {}, props: ['listAll'], data() { return { realList: this.listAll, } }, methods: { //设置路由跳转 handleSelect(path, name, selfIndex) { this.$router.push( { path: "/" + path, query: { r_n: name, index: selfIndex } } ) }, }, } </script>
二、菜单数据准备
菜单中包含索引,图片,名称,跳转路径,这里我给出一部分数据,路由直接用数字了,你们最好定义为组件的英文名称,这样方便维护。
export function menuJson() { var data = [{ title: "元数据管理", img: "../../../static/img/manager.png", index: '1', child: [ { "title": "元数据信息描述管理", "path": "main/02/005", "img": "../../../static/img/manager.png", "index": "1-2", "child": [] }, { "title": "元数据分组定义管理", "path": "main/02/007", "img": "../../../static/img/manager.png", "index": "1-3", "child": [] }, { "title": "元数据信息管理", "path": "main/02", "img": "../../../static/img/manager.png", "index": "1-1", "child": [ { "title": "采集元数据", "path": "main/02/001", "index": "1-1-1", "img": "../../../static/img/blood.png", "child": [] }, { "title": "元模型", "path": "main/02/004", "index": "1-2-1", "img": "../../../static/img/blood.png", "child": [] }, ] }, { "title": "元数据统计分析管理", "path": "main/01", "index": "1-4", "img": "../../../static/img/manager.png", "child": [ { "title": "元数据变更管理", "path": "main/01/001", "index": "1-4-1", "img": "../../../static/img/blood.png", "child": [] }, { "title": "数据地图", "path": "main/01/002", "index": "1-4-2", "img": "../../../static/img/blood.png", "child": [] }, { "title": "元数据分析", "path": "main/01/003", "index": "1-4-3", "img": "../../../static/img/yuanfenxi.png", "child": [ { "title": "血缘分析", "path": "main/01/003/0001", "index": "1-4-3-1", "img": "../../../static/img/blood.png", "child": [] }, { "title": "属性差异分析", "path": "main/01/003/0003", "index": "1-4-3-2", "img": "../../../static/img/chayi.png", "child": [] }, { "title": "影响分析", "path": "main/01/003/0004", "index": "1-4-3-3", "img": "../../../static/img/impact.png", "child": [] }, ] }, ] }, ] }, { title: "规则管理", img: "../../../static/img/manager.png", index: '2', child: [ { "title": "数据接口定义管理", "index": "2-1", "path": "main/03/001", "img": "../../../static/img/source.png", "child": [] }, { "title": "数据转换规则管理", "index": "2-2", "path": "main/03/004", "img": "../../../static/img/modify.png", "child": [] }, ] } ] return data }
三、父组件调用
<template> <div class="content menu"> <div class="menu_com" :style="{height:scrollHeight+'px'}"> <el-col :span="24"> <el-menu :default-active="activeIndex" class="el-menu-vertical-demo" :default-openeds="defalutIndex" background-color="#003289" text-color="#fff" active-text-color="#ffd04b"> //调用子组件 <Menu :listAll="listAll"></Menu> </el-menu> </el-col> </div> </div> </template> <script> import Menu from './menu' import { menuJson } from '../../assets/common/http' //调用js文件中的菜单数据 export default { name: "Menus", mixins: [mixin], components: { Menu }, data() { return { scrollHeight: 400, listAll: [], activeIndex: "-1", defalutIndex: [] } }, created() { //设置点击菜单的索引,可以使得刷新后菜单仍保持原来查看的页面 this.activeIndex = String(this.$route.query.index); this.listAll = menuJson() //通过调用函数menuJson,获取菜单 }, watch: { $route(to, from) { this.activeIndex = this.$route.query.index; } }, } </script> <style scoped lang="less"> @color: #003289; .menu { background: @color; > div { width: 100%; padding-top: 20px; // height: 100%; color: #ffffff; overflow-y: scroll; overflow-x: hidden; &::-webkit-scrollbar { display: none; } h1 { font-size: 20px; text-align: center; padding: 15px 0 25px 0; } } } .el-menu-demo { position: absolute; height: 58px !important; left: 25%; top: 0%; } </style>
补充(面包屑的展示):
有菜单,肯定需要面包屑的展示,例如
这里我用的方法是,根据当前页面名称,从树形菜单数据中查找它的所有父级来实现面包屑导航栏的展示。
html:
<el-breadcrumb separator-class="el-icon-arrow-right"> <el-breadcrumb-item v-for="(item,index) in listMenu" :key="index">{{item}}</el-breadcrumb-item> </el-breadcrumb>
methods:
methods: { //获取树形数据的某个元素的所有父节点 getTreePath(tree, func, path) { if (!tree) return [] for (const data of tree) { // 这里按照你的需求来存放最后返回的内容吧 //这里的title是我的菜单数据里面的名称字段,你可以改成你的 path.push(data.title) if (func(data)) return path if (data.child) { //获取到子数据,递归调用 const findChildren = this.getTreePath(data.child, func, path) if (findChildren.length) return findChildren } path.pop() } return [] }, // 获取面包屑 getNavList() { var name = this.$route.query.r_n //先获取当前路由名称 var tree = menuJson() //获取菜单数据,menuJson这个函数上面用了,返回的事菜单数据 this.path = [] //path用于存放所有父级,调用前需要清空 //data => data.title === name查找数据中的title是否和当前路由名称相等 this.getTreePath(tree, data => data.title === name, this.path) this.listMenu = this.path //找到之后赋值给面包屑路由数组 console.log(this.listMenu) } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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