schoolwisdoms-student-mp/pages/Components/lessonsList/lessonsList.wxml

<view class="lessons-container">
  <view class="lessons-view">
    <view class="lessons-box" wx:for="{{list}}" wx:key="index">
      <view class="lessons-type">1v1</view>
      <view class="lessons-title">小鹏钢琴课</view>
      <view wx:if="{{(index +1) % 2 == 0 }}" class="{{(index +1) % 2 == 0 ? 'lessons-flag' : ''}}">未补课</view>
      <view wx:if="{{(index +1) % 2 != 0 }}" class="{{(index +1) % 2 != 0 ? 'lessons-flag-ed' : ''}}">已补课</view>
      <view class="lessons-room">钢琴教室01</view>
      <view class="lessons-teacher">授课老师：张老师</view>
      <view class="lessons-date-box">
        <view class="lessons-beginDate">上课时间：2021-02-25 09:00</view>
        <view class="lessons-endDate">请假时间：2021-02-21 17:00</view>
      </view>
      <view class="lessons-btn-box">
        <view class="apply-btn" wx:if="{{(index +1) % 2 ==0}}">申请补课</view>
        <view class="more-btn" wx:else>查看详情</view>
      </view>
    </view>
  </view>
</view>