小程序页面

<view class="box">
  <block wx:for="{{ article }}" wx:key="key">
    <view class="article">
      <view class="author">{{ item.author_name }}</view>
      <view class="title" bindtap="getArticleInfo" data-article_id="{{ item.id }}">{{ item.title }}</view>
      <view class="content">{{ item.content }}</view>
      <view class="article-like">
        <image wx:if="{{ item.like_status == 1 }}" src="/images/like/like.png" bindtap="articleLike" data-article_id="{{ item.id }}"></image>
        <image wx:else src="/images/like/nolike.png" bindtap="articleLike" data-article_id="{{ item.id }}"></image>
        
      </view>
    </view>
  </block>
</view>

js

  data: {
    article:[],
    page:1,
    limit:4,
    likes:false
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onl oad: function (options) {
    let page = this.data.page
    let limit = this.data.limit
    let token = wx.getStorageSync('token')
    wx.request({
      url: 'http://www.1902a.com/article?page='+page+'&limit='+limit,
      header:{
        token:token
      },
      success:res=>{
        // console.log(res.data.result)
        let article = res.data.result
        this.setData({
          article
        })
      }
    })
  },
  articleLike(e){
    // console.log(e.currentTarget.dataset.article_id)
    var article_id = e.currentTarget.dataset.article_id
    let token = wx.getStorageSync('token')
    if(token==''){
      wx.navigateTo({
        url: '/pages/login/login',
      })
      return
    }
    // console.log(token)
    wx.request({
      url: 'http://www.1902a.com/like_article',
      header:{
        token:token
      },
      data:{
        article_id:article_id
      },
      method:'POST',
      success:res=>{
        // console.log(res)
         //判断是否点赞成功
         var arr = this.data.article;
         
         //1 没有返回值 这里面重新赋值只能用for不能each也不用foreach
         for (var i=0;i<arr.length;i++)
         { 
           if(arr[i]['id'] == article_id){
             if(res.data.errCode == 1){
               arr[i]['like_status'] = 1;
             }else{
               arr[i]['like_status'] = 0;
             }
          }
         }
         this.setData({
           article:arr
         })
        //  console.log(arr)
      }
    })
  },

PHP 后端

/**
     * 分页列表
     *
     * @return void
     */
    public function getNewsList()
    {
        $data = UserArticle::all();
        // dump($data);die;
        //接收数据
        $page = input('page');
        $limit = input('limit');
        // return checkJson($page);die;
        //偏移量
        $mount = ($page-1)*$limit;
        $newsList = NewsInfo::limit($mount,$limit)->select();
        
        foreach($newsList as $k=>&$v){
            foreach($data as $key=>$val){
                if($v['id']==$val['uid']){
                    $v['like_status'] = 1;
                }
            }
        }
        return checkJson($newsList);
    }
 
    /**
     * 点赞
     *
     * @return void
     */
    public function articleLike()
    {
        $article_id = input('article_id');

        //取出用户id
        $uid = (new Token)->getCurrentKey('id');

        //
        $data = UserArticle::where([
            'uid'=>$uid,
            'article_id'=>$article_id
        ])->find();

        
        if(!empty($data)){
            //如果有数据就删除，取消点赞
            $data->delete();
            return checkJson([],'取消点赞成功',0);
        }

        UserArticle::create([
            'uid'=>$uid,
            'article_id'=>$article_id
        ],true);

        return checkJson([],'点赞成功',1);
    }

进入详情页面时查看是否点赞

public function articleDetail()
    {
        $article_id = input('article_id');

        $articleDetail = NewsInfo::find($article_id);

        //查询是否点赞
        $data = UserArticle::all();
        
        foreach($data as $key=>$val){
            if($articleDetail['news_id']==$val['article_id']){
                $articleDetail['like_status'] = 1;
            }
        }
        
        return checkJson($articleDetail);
    }