实现点赞效果，动态刷新条目小心的状态

实现效果

一修改键值对:

wxml:

  <view class="list-item" wx:for="{{articleList}}">
  <navigator url="/pages/webdetailPage/webdetail?url={{item.link}}" hover-class="navigator-hover">
    <view class="list-item-text-title">
      <image  src="/img/ic_user.png" class='userhead'></image>
      <text style='font-size: 13px;'>{{item.author}}</text>
      <text class='item_time'>{{item.niceDate}}</text>
    </view>

    <view style='margin-left: 25rpx; margin-right: 45rpx;'>
      <text class='item_content'>{{item.title}}</text>
    </view>
    
    <view style='margin-bottom: 15rpx; margin-top: 35rpx'>
      <text style='font-size: 13px; color: #1296db; margin-left: 15rpx'>{{item.chapterName}}</text>
      <block    wx:if="{{item.zan > 0}}" >
        <image  src="/img/love.png" class='userlove' data-love="{{index}}" catchtap='love_click'></image>
      </block >

      <block  wx:else>
        <image  src="/img/love_no.png" class='userlove' data-love="{{index}}" catchtap='love_click'></image>
      </block >
      
    </view>
  </navigator>
  </view>

JS:

 love_click:function(e){
var i = e.currentTarget.dataset.love  //获取所点击item的index
 var that = this;
    var zan = "articleList[" + i + "].zan";//先用一个变量，把(articleList[0].zan)用字符串拼接起来
          that.setData({
               [zan]: 1
    })

}

新增键值对：

wxml:

  <view class="list-item" wx:for="{{articleList}}">
  <navigator url="/pages/webdetailPage/webdetail?url={{item.link}}" hover-class="navigator-hover">
    <view class="list-item-text-title">
      <image  src="/img/ic_user.png" class='userhead'></image>
      <text style='font-size: 13px;'>{{item.author}}</text>
      <text class='item_time'>{{item.niceDate}}</text>
    </view>

    <view style='margin-left: 25rpx; margin-right: 45rpx;'>
      <text class='item_content'>{{item.title}}</text>
    </view>
    
    <view style='margin-bottom: 15rpx; margin-top: 35rpx'>
      <text style='font-size: 13px; color: #1296db; margin-left: 15rpx'>{{item.chapterName}}</text>
      <block    wx:if="{{item.love> 0}}" >
        <image  src="/img/love.png" class='userlove' data-love="{{index}}" catchtap='love_click'></image>
      </block >

      <block  wx:else>
        <image  src="/img/love_no.png" class='userlove' data-love="{{index}}" catchtap='love_click'></image>
      </block >
      
    </view>
  </navigator>
  </view>

JS:

 love_click:function(e){
    //新增一个键值对
    var islove = "articleList[" + i + "].islove"
    this.setData({
      [islove]:1
    })
}

数值修改结果页