How to implement pull-up refresh function using Vue framework

This article mainly introduces in detail the pull-up refresh function based on the Vue framework vux component library. It has a certain reference value. Interested friends can refer to it

The company is currently developing apps , chose the vux component library based on the Vue framework, and now summarizes the pitfalls encountered in implementing the pull-up refresh function:
1. Problem: only refresh once, solution: need to manually reset the status
this.scrollerStatus .pullupStatus = 'default',
2. Problem: Cannot scroll. Solution: Because keep-alive cache is enabled, you need to set

activated () {
 this.$refs.scroller.reset()
}

If it still doesn’t work, please perform the following after obtaining the background data. Code

this.$nxtTick(() => {
    this.$refs.scroller.reset()
   })

Posts the code for the entire page.

<template> 
  <p style="height:100%;">

    <x-header slot="header" :left-options="{showBack: false}" >会议列表 
    <a slot="right" v-on:click="show = true" > <icon type="search"></icon> </button> </a> 
    </x-header>

    <!-- 会议列表 -->
    <scroller v-model="scrollerStatus" height="-46"  lock-x scrollbar-y ref="scroller" :bounce="isbounce" :use-pullup="showUp" :pullup-config="upobj" @on-pullup-loading="selPullUp" >
    <p class="box2">
      <p v-for="list, index in lists">  
         <router-link :to="{ path: list.id } ">
           <p style="height:40px;"> 
            <span class="spanMeetTitle" v-html=&#39;(index+1) + " . " + list.name&#39; ></span>
            <span class="spanMeetStatu" v-html=&#39;list.status&#39;></span>
           </p> 
          <p class="prevSuper">
           <form-preview header-label="" header-value="" :bodyItems="list" :footer-buttons="buttons1"></form-preview>
          </p>
          </router-link>  
          <hr>  
       </p> 
    </p>
    </scroller>

   <!-- 导航 -->
   <Home></Home>

   <!-- 搜索 --> 
   <popup v-model="show" @on-hide="log(&#39;hide&#39;)" @on-show="log(&#39;show&#39;)" height="93%">
   <p class="popup0">
    <group> 
     <x-input v-model=&#39;meetName&#39; placeholder="请输入“会议名称”搜索"></x-input> 
     <p style="float:left;margin-top: -36px;"><icon type="search"></icon></p> 
    </group>
 <!--  
    <group> 
     <checklist :max=1 title="会议审批状态" required :options="commonList" v-model="checkStatus" @on-change="change"></checklist> 
    </group> -->

     <group title="会议审批状态">
     <radio :options="commonList" v-model="checkStatus" @on-change="change"></radio>
    </group>

    <group title="会议类型">
      <selector placeholder="请选择会议类型" v-model="checkType" :options="meetType"></selector>
    </group>

     <group title="召开时间">
     <flexbox>
      <flexbox-item>
      <p class="flex-demo" style="background-color:white;color:black;height:45px"> 
       <datetime title=&#39;&#39; placeholder="请选择" v-model="startTime" format="YYYY-MM-DD HH:mm" @on-change="change" ></datetime>
      </p>
      </flexbox-item>
      至
      <flexbox-item>
      <p class="flex-demo" style="background-color:white;color:black;height:45px">
       <datetime title=&#39;&#39; placeholder="请选择" v-model="stopTime" format="YYYY-MM-DD HH:mm" @on-change="change" ></datetime>
      </p>
      </flexbox-item>
     </flexbox> 
    </group>
    <br>
    <flexbox orient="vertical">
     <flexbox-item><p class="flex-demo" v-on:click="toSearch" >确定</p></flexbox-item>
     <flexbox-item><p class="flex-demo" v-on:click="show = false" style="background-color:white;color:black">取消</p></flexbox-item>
    </flexbox>

   </p>
  </popup>

  <toast v-model="showToast">已加载全部数据</toast>

  <loading v-model="isShowLoading" :text="textLoading"></loading>

  <alert v-model="isShowAlert" :title="AlertCongratulations" > {{ alertMessage }}</alert>
  </p>
</template>

