set width

src/views/room/index.vue

           <span>{{moment(scope.row.createdAt)}}</span>
         </template>
       </el-table-column>
-      <el-table-column align="center" label="操作" width="350">
+      <el-table-column align="center" label="操作" width="450">
         <template slot-scope="scope">
           <router-link to="/room/index/wechatMember/index">
             <el-button type="primary" size="mini" icon="el-icon-tickets" @click="handlePage(scope.row)">會員管理</el-button>