摘要：
下面的页面使用el中的Layout布局来呈现三级页面列表。每行占用24个单元格{｛item1.authName｝｝编辑删除分配权限˃.vcenter｛display：flex；align items:center；｝
下面的页面进行三级页面列表渲染 使用了el中的Layout布局 每一行占24个格 
<!-- 角色列表区域 -->
<el-table :data="rolelist" border stripe>
<!-- 展开列 -->
<el-table-column type="expand">
<template slot-scope="scope">
<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
<!-- 渲染一级权限 -->
<el-col :span="5">
<el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
<i class="el-icon-caret-right"></i>
</el-col>
<!-- 渲染二级和三级权限 -->
<el-col :span="19">
<!-- 通过 for 循环 嵌套渲染二级权限 -->
<el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
<el-col :span="6">
<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
<i class="el-icon-caret-right"></i>
</el-col>
<el-col :span="18">
<el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
</el-col>
</el-row>
</el-col>
</el-row>
<!-- <pre>
{{scope.row}}
</pre> -->
</template>
</el-table-column>
<!-- 索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="角色名称" prop="roleName"></el-table-column>
<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
<el-table-column label="操作" width="300px">
<template slot-scope="scope">
<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
</template>
</el-table-column>.vcenter { display: flex; align-items: center; }