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小程序页面效果之--滑动屏幕加载数据
发布时间:2020-12-28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
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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: ':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）
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<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">
