小程序 ：遍历list里面的某个数组的值，等同于 for=“list” list.comment里面的某一项

// 最外层是： wx:for="{
    {list}}" 他的item下面有 wx:for="{
    {item.commentList}}" ，要遍历item.commentList的index,方法：wx:for="{
    {item.commentList}}" wx:for-item="val" wx:for-index="i" wx:key="i"
<view class="content_box_item content_box_item1" style="margin-top: {
    {margintop}}rpx;{
    {list.length==index+1?'margin-bottom:0px;':'margin-bottom:'+ marginbottom+ 'rpx;'}}" wx:key="index" wx:for="{
    {list}}" catchtap="toOrderDetail" data-showStatus="{
    {item.showStatus}}" data-category="{
    {item.category}}" data-id="{
    {item.id}}" data-directOrder="{
    {item.directOrder}}" data-status="{
    {item.status}}" data-index="{
    {index}}" data-fgr="fgrtype">
  <view class="usercontentbox" wx:for="{
    {item.commentList}}" wx:for-item="val" wx:for-index="i" wx:key="i" wx:if="{
    {i<=2}}">
                <view class="userconntenname downstairbox">
                    <view class="downstairbox1">
                        <block wx:if="{
    {val.hotComment}}">
                            <image src="https://zhili-resource.oss-cn-shenzhen.aliyuncs.com/static/DRminapp/hotgif.gif" lazy-load="true" class="hotgif" alt=""/>
                        </block>
                        <view class="downstair2" style="margin-right:{
    {item.user.id==val.user.id?48:0}}rpx;color:#1152B5">
                            <text>{
    {
    val.anonymousNickName || val.user.anonymousNickName|| val.user.nickName}}</text>
                            <text class="downstair" wx:if="{
    {item.user.id==val.user.id}}">楼主</text>
                        </view>
                        <text style="margin-left:10rpx">:</text>
                        {
    {
    val.content}}
                        <view class="pic_text" wx:if="{
    {val.imgUrl}}" src="{
    {val.imgUrl}}" data-src="{
    {val.imgUrl}}">
                            <image lazy-load="true"   src="http://zhili-resource.oss-cn-shenzhen.aliyuncs.com/static/DRminapp/mall/headline/icon_upload_pic_small%402x.png" class="commend_icon" />
                            查看图片
                        </view>
                    </view>