tutorial / mini-app

<!--coupon.wxml-->
<scroll-view class="xn-main clearfix" scroll-y lower-threshold='50'    bindscrolltolower="lower">
  <view class="item-list">
    <view class="item" wx:for="{{dataList}}">
      <view class="item-info clearfix">
        <view class="name">{{item.couponDefinition.name}}</view>
        <view class="price" wx:if="{{item.couponDefinition.profitType=='DISCOUNT_PERCENT'}}">
            <text class="number">{{item.couponDefinition.profitQuantity}}</text><text class="unit">折</text></view>
        <view class="price" wx:if="{{item.couponDefinition.profitType=='DISCOUNT_AMOUNT'}}">
            <text class="number">{{item.couponDefinition.profitQuantityFixed}}</text><text class="unit">元</text></view>
      </view>
      <view class="date">
        <text wx:if="{{item.couponDefinition.timeType =='forever'}}">永久</text>
        <text wx:else>
          <text> 有效期：</text>
          <text wx:if="{{item.usefulStart}}">{{item.usefulStart}}</text>
          <text wx:if="{{item.usefulStart&& item.usefulEnd}}"> 至 </text> 
          <text wx:if="{{item.usefulEnd}}">{{item.usefulEnd}}</text> 
        </text>
    </view>
    </view>
  </view>
  <view class="tip" wx:if="tip">{{tip}}</view>
</scroll-view>