wx:for 也可以巢狀，下邊是一個九九乘法表

<view wx:for="{{[1, 2, 3, 4, 5, 6, 7, 8, 9]}}" wx:for-item="i">
  <view wx:for="{{[1, 2, 3, 4, 5, 6, 7, 8, 9]}}" wx:for-item="j">
    <view wx:if="{{i <= j}}">
      {{i}} * {{j}} = {{i * j}}
    </view>
  </view>
</view>

列表渲染，wx:for-items

//1
data: {
      array: [1, 2, 3, 4, 5]
    }
//2    
<block wx:if="{{true}}">
<view wx:for-items="{{array}}">{{index}} ==> {{item}}</view>
</block>

獲取卡列表

 <view class="card-item" wx:if="{{myCardList.length==1}}" 
 wx:for="{{myCardList}}" wx:for-item="cardItem"   wx:key
 
="{{cardItem.Id}}" >
            <view style="background:url('{{cardItem.BgImg}}') no-repeat center; 
            background-size:  680rpx 304rpx; height: 308rpx;">

            </view>
        </view>