微信小程序中实现文字展开收起效果

图片效果

html代码

<view class="body">
        <view class="section">
            <view class="col-body" wx:for="{
  {caseData}}" wx:key="index" >
                <view class="col-bg"></view>
                <view wx:for="{
  {caseData[index]}}" wx:key="key" wx:for-index="selfKey" wx:for-item="selfValue">
                    <view class="col-group" wx:if="{
  {showContent == index}}" >