vue.js与element-ui实现菜单树形结构

由于业务需要,要求实现树形菜单,且菜单数据由后台返回,在网上找了几篇文章,看下来总算有了解决办法。借鉴文章链接在最底部。

场景:根据业务要求,需要实现活动的树形菜单,菜单数据由后台返回,最后的效果图如下:

后台返回的数据格式是这个样子的:

data=[{
pID:'1',//父ID
name:'目录一',
menuID:'m1',//本身ID
              isContent:false//判断是否是目录
},
{
pID:'1',
name:'目录二',
menuID:'m2',
              isContent:false
},
{
pID:'m1',
name:'目录一--菜单一',
menuID:'m11',
              isContent:true
},
{
pID:'m1',
name:'目录一--目录一',
menuID:'m12',
              isContent:false
},
           {
            pID:'m12',
name:'目录一--目录一--菜单一',
menuID:'m121',
             isContent:true
},
{
pID:'m2',
name:'目录二--菜单一',
menuID:'m21',
              isContent:true

},
{
pID:'m2',
name:'目录二--菜单二',
menuID:'m22',
              isContent:true

},
]

这是一串具有父子关系的数据,首先就是要把这一大串数据转化成树形结构:

tree(){
                let data=[{
                            pID:'1',//父ID
                            name:'目录一',
                            menuID:'m1',//本身ID
                  isContent:false//判断是否是目录
                        },
                        {
                            pID:'1',
                            name:'目录二',
                            menuID:'m2',
                  isContent:false
                        },
                        {
                            pID:'m1',
                            name:'目录一--菜单一',
                            menuID:'m11',
                  isContent:true
                        },
                        {
                            pID:'m1',
                            name:'目录一--目录一',
                            menuID:'m12',
                  isContent:false
                        },
               {
                   pID:'m12',
                            name:'目录一--目录一--菜单一',
                            menuID:'m121',
                  isContent:true
                        },
                        {
                            pID:'m2',
                            name:'目录二--菜单一',
                            menuID:'m21',
                  isContent:true
    
                        },
                        {
                            pID:'m2',
                            name:'目录二--菜单二',
                            menuID:'m22',
                  isContent:true
    
                        },
                    ]
                let tree = []
                for(let i=0;i<data.length;i++){
                    if(data[i].pID == '1'){
                        let obj = data[i]
                        obj.list = []
                        tree.push(obj)
                        data.splice(i,1)
                        i--
                    }
                }
                menuList(tree)
                console.log(tree)
                function menuList(arr){
                    if(data.length !=0){
                        for(let i=0; i<arr.length;i++){
                            for(let j=0;j<data.length;j++){
                                if(data[j].pID == arr[i].menuID){
                                    let obj = data[j]
                                    obj.list = []
                                    arr[i].list.push(obj)
                                    data.splice(j,1)
                                    j--
                                }
                            }
                            menuList(arr[i].list)
                        }
                    }
                }
            }

运行完后返回的结构就是这个样子:

[{"pID":"1","name":"目录一","menuID":"m1","isContent":false,"list":[{"pID":"m1","name":"目录一--菜单一","menuID":"m11","isContent":true,"list":[]},{"pID":"m1","name":"目录一--目录一","menuID":"m12","isContent":false,"list":[{"pID":"m12","name":"目录一--目录一--菜单一","menuID":"m121","isContent":true,"list":[]}]}]},{"pID":"1","name":"目录二","menuID":"m2","isContent":false,"list":[{"pID":"m2","name":"目录二--菜单一","menuID":"m21","isContent":true,"list":[]},{"pID":"m2","name":"目录二--菜单二","menuID":"m22","isContent":true,"list":[]}]}]

 

接下来就要展示了,项目中用的element-ui的导航菜单组件,为了实现这样的树形结构,将每一级的菜单单独作为一个组件,通过判断isContent的值来递归。我直接把代码贴出来

<el-menu 
            theme="dark"
            :default-active="openMenuID"
            :default-openeds="openMenuArr"
            class="el-menu"
          @select="handleSelect">
            <template v-for="(item,index) in menuList">
                  <el-submenu :index=item.menuID v-if="item.IsContent">
                      <template slot="title">
                    <i class="el-icon-menu"></i>
                          {{item.name}}
                      </template>
                      <tree-menu :data="item.list"></tree-menu>
                  </el-submenu>
                  <el-menu-item :index=item.menuID v-else>{{item.name}}</el-menu-item>
            </template>
        </el-menu>

tree-menu组件的代码:

<template v-for="(menu,index) in data">
            <el-submenu :index=menu.menuID v-if="menu.IsContent">
                <template slot="title">
                    <i class="el-icon-plus"></i>
                    {{menu.name}}</template>
                <tree-menu :data="menu.list"></tree-menu>
            </el-submenu>
            <el-menu-item v-else :index=menu.menuID>
                {{menu.name}}
            </el-menu-item>
        </template>

文章链接一:https://blog.csdn.net/liangrongliu1991/article/details/78344648

文章链接二:http://www.jb51.net/article/125074.htm

posted @ 2018-04-20 10:04  Yukiee  阅读(18311)  评论(1编辑  收藏  举报