vue移动端下拉刷新和上拉加载的实现代码

内容导读

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内容图文

由于自身的项目比较简单，只有几个H5页面，用来嵌入app中，所有没有引入移动端的UI框架，但是介于能让用户在浏览H5页面时有下拉刷新和上拉加载，有更好的用户体验，自己写组件实现。

1、下拉刷新DropDownRefresh.vue

<template lang="html">
  <div class="refreshMoudle" @touchstart="touchStart($event)" @touchmove="touchMove($event)" @touchend="touchEnd($event)" :style="{transform: 'translate3d(0,' + top + 'px, 0)'}">
   <header class="pull-refresh">
    <slot name="pull-refresh">
     <div class="down-tip" v-if="dropDownState==1">
      <img v-if="dropDownStateText.downImg" class="down-tip-img" :src="require('../../assets/images/refreshAndReload/'+dropDownStateText.downImg)">
      <span class="down-tip-text">{{dropDownStateText.downTxt}}</span>
     </div>
     <div class="up-tip" v-if="dropDownState==2">
      <img v-if="dropDownStateText.upImg" class="up-tip-img" :src="require('../../assets/images/refreshAndReload/'+dropDownStateText.upImg)">
      <span class="up-tip-text">{{dropDownStateText.upTxt}}</span>
     </div>
     <div class="refresh-tip" v-if="dropDownState==3">
      <img v-if="dropDownStateText.refreshImg" class="refresh-tip-img" :src="require('../../assets/images/refreshAndReload/'+dropDownStateText.refreshImg)">
      <span class="refresh-tip-text">{{dropDownStateText.refreshTxt}}</span>
     </div>
    </slot>
   </header>
   <slot></slot>
  </div>
</template>
<script>
export default {
 props: {
  onRefresh: {
   type: Function,
   required: false
  }
 },
 data () {
  return {
   defaultOffset: 100, // 默认高度, 相应的修改.releshMoudle的margin-top和.down-tip, .up-tip, .refresh-tip的height
   top: 0,
   scrollIsToTop: 0,
   startY: 0,
   isDropDown: false, // 是否下拉
   isRefreshing: false, // 是否正在刷新
   dropDownState: 1, // 显示1:下拉刷新, 2:松开刷新, 3:刷新中……
   dropDownStateText: {
    downTxt: '下拉刷新',
    downImg: '',
    upTxt: '松开刷新',
    upImg: 'release.png',
    refreshTxt: '刷新中...',
    refreshImg: 'refresh.gif'
   }
  }
 },
 created () {
  if (document.querySelector('.down-tip')) {
   // 获取不同手机的物理像素（dpr）,以便适配rem
   this.defaultOffset = document.querySelector('.down-tip').clientHeight || this.defaultOffset
  }
 },
 methods: {
  touchStart (e) {
   this.startY = e.targetTouches[0].pageY
  },
  touchMove (e) {
   this.scrollIsToTop = document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop // safari 获取scrollTop用window.pageYOffset
   if (e.targetTouches[0].pageY > this.startY) { // 下拉
    this.isDropDown = true
    if (this.scrollIsToTop === 0 && !this.isRefreshing) {
     // 拉动的距离
     let diff = e.targetTouches[0].pageY - this.startY - this.scrollIsToTop
     this.top = Math.pow(diff, 0.8) + (this.dropDownState === 3 ? this.defaultOffset : 0)
     if (this.top >= this.defaultOffset) {
      this.dropDownState = 2
      e.preventDefault()
     } else {
      this.dropDownState = 1
      e.preventDefault()
     }
    }
   } else {
    this.isDropDown = false
    this.dropDownState = 1
   }
  },
  touchEnd (e) {
   if (this.isDropDown && !this.isRefreshing) {
    if (this.top >= this.defaultOffset) { // do refresh
     this.refresh()
     this.isRefreshing = true
     console.log(`do refresh`)
    } else { // cancel refresh
     this.isRefreshing = false
     this.isDropDown = false
     this.dropDownState = 1
     this.top = 0
    }
   }
  },
  refresh () {
   this.dropDownState = 3
   this.top = this.defaultOffset
   setTimeout(() => {
    this.onRefresh(this.refreshDone)
   }, 1200)
  },
  refreshDone () {
   this.isRefreshing = false
   this.isDropDown = false
   this.dropDownState = 1
   this.top = 0
  }
 }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.refreshMoudle {
 width: 100%;
 margin-top: -100px;
 -webkit-overflow-scrolling: touch; /* ios5+ */
}
.pull-refresh {
 width: 100%;
 color: #999;
 transition-duration: 200ms;
}
.refreshMoudle .down-tip,
.up-tip,
.refresh-tip {
 display: flex;
 align-items: center;
 justify-content: center;
 height: 100px;
}
.refreshMoudle .down-tip-img,
.up-tip-img,
.refresh-tip-img {
 width: 35px;
 height: 35px;
 margin-right: 5px;
}
</style>

