Vue vant-ui框架实现上拉加载下拉刷新功能

目录

• 知识点速记
• 基本用法
• 下拉刷新
• 代码实现
• 1.页面布局
• 2.样式
• 3.方法

下拉刷新效果：

知识点速记

基本用法

List通过loading和finished两个变量控制加载状态，当组件滚动到底部时，会触发load事件并将loading设置成true。此时可以发起异步操作并更新数据，数据更新完毕后，将loading设置成false即可。若数据已全部加载完毕，则直接将finished设置成true即可。

下拉刷新

List 组件可以与PullRefresh组件结合使用，实现下拉刷新的效果。

注意事项：

• v-model ： 是否处于加载状态，加载过程中不触发load事件
• finished： 是否已加载完成，加载完成后不再触发load事件
• offset ： 滚动条与底部距离小于 offset 时触发load事件
• loading-text加载过程中的提示文字
• finished-text加载完成后的提示文字

List有以下三种状态，理解这些状态有助于你正确地使用List组件：

• 非加载中，loading为false，此时会根据列表滚动位置判断是否触发load事件（列表内容不足一屏幕时，会直接触发）
• 加载中，loading为true，表示正在发送异步请求，此时不会触发load事件
• 加载完成，finished为true，此时不会触发load事件

在每次请求完毕后，需要手动将loading设置为false，表示加载结束

事件使用：@load方法

滚动条与底部距离小于 offset 时触发

代码实现

1.页面布局

<template>
  <div class="myOrder">
    <!--公共头部组件-->
    <nav-bar-top :titleText="titleName" :arrowTrue="arrowTrue"></nav-bar-top>
   <!--主体部分-->
    <div class="tabMain" style="margin-top:0">
      <div v-if="noData" class="p30 text-center fontSize30">
         <van-empty class="custom-image" :image="zwdd"/>
      </div>
      <van-pull-refresh v-model="isLoading" @refresh="onRefresh" class="content" success-text="刷新成功">
        <!-- 加载 -->
        <van-list v-if="contractData.length>0" v-model="loading" :finished="finished" :immediate-check="false" finished-text="我也是有底线的"
          @load="onLoad" :offset="10">
          <van-row class="m30 p30 capaIttem" v-for="item in contractData" :key="item.orderId">
            <van-col span="24" class="fontSize30">
              <div class="focus-con">
                <!-- ellipsis-orderNumber -->
                <div class="focus-title">
                  <span class="color3 van-ellipsis">合同编号：{{item.contractNumber}}</span>
                  <!-- <span class="color3 van-ellipsis">{{item.outsideContractId?'订单':'合同'}}编号：{{item.contractNumber}}</span> -->
                  <!-- <img src="../../assets/index/VIPICO.png" class="vipIcon pl20"> -->
                </div>
                <!-- 发票开具状态(0:待申请,1:待审核,2:审核未通过,3:审核已通过) -->
                <div>
                  <van-tag :text-color="item.status=='0'?'#FF9133':item.status=='1'?'#4972FF':item.status=='2'?'#F1403C':'#00CE80'" class="tagStyle">
                    {{item.status=="0"?"待申请":item.status=="1"?"待审核":item.status=="2"?"审核未通过":"审核通过"}}
                  </van-tag>
                </div>
              </div>
            </van-col>
            <van-col span="24" class="mt10">
              <div class="capa-box">
                <div class="focus-title" >
                  <span class="color3 shipName fontSize32">{{item.userName}}</span>
                </div>
              </div>
              <div class="capa-box">
                <div class="color6 flex align-items fontSize24 van-ellipsis ellipsis-content">
                  <img src="../../assets/img/huo.png" class="huoIcon mr5">
                  {{item.unlimitedLoading&&item.unlimitedLoading=="1"?"随船装/":""}}
                  <span class="" v-if="item.cargoWeight">{{item.cargoWeight}}吨/</span>
                  <span class="van-ellipsis">{{item.cargoName?item.cargoName:""}}</span>
                </div>
              </div>
            </van-col>
            <van-col span="24" class="capa-body">
              <div class="capa-con fontSize28">
                <div class="content-left">
                  <img src="../../assets/index/zhuang.png" alt="" class=" mr5">
                  <span>{{item.loadingPort}}</span>
                </div>
                <img src="../../assets/index/arrows.png" class="capa-jt">
                <div class="content-right">
                  <img src="../../assets/index/xie.png" alt="" class=" mr5">
                  <span>{{item.arrivePort}}</span>
                </div>
              </div>
              <div class="capa-time mt10">
                <div class="capa-time-left">
                  <div class="time-img">
                    <img src="../../assets/index/time.png" class="capaImg">
                    <span class="timeTXT fontSize28 pl10">装货时间</span>
                  </div>
                  <div class="timeColor fontSize34 mt10 timeError">
                    {{item.loadingTime?item.loadingTime:"暂无"}}
                  </div>
                </div>
                <div style="height:50px;border-left:1px solid #E1E1E1"></div>
                <div class="capa-time-right">
                  <div class="time-img priceContent">
                    <img src="../../assets/index/money.png" class="capaImg">
                    <span class="timeTXT fontSize28 pl10">合同金额</span>
                  </div>
                  <div>
                    <div class="timeColor fontSize34 mt10 floatRight">
                       <span v-if="item.contractAmount">
                         {{item.priceType=="0"?item.contractAmount+"元":item.priceType=="1"?item.contractAmount+"元/吨":item.contractAmount+"元"}}
                       </span>
                       <span v-else>暂无报价</span>
                    </div>
                  </div>
                </div>
              </div>
            </van-col>
            <van-col style="width:100%" class="mt20">
              <div class="flex flex-end">
                  <van-button plain type="info" class="borderRaduis" size="small" @click="handleLook(item)">查看合同</van-button>
                  <van-button v-show="item.status=='2'" plain type="info ml20" class="borderRaduis" size="small" @click="handleFail(item,item.invoiceId)">失败原因</van-button>
                  <van-button class="ml20 borderRaduis" color="#024ee0" type="info" size="small">{{item.status=='2'?'重新申请':'申请开票'}}</van-button>
              </div>
            </van-col>
          </van-row>
        </van-list>
      </van-pull-refresh>
    </div>
</div>
</template>