<style type="text/css">
 .weui-form-preview__value{
  font-size: 1.1em !important;
  color: black;
 }
 .spanMeetTitle{
  float: left; 
  border-radius: 13px;
  padding:10px 6px; 
  font-size: 15px; 
  font-weight: bold;
  margin-left: 3px;
  color: black;
 }
 .spanMeetStatu{
   float: right;
   background-color: green;
   border-radius: 10px;
   padding:6px 5px;
   color: white;
   font-size: 13px;
   margin-top: 5px;
 }
 .flex-demo{
  height: 30px;padding-top: 5px; 
 }
 .selected{
  color: blue !important;
  background-color: transparent;
 }
 .popup0 {
 padding-bottom:15px;
 height:200px;
 }
 .popup1 {
  width:100%;
  height:100%;
 }
 .popup2 {
  padding-bottom:15px;
  height:400px;
 }
 .box1 {
  height: 100px;
  position: relative;
  width: 1490px;
 }
 .box1-item {
  width: 200px;
  height: 100px;
  background-color: #ccc;
  display:inline-block;
  margin-left: 15px;
  float: left;
  text-align: center;
  line-height: 100px;
 }
 .box1-item:first-child {
  margin-left: 0;
 }
 .box2-wrap {
  height: 300px;
  overflow: hidden;
 }
</style>

<script>
import { XHeader, Group, FormPreview, Tabbar, TabbarItem, Scroller, Icon, Popup, XSwitch, Toast, XInput, Checklist, Datetime, Flexbox, FlexboxItem, Selector, Loading, Alert, Radio } from &#39;vux&#39;
import Home from &#39;./Home&#39;

