zh_wx/StepPage/pages/second/second.wxml

<!--StepPage/pages/second/second.wxml-->
<cover-image src="../../../images/head.png"></cover-image>
<view class="title">1.选择产品类型</view>
<view class="item_content">
<view style="width:48%">
  <view wx:for="{{productList}}" wx:key="index" class="item_content_shop {{item.is_choose?'choose':'unchoose'}}" bindtap="handleChoose" data-item='{{item}}' data-index='{{index}}'>
  {{item.title}}
 </view>
</view>
<view style="width: 48%">
  <view wx:for="{{itemList}}" wx:key="index" class="item_content_shop_child {{item.is_choose?'choose':'unchoose'}}" bindtap="handleChooseItem" data-item='{{item}}' data-index='{{index}}'>
  {{item.title}}
 </view>
</view>
</view>
<view class="btn">
  <van-button color="linear-gradient(to top, #626365, #ffffff)" custom-class="btn_item" bindtap="handleReturn"><text class="font_item">上一步</text></van-button>
<van-button disabled='{{allowNext?false:true}}' color="linear-gradient(to top, #626365, #ffffff)" 
custom-class="btn_item" bindtap="handleNext"> <text class="font_item">下一步</text></van-button>
</view>