首页 > 编程语言 > element 中 el-menu 组件的无限极循环思路代码详解
2020
09-27

element 中 el-menu 组件的无限极循环思路代码详解

实现思路主要组件嵌套(组件自己调用自己)

  下面是组件所需要的数据

{
 "code": 1,
 "data": {
  "menuVoList": [
   {
    "childList": [
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587610158,
       "id": "2f006aed6a114579bd8b9809724428f7",
       "name": "系统用户权限管理",
       "parentId": "6d68079a16b94292990f612237bd048e",
       "path": "/userallotrole",
       "updateBy": "0-1",
       "updateTime": 1587610221
      }
     },
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587605059,
       "id": "c948265cdf27420eb7b6b502292c5990",
       "name": "系统用户管理",
       "parentId": "6d68079a16b94292990f612237bd048e",
       "path": "/user",
       "updateBy": "0-1",
       "updateTime": 1587610230
      }
     }
    ],
    "menu": {
     "createBy": "0-1",
     "createTime": 1587605025,
     "id": "6d68079a16b94292990f612237bd048e",
     "name": "用户管理",
     "parentId": "",
     "path": "/#",
     "updateBy": "0-1",
     "updateTime": 1587610117
    }
   },
   {
    "childList": [
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587469457,
       "id": "d4b70897052742bb860cf14cea8cf131",
       "name": "新建/修改菜单",
       "parentId": "82e5ca1ab2e04d8faffeb973286771ec",
       "path": "/newMenu",
       "updateBy": "0-1",
       "updateTime": 1587469457
      }
     }
    ],
    "menu": {
     "createBy": "0-1",
     "createTime": 1587469385,
     "id": "82e5ca1ab2e04d8faffeb973286771ec",
     "name": "菜单管理",
     "parentId": "",
     "path": "",
     "updateBy": "0-1",
     "updateTime": 1587469426
    }
   },
   {
    "childList": [
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587468494,
       "id": "3a092edd120d40b79322d8486e53e5a1",
       "name": "系统角色管理",
       "parentId": "ce5704f647d341fe8334ad12c6dd4a6b",
       "path": "/setrole",
       "updateBy": "0-1",
       "updateTime": 1587469340
      }
     },
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587469360,
       "id": "61d0e4fecbed407d89b1ea5878072374",
       "name": "设置角色权限",
       "parentId": "ce5704f647d341fe8334ad12c6dd4a6b",
       "path": "/authorization",
       "updateBy": "0-1",
       "updateTime": 1587469360
      }
     },
     {
      "childList": [],
      "menu": {
       "createBy": "0-1",
       "createTime": 1587469520,
       "id": "a1a2f6bcbfba4a7f9178ef03ea0fe5b0",
       "name": "权限管理",
       "parentId": "ce5704f647d341fe8334ad12c6dd4a6b",
       "path": "/resource",
       "updateBy": "0-1",
       "updateTime": 1587624251
      }
     }
    ],
    "menu": {
     "createBy": "0-1",
     "createTime": 1587468417,
     "id": "ce5704f647d341fe8334ad12c6dd4a6b",
     "name": "角色管理",
     "parentId": "",
     "path": "",
     "updateBy": "0-1",
     "updateTime": 1587468417
    }
   }
  ]
 },
 "message": "成功"
}

 现在我们来设置组件 (在 componet 文件夹里面建一个 menu.vue) 代码如下

<template>
 <div>
  <template v-for="value in menuData">
   <el-submenu v-if="value.childList.length > '0'" :index="value.menu.name"> //判断传进来的数据中 childList 数组length 是否大于零, 如果大于零表示 不是不需要在循环下去了
    <template slot="title">
     <i class="el-icon-s-tools" />
     <span slot="title">{{ value.menu.name }}</span>
    </template>
    <MenuTree :menu-data="value.childList" />
   </el-submenu>
   <el-menu-item v-else :index="value.menu.path">
    <span slot="title">{{ value.menu.name }}</span>
   </el-menu-item>
  </template>
 </div>
</template>
<script>
export default {
 name: 'MenuTree',
 props: ['menuData']
}
</script>
<style lang="scss" >
.el-submenu__title i {
 color: #fff;
}
.el-menu--collapse {
 width: 54px;
}
</style>

  接下来 在需要使用 menu 组件的地方引入刚才定义的组件

<template>
   <el-menu
    class="el-menu-vertical-demo"
    :collapse="isCollapse"
    background-color="#4A5A74"
    active-text-color="#ffd04b"
    text-color="#fff"
    :unique-opened="true"
    :default-active="this.$route.path"
    @select="handleSelect"
   >
    <menuTree :menu-data="list" />
   </el-menu>
</template>
 
import menuTree from '@/component/menu'
export default{
 components: {
  menuTree
 },
data: {
  list: [] 
},
methods: {
   getMenuList({}).then(res => { //我这里是请求后台得来得数据,没有数据直接用我上面得数据,不过得像我下面这样处理
    if (res.status === 200) {
     this.list = res.data.data.menuVoList
    }
   })
}
}

 这样,em-menu 组件的无限极循环便实现了,注意,我 上面代码中 el-menu 的属性可能多了一些,请根据自己需要删除

到此这篇关于element 中 el-menu 组件的无限极循环的文章就介绍到这了,更多相关el-menu 组件无限极循环内容请搜索自学编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持自学编程网!

编程技巧