html

   <view class="tong-items  {{items2==0 ? "tong-item2":""}}" data-items2="0"  bindtap="ClickTap">钢琴</view>
   <view class="tong-items  {{items2==1 ? "tong-item2":""}}" data-items2="1"  bindtap="ClickTap">钢</view>

js

   data:{
      items2: undefined// 控制分类的样式 
   }
   //点击事件
  ClickTap ：function(e){
             var tempObj = e.currentTarget.dataset;
              var items = tempObj.items2;
              this.setData({
                   items: items
               });
         },