WeChat applet list pull-down refresh pull-up load example code

This article mainly shares the WeChat applet to implement pull-down refresh and pull-up loading of the list. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.

DEMO download

Rendering

##Principle

Use the onPullDownRefresh function (pull-down refresh listening function) and onReachBottom function (pull-up loading listening function) of the WeChat applet to monitor the pull-down and pull-up dynamics of the page, thereby modifying the page data!

Page configuration JSON

##enablePullDownRefresh: Enable pull-down refresh;
onReachBottomDistance: The distance from the bottom of the page when the page pull-down event is triggered, in px.

• 
  

{
 "enablePullDownRefresh": true,
 "onReachBottomDistance": 50
}

WXML

<view class="tui-content">
 <view class="tui-menu-list" wx:for="{{dataList}}">Item -- {{item}}</view>
</view>

JS

This Use setTimeout to simulate requesting data;

Loading data is limited to three times, and calling wx.showToast shows that there is no more data.

Page({
 data: {
 dataList: [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20],
 count : 0
 },
 onPullDownRefresh(){
 var self = this;
 setTimeout(() => {
  // 模拟请求数据，并渲染
  var arr = self.data.dataList, max = Math.max(...arr);
  for (var i = max + 1; i <= max + 3; ++i) {
  arr.unshift(i);
  }
  self.setData({ dataList: arr });
  // 数据成功后，停止下拉刷新
  wx.stopPullDownRefresh();
 }, 1000);
 },
 onReachBottom(){
 var arr = this.data.dataList, max = Math.max(...arr);
 if (this.data.count < 3) {
  for (var i = max + 1; i <= max + 5; ++i) {
  arr.push(i);
  }
  this.setData({
  dataList: arr,
  count: ++this.data.count
  });
 } else {
  wx.showToast({
  title: &#39;没有更多数据了！&#39;,
  image: &#39;../../src/images/noData.png&#39;,
  })
 }
 }
})

Summary

Must use wx.stopPullDownRefresh() to stop pull-down refresh after each data request is completed .

Related recommendations:

Implementation of pull-up loading and pull-down refresh of WeChat applet list

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