2.样式

.myOrder{
  height: 100vh;
  overflow-y: auto;
}
::v-deep.van-cell {
  font-size: 14px;
}
.capaIttem {
  box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.06);
  border-radius: 24px;
  background: #fff;
  position: relative;
}
::v-deep.van-cell {
  padding: 10px 0;
}
::v-deep.van-cell {
  font-size: 40px;
  line-height: 40px;
  font-size: 30px;
}

::v-deep.van-field__left-icon .van-icon {
  font-size: 30px;
}
::v-deep.van-tag {
  font-size: 24px;
  line-height: 40px;
}
::v-deep.van-button--small {
  height: 60px;
  font-size: 24px;
}
::v-deep.van-tabs--line .van-tabs__wrap {
  height: 88px;
}
::v-deep.van-tab {
  font-size: 30px;
}

.searchBtnFixed {
  position: fixed;
  top: 0;
  left: 80px;
  height: 92px;
  line-height: 92px;
  z-index: 1000;
  width: 86%;
  overflow: hidden;
}
::v-deep.van-search {
  position: absolute;
  top: -8px;
  // padding: 13px;
  width: 100%;
}
::v-deep.van-search__content {
  background: #eeeeee;
  border-radius: 16px;
  padding: 5px 10px;
}
.focusSearch ::v-deep.van-icon-clear {
  padding-right: 160px;
}
// 搜索
.onSearch {
  position: absolute;
  right: 50px;
  top: 28px;
  font-size: 30px;
  height: 36px;
  line-height: 36px;
  border-left: 1px solid #cccccd;
  padding-left: 30px;
  color: #024ee0;
}
// 新增
.focus-con {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid #ebedf0;
  padding-bottom: 20px;
}
.capa-title {
  border-bottom: 1px solid #ebedf0;
  padding-bottom: 20px;
  display: flex;
  align-items: center;
}
.focus-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
}
.vipIcon {
  width: 72px;
  height: 34px;
}
.capa-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 10px;
}
.capa-body {

