trafficBroadcast/miniprogram/pages/home/index.wxml

<!--pages/home/index.wxml-->
<view class="homelist" wx:for="{{list}}" wx:key="title" data-file="{{item.fileName}}" data-title="{{item.title}}" bind:tap="toDetail">
  <image bindload="imageload" style="{{heights[index] + 'px'}}" data-index="{{index}}" class="image" wx:if="{{item.cover}}" src="{{item.cover}}" />
  <view class="title">{{item.title}}</view>
</view>