export default {
 components: {
  XHeader,
  Home,
  Group,
  FormPreview,
  Tabbar,
  TabbarItem,
  Scroller,
  Icon,
  Popup,
  XSwitch,
  Toast,
  XInput,
  Checklist,
  Datetime,
  Flexbox,
  FlexboxItem,
  Selector,
  Loading,
  Alert,
  Radio
 },
 data () {
  return {
   type: &#39;1&#39;,
   PageIndex: 0,
   show: false,
   showToast: false,
   showloading: false,
   showUp: true,
   isbounce: false,
   isShowAlert: false,
   AlertCongratulations: &#39;条件有误&#39;,
   textloading: &#39;加载中&#39;,
   alertMessage: &#39;‘召开时间&#39; 不能大于 ‘结束时间&#39;&#39;,
   value: &#39;&#39;,
   meetName: &#39;&#39;,
   startTime: &#39;&#39;,
   stopTime: &#39;&#39;,
   meetType: [],
   commonList: [{key: &#39;20&#39;, value: &#39;审批中&#39;}, {key: &#39;50&#39;, value: &#39;审批通过&#39;}, {key: &#39;&#39;, value: &#39;全部&#39;}],
   checkStatus: &#39;&#39;,
   checkType: &#39;&#39;,
   commonList2: [],
   results: [],
   lists: [[]],
   buttons1: [{
    style: &#39;primary&#39;,
    text: &#39;查看更多&#39;,
    link: &#39;/Message&#39;
   }],
   upobj: {
    content: &#39;请上拉刷新数据&#39;,
    pullUpHeight: 60,
    height: 40,
    autoRefresh: false,
    downContent: &#39;请上拉刷新数据&#39;,
    upContent: &#39;请上拉刷新数据&#39;,
    loadingContent: &#39;加载中...&#39;,
    clsPrefix: &#39;xs-plugin-pullup-&#39;
   },
   isShowLoading: false,
   textLoading: &#39;加载中&#39;,
   scrollerStatus: {
    pullupStatus: &#39;default&#39;
   }
  }
 },
 mounted () {
  console.log(this.scrollerStatus.pullupStatus)
  this.getMeetList(true)
  this.getMeetType()
  this.$nextTick(() => {
   this.$refs.scroller.reset()
  })
 },
 methods: {
  log (str) {
   console.log(str)
  },
  getMeetList (isEmpty) {
   var APPROVE_STATUS = this.checkStatus
   var MEETING_TYPE = this.checkType
   this.isShowLoading = true
   this.$http.post(global.httpsUrl + &#39;/Meet/GetMeetList&#39;, {&#39;HumanId&#39;: global.userid, &#39;KEY&#39;: this.meetName, &#39;APPROVE_STATUS&#39;: APPROVE_STATUS, &#39;MEETING_TYPE&#39;: MEETING_TYPE, &#39;START_DATE&#39;: this.startTime, &#39;STOP_DATE&#39;: this.stopTime, &#39;PageIndex&#39;: this.PageIndex, &#39;PageSize&#39;: &#39;2&#39;}).then(response => {
   // sucess callback
    console.log(&#39;111&#39;)
    var data = response.body.Data
    if (isEmpty) {
     this.lists = []
     this.show = false
    } else {
     if (data && data.length === 0) {
      this.showToast = true
      this.isShowLoading = false
      this.scrollerStatus.pullupStatus = &#39;disabled&#39; // 禁用下拉
      return
     }
    }
    for (var i = 0; i < data.length; i++) {
     if (data[i].APPROVE_STATUS < 20) {
      break
     }
     var personName = data[i].PERSION1_NAME
     if (personName && personName.length > 0) {
      personName = personName.substring(0, personName.indexOf(&#39;>&#39;))
     }
     var meetlist = []
     var obj = {
      label: &#39;地点&#39;,
      value: data[i].ADDRESS
     }
     meetlist.push(obj)
     obj = {
      label: &#39;主持人&#39;,
      value: personName
     }
     meetlist.push(obj)
     obj = {
      label: &#39;召开时间&#39;,
      value: global.formatDate.methods.toSet(data[i].ACT_START_TIME, &#39;yyyy-MM-dd HH:mm&#39;)
     }
     meetlist.push(obj)
     obj = {
      label: &#39;会议类型&#39;,
      value: data[i].MEETING_TYPE_NAME
     }
     meetlist.push(obj)
     meetlist.id = &#39;FromMeet/&#39; + data[i].MEETING_MINUTES_GUID + &#39;/123&#39;
     meetlist.name = data[i].MEETING_NAME
     var vstatus = &#39;审批中&#39;
     if (data[i].APPROVE_STATUS === 50) {
      vstatus = &#39;审批通过&#39;
     }
     meetlist.status = vstatus
     this.lists.push(meetlist)
    }
    this.isShowLoading = false
    if (!isEmpty) {
     this.scrollerStatus.pullupStatus = &#39;default&#39;
     // this.$refs.scroller.reset()
     console.log(this.scrollerStatus.pullupStatus)
     this.$nextTick(() => {
      this.$refs.scroller.reset()
     })
    }
   }, response => {
   // error callback
    this.show = false
   })
  },
  showSearch () {
   this.show = true
  },
  change (val) {
   console.log(&#39;change&#39;, val)
   console.log(this.startTime)
  },
  change2 (val) {
   console.log(&#39;change&#39;, val)
  },
  resultClick () {
  },
  getResult () {
  },
  toSearch () {
   console.log(2222)
   if (this.startTime && this.stopTime && this.startTime > this.stopTime) {
    this.isShowAlert = true
   } else {
    this.PageIndex = 0
    this.getMeetList(true)
   }
  },
  selPullUp () {
   console.log(&#39;上拉刷新数据&#39;)
   this.PageIndex++
   this.getMeetList(false)
  },
  getMeetType () {
   this.$http.post(global.httpsUrl + &#39;/Meet/GetMeetType&#39;).then(response => {
    // sucess callback
    var data = response.body.Data
    for (var i = data.length - 1; i >= 0; i--) {
     var obj = {
      key: data[i].TYPE_GUID,
      value: data[i].TYPE_NAME
     }
     this.meetType.push(obj)
    }
   }, response => {
   // error callback
   })
  }
 },
 activated () {
  this.$refs.scroller.reset()
 }
}
</script>

 <style lang="less">
@import &#39;~vux/src/styles/1px.less&#39;;

.flex-demo {
 text-align: center;
 color: #fff;
 background-color: #20b907;
 border-radius: 4px;
 background-clip: padding-box;
}
</style>

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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