微信小程序页面滑动屏幕加载数据效果

来源：好走旅游网

滑动屏幕加载数据是任何小程序中都会用到的功能，本文我就将这个功能整理给大家，希望对大家有意。我们先看看效果图：

创建目录

首先我们现在项目中创建资讯目录，以下是我自己创建的目录，大家可以根据自己的需求创建。如图所示：

创建lists.js文件

以下是lists.js代码

var app = getApp()
Page({
 data: {
 newsList: [],
 lastid: 0,
 toastHidden: true,
 confirmHidden: true,
 isfrist: 1,
 loadHidden: true,
 moreHidden: 'none',
 msg: '没有更多文章了'
 },
 loadData: function (lastid) {
 //显示出加载中的提示
 this.setData({ loadHidden: false })
 var limit = 10
 var that = this
 wx.request({
 url: 'http://127.0.0.1:9090/hpm_bill_web/news/getnewslist', //数据接口
 data: { lastid: lastid, limit: limit },
 header: {
 'Content-Type': 'application/json'
 },
 success: function (res) {
 if (!res.data) {
 that.setData({ toastHidden: false })
 that.setData({ moreHidden: 'none' })
 return false
 }
 var len = res.data.length
 var oldLastid = lastid
 if(len != 0) {
 that.setData({ lastid: res.data[len - 1].id })
 } else {
 that.setData({ toastHidden: false})
 }
 var dataArr = that.data.newsList
 var newData = dataArr.concat(res.data);
 if (oldLastid == 0) {
 wx.setStorageSync('CmsList', newData)
 }
 that.setData({ newsList: newData })
 that.setData({ moreHidden: '' })
 },
 fail: function (res) {
 if (lastid == 0) {
 var newData = wx.getStorageSync('CmsList')
 if(newData) {
 that.setData({ newsList: newData })
 that.setData({ moreHidden: '' })
 var len = newData.length
 if (len != 0) {
 that.setData({ lastid: newData[len - 1].id })
 } else {
 that.setData({ toastHidden: false })
 }
 console.log('data from cache');
 }
 } else {
 that.setData({ toastHidden: false, moreHidden: 'none', msg: '当前网格异常，请稍后再试' })
 }
 },
 complete: function () {
 //显示出加载中的提示
 that.setData({ loadHidden: true })
 }
 })
 },
 loadMore: function (event) {
 var id = event.currentTarget.dataset.lastid
 var isfrist = event.currentTarget.dataset.isfrist
 var that = this
 wx.getNetworkType({
 success: function (res) {
 var networkType = res.networkType // 返回网络类型2g，3g，4g，wifi
 if (networkType != 'wifi' && isfrist == '1') {
 that.setData({ confirmHidden: false })
 }
 }
 })
 this.setData({ isfrist: 0 })
 this.loadData(id);
 },
 onLoad: function () {
 var that = this
 this.loadData(0);
 },
 toastChange: function () {
 this.setData({ toastHidden: true })
 },
 modalChange: function () {
 this.setData({ confirmHidden: true })
 }
})

创建页面文件（lists.wxml）

<view class="warp">
 <!-- 文章列表模板 begin -->
 <template name="items">
 <navigator url="../../pages/detail/detail?id={{id}}" hover-class="navigator-hover">
 <view class="imgs">
 <image src="{{image}}" class="in-img" background-size="cover" model="scaleToFill"></image>
 </view>
 <view class="infos">
 <view class="title">{{name}}</view>
 <view class="dates">{{createtime}}</view>
 </view>
 </navigator>
 </template>
 <!-- 文章列表模板 end -->
 <!-- 循环

输出列表 begin --> <view wx:for="{{newsList}}" class="list"> <template is="items" data="{{...item}}" /> </view>  <loading hidden="{{loadHidden}}" bindchange="loadChange"> 数据加载中... </loading> <view bindtap="loadMore" data-lastid="{{lastid}}" data-isfrist="{{isfrist}}" class="loadMore" style="display:{{moreHidden}}">加载更多</view> <toast hidden="{{toastHidden}}" bindchange="toastChange" duration="3000">{{msg}}</toast> <modal title="温馨提示" no-cancel confirm-text="明确" cancel-text="关闭" hidden="{{confirmHidden}}" bindconfirm="modalChange" bindcancel="modalChange">你当前不在在WIFI网格下下，会产生流量费用</modal> </view>

创建页面样式（lists.wxss）

.warp {height:100%;display:flex;flex-direction: column;padding:20rpx;}
navigator {overflow: hidden;}
.list {margin-bottom:20rpx;height:200rpx;position:relative;}
.imgs{float:left;}
.imgs image {display:block;width:200rpx;height:200rpx;}
.infos {float:left;width:480rpx;height:200rpx;padding:20rpx 0 0 20rpx}
.title {font-size:20px; font-family: Microsoft Yahei}
.dates {font-size:16px;color: #aaa; position: absolute;bottom:0;}
.loadMore {text-align: center; margin:30px;color:#aaa;font-size:16px;}

通过以上代码就能实现在屏幕上滑动显示数据的功能。