Sham@双目瞿随着内容的增多，列表页原来越多，为了防止列表页太长，加载数据太多导致卡顿，于是Sham就查资料，试着给小程序列表页添加分页&上拉加载的功能，新手会遇到坑，但是好在多次尝试后，解决了，分享并记录下。
基本思路是给后台PHP读取的时候添加每页数据量限制，然后小程序读取是传值页码，并通过push把数据添加到当前页数组内，上代码。
首先是给PHP添加分页数据限制：
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<?php include_once("con.php"); $json = ''; $data = array(); $array = array(); //分页读取反馈清单 if(isset($_GET['pageNow'])){ class Ctfblist { } //分页显示 $pageSize = 8; //每页显示的数量 $rowCount = 0; //要从数据库中获取 $pageNow = 1; //当前显示第几页 //如果有pageNow就使用，没有就默认第一页。 if (!empty($_GET['pageNow'])){ $pageNow = $_GET['pageNow']; } $pageCount = 0; //表示共有多少页 $sql1 = "select count(fmcname) from ctfeedback"; $result1 = $con->query($sql1); if($result1){ while ($row1 = mysqli_fetch_array($result1,MYSQL_ASSOC) ) { $rowCount = $row1[0]; } } //计算共有多少页，ceil取进1 $pageCount = ceil(($rowCount/$pageSize)); //使用sql语句时，注意有些变量应取出赋值。 $pre = ($pageNow-1)*$pageSize; $sql = "SELECT ctfb_month,ctfb_time,fmcname, count(ctfb_details) as fbnumber,sum(ctfb_actodo) as todonumber FROM ctfeedback group by ctfb_month,ctfb_time,fmcname ORDER BY ctfb_time DESC limit $pre,$pageSize"; //通过group by进行月份分组，然后统计ctfb_details字段的行数，因为前面提交表单时设置不能为空，所以用count统计，然后通过sum来求得ctfb_actodo字段的和，该字段如果未处理，则为1，处理了，则变为0 $result = $con->query($sql); if($result){ while ($row = mysqli_fetch_array($result,MYSQL_ASSOC) ) { $ctfblist = new Ctfblist (); $ctfblist->ctfb_month= $row["ctfb_month"]; $ctfblist->ctfb_time= $row["ctfb_time"]; $ctfblist->fmcname= $row["fmcname"]; $ctfblist->fbnumber= $row["fbnumber"]; $ctfblist->todonumber= $row["todonumber"]; $data[]=$ctfblist; } $json = json_encode($data);//把数据转换为JSON数据. echo "{".'"ctfblist"'.":".$json."}"; }else{ echo "查询失败", $con ->error; } } |
然后是通过小程序读取，首先是小程序js文件：
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// pages/committeefb/committeefb.js const app = getApp() //分页加载 var p = 1 //页数从0开始 var GetList = function (that, icontitle) { wx.showToast({ title: icontitle, icon: "loading", duration: 10000 }); that.setData({ title: '正在加载更多数据', }); wx.request({ url: "https://你的网址/fbdetails.php?pageNow=" + p, method: "GET", data: { page: p }, header: { 'content-type': 'application/json' }, success: function (res) { wx.hideToast(); if (res.data.ctfblist.length > 0) { var l = that.data.ctfblist for (var i = 0; i < res.data.ctfblist.length; i++) { l.push(res.data.ctfblist[i]) } console.log(res.data.ctfblist); that.setData({ ctfblist: l, title: '还有更多信息，点我或上拉加载', }); p = p + 1;//10是每页多少条数据 console.log(p); // console.log(res.data.ctfblist.length); } else { wx.showToast({ title: '页面加载结束', icon: "loading", duration: 1000 }) that.setData({ title: '没有更多数据了', }); } }, }); }; Page({ /** * 页面的初始数据 */ data: { winHeight: "",//窗口高度 currentTab: 0, //预设当前项的值 scrollLeft: 0, //tab标题的滚动条位置 currentTab: 0,// tab切换 title: "加载中...", /** 分页配置 */ page: 0, ctfblist: [], }, //选项卡获取当前滑块的index bindChange: function (e) { var that = this; that.setData({ currentTab: e.detail.current }); }, //选项卡点击切换，滑块index赋值 swichNav: function (e) { var that = this; if (this.data.currentTab === e.target.dataset.current) { return false; } else { that.setData({ currentTab: e.target.dataset.current }) } }, /** * 生命周期函数--监听页面加载 */ onLoad: function (option) { var that = this; //读取评估 GetList(that, '正在加载数据...'); }, //下拉刷新 onPullDownRefresh: function () { p = 1; console.log("回走") this.setData({ ctfblist: [], }); var that = this GetList(that, "正在刷新数据") setTimeout(function () { // complete wx.hideNavigationBarLoading() //完成停止加载 wx.stopPullDownRefresh() //停止下拉刷新 }, 1000); }, /**点击加载更多，多一个加载功能*/ showmore: function () { console.log("加载") var that = this GetList(that, '加载更多数据') console.log(p) }, /** * 生命周期函数--监听页面初次渲染完成 */ onReady: function () { }, /** * 生命周期函数--监听页面显示 */ onShow: function () { }, /** * 生命周期函数--监听页面隐藏 */ onHide: function () { }, /** * 生命周期函数--监听页面卸载 */ onUnload: function () { //这段一定要加，不然等到上拉加载完成至无更多数据后，跳转到其他页面后，再访问这个页面的时候会不加载数据 p = 1; console.log("回走") this.setData({ ctfblist: [], }); }, /** * 页面上拉触底事件的处理函数 */ onReachBottom: function () { console.log("上拉") var that = this GetList(that, '加载更多数据') console.log(p) }, /** * 用户点击右上角分享 */ onShareAppMessage: function () { } }) |
接着是wxml文件前台显示