  background: #f5f8ff;
  border-radius: 0.13333rem;
  padding: 0.33333rem;
}
.capa-con {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}
.content-left,
.content-right {
  display: flex;
  justify-content: space-between;
  align-items: center;
  img {
    width: 0.5rem;
    height: 0.5rem;
  }
}
.capa-time {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.time-img {
  display: flex;
  align-items: center;
}
.capaImg {
  width: 30px;
}
.timeColor {
  font-weight: 700;
  color: #024ee0;
}
.order-group {
  display: flex;
  align-items: center;
}
.ellipsis-orderNumber{
  span{
    display: inline-block;
    width: 310px;
  }
}
.ellipsis-txt {
  display: inline-block;
  max-width: 200px;
  text-align: start;
}
.shipName {
  font-weight: 600;
  display: flex;
  align-items: center;
}
.orderNameWidth{
  max-width: 220px;
}
.ellipsis-content{
  width: 400px;
}
.priceContent{
  display: flex;
  justify-content: flex-end;
}
.floatRight{
  float: right;
}
.borderRaduis {
  border-radius: 10px;
  height: 56px;
  .van-button__text {
    font-size: 26px;
  }
}
.huoIcon{
  width: 26px;
  height: 26px;
}
.tagStyle{
  background-color: #fff !important;
}
.contactTel {
  width: 90%;
  border-radius: 10px;
}
.popup-header{
  height: 100px;
  text-align: center;
  color:#fff;
  background: #024EE0;
  line-height: 100px;
}
.contactTel ::v-deep.van-popup__close-icon--top-right{
  top:26px !important;
  color:#fff !important;
}
.popup-box{
  margin:60px 50px 30px;
}
.popup-btn{
  width: 100%;
  border-radius: 20px;
  font-size: 36px;
}
.popupTitle {
  box-sizing: border-box;
  padding: 35px 0 61px 0;
  font-size: 32px;
  color: #333333;
  font-weight: 500;
}
.imgContent {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  margin-bottom: 30px;
  padding: 0 10px;
  li {
    width: 125px;
    height: 125px;
    margin-bottom: 37px;
    background-color: black;
    margin-right: 25px;
  }
  li:nth-of-type(4n) {
    margin-right: 0;
  }
}

3.方法

data数据定义：

data() {
    return {
      zwdd:require("../../assets/img/zwdd.png"),
      titleName: "我要开票",
      arrowTrue: true,
      page: 1,
      pageSize: 10,
      isLoading: false,
      loading: false,
      finished: false,
      noData: false,
      contractData: [],
      timer:null,
    };
  },

加载更多方法onLoad：

// 加载更多
    onLoad() {
      this.loading = true;
      this.timer = setTimeout(() => {
        this.page++;
        this.getInvoicingContractListFun();
      }, 1000);
    },

下拉刷新方法onRefresh：下拉刷新调用接口，并且页数=1

    // 刷新
    onRefresh() {
      this.isLoading = true;
      this.page = 1;
      if (this.contractData.length == 0) {
        this.isLoading = false;
      }
      this.getInvoicingContractListFun();
    },

处理数据列表方法getInvoicingContractListFun:

调用接口，传递相应的参数，获取到数据，去判断处理数据数据的加载，数据合并操作，利用定义的loading、finished、isLoading控制数据上拉数据加载。

    // 数据列表方法
    getInvoicingContractListFun() {
      let params = {
        carrierUserId: this.id,
        pageNum: this.page,
        pageSize: this.pageSize
      };
      getInvoicingContractList(params)
        .then(res => {
          if (res.code == 200) {
            if (this.contractData.length > 0) {
              this.noData = false;
              //当请求前有数据时 第n次请求
              if (this.loading) {
                // 上拉加载
                this.contractData = this.contractData.concat(res.data.records); //上拉加载新数据添加到数组中
                this.$nextTick(() => {
                  //在下次 DOM 更新循环结束之后执行延迟回调
                  this.loading = false; //关闭上拉加载中
                });
                if (res.data.records.length == 0) {
                  //没有更多数据
                  this.finished = true; //上拉加载完毕
                }
              }
              if (this.isLoading) {
                //关闭下拉刷新
                this.isLoading = false; //关闭下拉刷新中
                this.contractData = res.data.records; //重新给数据赋值
                if (this.finished) {
                  //如果上拉加载完毕为true则设为false。解决上拉加载完毕后再下拉刷新就不会执行上拉加载问题
                  this.finished = false;
                }
              }
            } else {
              this.noData = false;
              this.loading = false;
              this.isLoading = false;
              this.finished = false;
              //当请求没有数据时 第一次请求
              if (res.data.records.length == 0) {
                this.noData = true;
              } else {
                this.contractData = res.data.records;
              }
            }
          } else {
            this.$toast(res.msg);
          }
        })
        .catch(error => {});
    },

created中调用方法获取数据

created(){
    //方法调用
    this.getInvoicingContractListFun();
}

最后在beforeDestroy生命周期清除定时器

beforeDestroy() {
    clearTimeout(this.timer);
    this.timer = null;
}

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