微信小程序的点击添加样式，多个选择

  view  class="flex-wrap" wx:for="{{comments}}" wx:key="{{comments}}">
    
    
      
        {{item.name}}
        {{item.number}} 
      
      
        {{item.contents}}
      

  //js
   dianji:function(e){
      console.log(e.currentTarget.dataset.index)
      var index = e.currentTarget.dataset.index
      var comments = this.data.comments
      var that = this
      comments[index].checked = !comments[index].checked
      that.setData({
            comments: comments
       })
      console.log(comments[index].checked)
}, //音乐