微信小程序之加载更多（分页加载）实例 ，flutter 瀑布流列表
<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>
js:
var util = require('../../utils/util.js')
Page({
data: {
searchKeyword: '', //需要搜索的字符
sear
chSongList: [], //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();
}
}
})
util.js:
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
}
wxss:
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{
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