微信小程序实战之上拉（分页加载）效果（2）

<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}}</text>   <view class="subtitle">    <text wx:for="{{item.singer}}" wx:key="unique">{{item.name}}</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> 

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.data.song.curnum != 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.song.list : searchList=that.data.searchSongList.concat(data.data.song.list)   that.setData({    searchSongList: searchList, //获取数据数组    zhida: data.data.zhida, //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: 'https://c.y.qq.com/soso/fcgi-bin/search_for_qq_cp',  data: {   g_tk: 5381,   uin: 0,   format: 'json',   inCharset: 'utf-8',   outCharset: 'utf-8',   notice: 0,   platform: 'h5',   needNewCode: 1,   w: keyword,   zhidaqu: 1,   catZhida: 1,   t: 0,   flag: 1,   ie: 'utf-8',   sem: 1,   aggr: 0,   perpage: 20,   n: callbackcount, //返回数据的个数   p: pageindex,   remoteplace: 'txt.mqq.all',   _: Date.now()  },  method: 'GET',  header: {'content-Type': 'application/json'},  success: function(res){   if(res.statusCode == 200){   callback(res.data);   }  }  }) }  module.exports = {  getSearchMusic: getSearchMusic } 

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; }