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：

<view class="search">
  <view class="search-bar">
    <view class="search-wrap">
        <icon type="search" size="16" class="icon-search" />
        <input type="text" placeholder="请输入搜索内容" class="search-input" name="searchKeyword" bindinput="bindKeywordInput" value="{{searchKeyword}}" />
    </view>
    <view class="search-cancel" bindtap="keywordSearch">搜索</view>
  </view>
  <view class="search-result">
    <scroll-view scroll-y="true" bindscrolltolower="searchScrollLower">
      <view class="result-item" wx:for="{{searchSongList}}" wx:key="unique"  data-data="{{item}}" >
        <view class="icon{{item.isonly=='0' ? ' nocopyright' : ''}}"></view>
        <text class="title">{{item.SongName}}--{{item.SingerName}}</text>
        <view class="subtitle">
          <text>{{item.SingerName}}</text>
        </view>
      </view>
      <view class="loading" hidden="{{!searchLoading}}">正在载入更多...</view>
      <view class="loading complete" hidden="{{!searchLoadingComplete}}">已加载全部</view>
    </scroll-view>
  </view>
</view>

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);
      }
    }
  })
}