微信小程序框架wepy之动态控制类名

<style lang="less" scoped>
  .liBkgCor {
   background-color: red;
  }
</style>

<view class="t_tab">
 <li @tap.stop="changeLi({{1}})" class="{{ liColor == 1 ? 'liBkgCor':'' }}">推荐</li> 
 <li @tap.stop="changeLi({{2}})" class="{{ liColor == 2 ? 'liBkgCor':'' }}">洗手台</li> 
 <li @tap.stop="changeLi({{3}})" class="{{ liColor == 3 ? 'liBkgCor':'' }}">淋浴</li>
 <li @tap.stop="changeLi({{4}})" class="{{ liColor == 4 ? 'liBkgCor':'' }}">马桶</li>
</view>

 data = {
   liColor:1 //默认让第一个tab高亮
  }
  methods = {
   changeLi(e){
    this.liColor = e.target.dataset.wepyParamsA 
    this.$apply() //通知wepy框架data数据更改需要重绘页面
   }
  }