},
{
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">
