微信小程序 —— 多选选中之后改变样式( 2 )

WXML

view  class="flex-wrap" wx:for="{{comments}}" wx:key="{{comments}}">        <image mode='widthFix' src="{{item.url}}"></image>        <view class="left">          <view class="top">            <view>{{item.name}}</view>            <view>{{item.number}} <text wx:for-index="index" data-index="{{index}}" bindtap='dianji' class="iconfont icon-zan" style="{{item.checked?'color:red;':'color:#bfbfbf;'}}"></text></view>          </view>          <view class="bottom">            {{item.contents}}          </view>

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)  },