微信小程序搜索分页功能实现

1. 这里以搜索歌曲为例：

前端：

  
    
      
          
          
      
    搜索  
    
    
      
        
          
        {{item.SongName}}--{{item.SingerName}}  
          
          {{item.SingerName}}  
          
        
        
        
        
    

样式：

page{  
  display: flex;  
  flex-direction: column;  
  height: 100%;  
}  
  
/*搜索*/  
.search{  
  flex: auto;  
  display: flex;  
  flex-direction: column;  
  background: #fff;  
}  
.search-bar{  
  flex: none;  
  display: flex;  
  align-items: center;  
  justify-content: space-between;  
  padding: 20rpx;  
  background: #f4f4f4;  
}  
.search-wrap{  
  position: relative;  
  flex: auto;  
  display: flex;  
  align-items: center;  
  height: 80rpx;  
  padding: 0 20rpx;  
  background: #fff;  
  border-radius: 6rpx;  
}  
.search-wrap .icon-search{  
  margin-right: 10rpx;  
}  
.search-wrap .search-input{  
  flex: auto;  
  font-size: 28rpx;  
}  
.search-cancel{  
  padding: 0 20rpx;  
  font-size: 28rpx;  
}  
  
/*搜索结果*/  
.search-result{  
  flex: auto;  
  position: relative;  
}  
.search-result scroll-view{  
  position: absolute;  
  bottom: 0;  
  left: 0;  
  right: 0;  
  top: 0;  
}  
.result-item{  
  position: relative;  
  display: flex;  
  flex-direction: column;  
  padding: 20rpx 0 20rpx 110rpx;  
  overflow: hidden;  
  border-bottom: 2rpx solid #e5e5e5;  
}  
  
.result-item .media{  
  position: absolute;  
  left: 16rpx;  
  top: 16rpx;  
  width: 80rpx;  
  height: 80rpx;  
  border-radius: 999rpx;  
}  
.result-item .title,  
.result-item .subtitle{  
  overflow: hidden;  
  text-overflow: ellipsis;  
  white-space: nowrap;  
  line-height: 36rpx;  
}  
.result-item .title{  
  margin-bottom: 4rpx;  
  color: #000;  
}  
.result-item .subtitle{  
  color: #808080;  
  font-size: 24rpx;  
}  
.result-item:first-child .subtitle text{  
  margin-right: 20rpx;  
}  
.result-item:not(:first-child) .subtitle text:not(:first-child):before{  
  content: '/';  
  margin: 0 8rpx;  
}  
.loading{  
  padding: 10rpx;  
  text-align: center;  
}  
.loading:before{  
  display: inline-block;  
  margin-right: 5rpx;  
  vertical-align: middle;  
  content: '';  
  width: 40rpx;  
  height: 40rpx;  
  /* background: url(../../images/icon-loading.png) no-repeat;   */
  background-size: contain;  
  animation: rotate 1s linear infinite;  
}  
.loading.complete:before{  
  display: none;  
}

js:

var util = require('../../utils/util.js')
Page({
  data: {
    searchKeyword: '',  //需要搜索的字符  
    searchSongList: [], //放置返回数据的数组  
    isFromSearch: true,   // 用于判断searchSongList数组是不是空数组，默认true，空的数组  
    searchPageNum: 1,   // 设置加载的第几次，默认是第一次  
    callbackcount: 15,      //返回数据的个数  
    searchLoading: false, //"上拉加载"的变量，默认false，隐藏  
    searchLoadingComplete: false  //“没有数据”的变量，默认false，隐藏  
  },
  //输入框事件，每输入一个字符，就会触发一次  
  bindKeywordInput: function (e) {
    console.log("输入框事件")
    this.setData({
      searchKeyword: e.detail.value
    })
  },
  //搜索，访问网络  
  fetchSearchList: function () {
    let that = this;
    let searchKeyword = that.data.searchKeyword,//输入框字符串作为参数  
      searchPageNum = that.data.searchPageNum,//把第几次加载次数作为参数  
      callbackcount = that.data.callbackcount; //返回数据的个数  
    //访问网络  
    util.getSearchMusic(searchKeyword, searchPageNum, callbackcount, function (data) {
      console.log(data)
      //判断是否有数据，有则取数据  
      if (data.status != 0) {
        let searchList = [];
        //如果isFromSearch是true从data中取出数据，否则先从原来的数据继续添加  
        that.data.isFromSearch ? searchList = data.data.lists : searchList = that.data.searchSongList.concat(data.data.lists)
        that.setData({
          searchSongList: searchList, //获取数据数组  
           //存放歌手属性的对象  
          // searchLoading: true   //把"上拉加载"的变量设为false，显示  
        });
        //没有数据了，把“没有数据”显示，把“上拉加载”隐藏  
      } else {
        that.setData({
          searchLoadingComplete: true, //把“没有数据”设为true，显示  
          searchLoading: false  //把"上拉加载"的变量设为false，隐藏  
        });
      }
    })
  },
 
//点击搜索按钮，触发事件  
  keywordSearch: function (e) {
    this.setData({
      searchPageNum: 1,   //第一次加载，设置1  
      searchSongList: [],  //放置返回数据的数组,设为空  
      isFromSearch: true,  //第一次加载，设置true  
      searchLoading: true,  //把"上拉加载"的变量设为true，显示  
      searchLoadingComplete: false //把“没有数据”设为false，隐藏  
    })
    this.fetchSearchList();
  },
  //滚动到底部触发事件  
  searchScrollLower: function () {
    let that = this;
    if (that.data.searchLoading && !that.data.searchLoadingComplete) {
      that.setData({
        searchPageNum: that.data.searchPageNum + 1,  //每次触发上拉事件，把searchPageNum+1  
        isFromSearch: false  //触发到上拉事件，把isFromSearch设为为false  
      });
      that.fetchSearchList();
    }
  }
})

function getSearchMusic(keyword, pageindex, callbackcount, callback) {
  wx.request({
    url: 'http://songsearch.kugou.com/song_search_v2',
    data: {
keywords:'庄心妍',
clientver:'=& platform=WebFilter'
    },
    // method: 'post',
    header: { 'content-Type': 'application/json' },
    success: function (res) {
      // console.log(res)
      if (res.statusCode == 200) {
        callback(res.data);
      }
    }
  }
  }

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