核心代码：

<view class="weui-flex__item">
              <view class="placeholder" bindtap="selectCommentType" data-index="{{index}}" data-type="GOOD">
                <image wx:if="{{item.commentType!='GOOD'}}" src="/images/icon_good.png"
                style="width:30rpx;height:30rpx;"></image>
                <text wx:if="{{item.commentType!='GOOD'}}" class="order_comment_type_default">好评</text>

                <!--选中-->
                <image wx:if="{{item.commentType=='GOOD'}}" src="/images/icon_good_select.png"
                style="width:30rpx;height:30rpx;"></image>
                <text wx:if="{{item.commentType=='GOOD'}}" class="order_comment_type_selected">好评</text>
              </view>
            </view>

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selectCommentType: function (e) {
    console.log('选中的是第几条评论的哪一种类型', e.currentTarget.dataset);
    var commentList = this.data.commentList;
    var index = parseInt(e.currentTarget.dataset.index);
    commentList[index].commentType = e.currentTarget.dataset.type;
    this.setData({
      'commentList': commentList
    });
  }

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完整代码：

wxml

 <form>
  <view class="order_comment_bg">
    <view wx:for="{{commentList}}" style="background:#fff;">
      <view class="order_comment_item">
        <view class="weui-flex order_comment_content bottom_border">
          <view>
            <view class="placeholder">
              <image src="{{item.commodityIcon}}" class="order_comment_img"></image>
            </view>
          </view