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<!--反馈列表--> <view class="myfblist"> <!--选项卡开始--> <view class="swiper-tab"> <view class="swiper-tab-list {{currentTab==0 ? 'on' : ''}}" data-current="0" bindtap="swichNav">我的反馈</view> <view class="swiper-tab-list {{currentTab==1 ? 'on' : ''}}" data-current="1" bindtap="swichNav">待处理反馈</view> <view class="swiper-tab-list {{currentTab==2 ? 'on' : ''}}" data-current="2" bindtap="swichNav">已处理反馈</view> </view> <swiper current="{{currentTab}}" class="swiper-box" duration="300" style="height:{{winHeight}}rpx" bindchange="bindChange"> <!--选项卡1--> <swiper-item > <!--scroll-view 让页面高度自适应，增加滚动条--> <scroll-view scroll-y="true" class="scoll-h" > <!--我的反馈--> <view class="fklist"> <view wx:for="{{ctfblist}}" wx:key="{{item.ctfb_time}}" date-id="{{item.ctfb_time}}" class="fblist" id="{{item.ctfb_time}}" wx:if="{{item.fmcname==fmcname}}" bindtap="showfbdetails" hover-class="fbonhover" > <view class="fbdate">日期：{{item.ctfb_time}}</view> <view class="bywho">by\t{{item.fmcname}}</view> <view class="issue"><text class="blue" wx:if="{{item.todonumber==0}}">反馈{{item.fbnumber}}条</text><text class="red" wx:if="{{item.todonumber>0}}">{{item.todonumber}}条未处理</text></view> </view> </view> <!--我的反馈结束--> </scroll-view> </swiper-item> <!--选项卡2--> <swiper-item> <scroll-view scroll-y="true" class="scoll-h" > <view class='swiper_con'> <!--未处理反馈--> <view class="fklist"> <view wx:for="{{ctfblist}}" wx:key="{{item.ctfb_time}}" date-id="{{item.ctfb_time}}" class="fblist" id="{{item.ctfb_time}}" wx:if="{{item.todonumber>0}}" bindtap="showfbdetails" hover-class="fbonhover" > <view class="fbdate">日期：{{item.ctfb_time}}</view> <view class="bywho">by\t{{item.fmcname}}</view> <view class="issue"><text class="blue" wx:if="{{item.todonumber==0}}">反馈{{item.fbnumber}}条</text><text class="red" wx:if="{{item.todonumber>0}}">{{item.todonumber}}条未处理</text></view> </view> </view> <!--未处理反馈结束--> </view> </scroll-view> </swiper-item> <!--选项卡3--> <swiper-item> <scroll-view scroll-y="true" class="scoll-h" > <view class='swiper_con'> <!--所有反馈--> <view class="fklist"> <view wx:for="{{ctfblist}}" wx:key="{{item.ctfb_time}}" wx:if="{{item.todonumber==0}}" date-id="{{item.ctfb_time}}" class="fblist" id="{{item.ctfb_time}}" bindtap="showfbdetails" hover-class="fbonhover" > <view class="fbdate">日期：{{item.ctfb_time}}</view> <view class="bywho">by\t{{item.fmcname}}</view> <view class="issue"><text class="blue" wx:if="{{item.todonumber==0}}">反馈{{item.fbnumber}}条</text><text class="red" wx:if="{{item.todonumber>0}}">{{item.todonumber}}条未处理</text></view> </view> </view> <!--所有反馈结束--> </view> </scroll-view> </swiper-item> </swiper> <!--选项卡结束--> <view class="loadmore" bindtap="showmore">{{title}}</view> </view> |
然后是wxss
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page{ background-color: #f0f0f0; width: 100%; height:100%; padding-top:10px; } /**选项卡**/ .swiper-tab{ width: 100%; border-bottom: 5rpx solid #50aaff; text-align: center; } .swiper-tab-list{ font-size: 40rpx; display: inline-block; width: 33.33%; color: #777777; margin-bottom:0rpx; } .on{ color: #50aaff; font-weight:bold; border-bottom: 5rpx solid #50aaff; } .swiper-box{ width: 100%; display: flex; flex-grow: row no-wrap; justify-content: space-between; padding: 10rpx 20rpx; box-sizing: border-box; align-items: center; margin:5px 0 5px; } .scoll-h{ height: 100%; } /**反馈清单*/ .myfblist{ display:flex; flex-direction: column; margin:10px auto 0px; padding-top:10px; width:90%; height:auto; background: #fff; border-radius:5px; } .fklist{ display:flex; flex-direction: column; align-items: center; justify-content: center; width:100%; margin:0px auto 10px; padding:5px 0px; background-color: #fff; } .fblist{ display:flex; flex-direction: row; margin:auto; padding:10px 0px 5px; width:95%; color:#5a5a5a; border-bottom: 2rpx dashed #50aaff; } .issue{ width:70px; text-align:center; font-size:12px; } .fbdate{ width:200px; margin-left:-12px; margin-right:5px; text-align:left; font-size:12px; } .bywho{ width:85px; margin-right:5px; text-align:center; font-size:11px; } .red{ color:red; } .blue{ color:#50aaff; } .fbonhover{ background: #50aaff; color:#fff; } .loadmore{ margin:0px auto 10px; display:flex; justify-content: center; align-items: center; width: 90%; font-size:18px; color:#777777; } |
另外，如果需要让下拉刷新生效，还需要再json文件中添加
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"enablePullDownRefresh": true, |
大功告成， 作为一个伸手党，深知伸手党需要什么 ，所以全套代码奉上。
如果觉得不错，就给个评论好评或者赏杯速溶咖啡呗！
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