2、上拉加载PullUpReload.vue

<template lang="html">
 <div class="loadMoudle" @touchstart="touchStart($event)" @touchmove="touchMove($event)" :style="{transform: 'translate3d(0,' + top + 'px, 0)'}">
  <slot></slot>
  <footer class="load-more">
   <slot name="load-more">
    <div class="moreData-tip" v-if="pullUpState==1">
     <span class="moreData-tip-text">{{pullUpStateText.moreDataTxt}}</span>
    </div>
    <div class="loadingMoreData-tip" v-if="pullUpState==2">
     <span class="icon-loading"></span>
     <span class="loadingMoreData-tip-text">{{pullUpStateText.loadingMoreDataTxt}}</span>
    </div>
    <div class="noMoreData-tip" v-if="pullUpState==3">
     <span class="connectingLine"></span>
     <span class="noMoreData-tip-text">{{pullUpStateText.noMoreDataTxt}}</span>
     <span class="connectingLine"></span>
    </div>
   </slot>
  </footer>
 </div>
</template>

<script>
export default {
 props: {
  parentPullUpState: {
   default: 0
  },
  onInfiniteLoad: {
   type: Function,
   require: false
  }
 },
 data () {
  return {
   top: 0,
   startY: 0,
   pullUpState: 0, // 1:上拉加载更多, 2:加载中……, 3:我是有底线的
   isLoading: false, // 是否正在加载
   pullUpStateText: {
    moreDataTxt: '上拉加载更多',
    loadingMoreDataTxt: '加载中...',
    noMoreDataTxt: '我是有底线的'
   }
  }
 },
 methods: {
  touchStart (e) {
   this.startY = e.targetTouches[0].pageY
  },
  touchMove (e) {
   if (e.targetTouches[0].pageY < this.startY) { // 上拉
    this.judgeScrollBarToTheEnd()
   }
  },

  // 判断滚动条是否到底
  judgeScrollBarToTheEnd () {
   let innerHeight = document.querySelector('.loadMoudle').clientHeight
   // 变量scrollTop是滚动条滚动时，距离顶部的距离
   let scrollTop = document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop
   // 变量scrollHeight是滚动条的总高度
   let scrollHeight = document.documentElement.clientHeight || document.body.scrollHeight
   // 滚动条到底部的条件
   if (scrollTop + scrollHeight >= innerHeight) {
    if (this.pullUpState !== 3 && !this.isLoading) {
     this.pullUpState = 1
     this.infiniteLoad()
     // setTimeout(() => {
     //  this.infiniteLoad()
     // }, 200)
    }
   }
  },

  infiniteLoad () {
   this.pullUpState = 2
   this.isLoading = true
   setTimeout(() => {
    this.onInfiniteLoad(this.infiniteLoadDone)
   }, 800)
  },
  infiniteLoadDone () {
   this.pullUpState = 0
   this.isLoading = false
  }
 },
 watch: {
  parentPullUpState (curVal, oldVal) {
   this.pullUpState = curVal
  }
 }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.load-more {
 width: 100%;
 color: #c0c0c0;
 background: #f7f7f7;
}
.moreData-tip,
.loadingMoreData-tip,
.noMoreData-tip {
 display: flex;
 align-items: center;
 justify-content: center;
 height: 150px;
}
.loadMoudle .icon-loading {
 display: inline-flex;
 width: 35px;
 height: 35px;
 background: url(../../assets/images/refreshAndReload/loading.png) no-repeat;
 background-size: cover;
 margin-right: 5px;
 animation: rotating 2s linear infinite;
}
@keyframes rotating {
 0% {
  transform: rotate(0deg);
 }
 100% {
  transform: rotate(1turn);
 }
}
.connectingLine {
 display: inline-flex;
 width: 150px;
 height: 2px;
 background: #ddd;
 margin-left: 20px;
 margin-right: 20px;
}
</style>

3、对两个组件的使用

<template>
 <section class="container">
  <v-refresh :on-refresh="onRefresh">
  <v-reload :on-infinite-load="onInfiniteLoad" :parent-pull-up-state="infiniteLoadData.pullUpState">
  <div class="bank_lists">
   <div class="bank_box">
    <div class="bank_list" v-for="item in bank_list" :key="item.id">
     <div class="bank_icon" :style="{ 'background': 'url(' + require('../assets/images/56_56/'+item.iconName) + ') no-repeat', 'background-size': '100%' }" ></div>
     <span class="bank_name">{{item.bankName}}</span>
    </div>
   </div>
  </div>
  <div class="hot_box">
   <div class="hot_header">
    <span class="hot_name">热门推荐</span>
    <div class="more_box">
     <span class="more_text">查看更多</span>
     <span class="more_icon"></span>
    </div>
   </div>
   <div class="hot_centenrt">
    <div class="hot_centent_left">
     <span class="hot_left_name">{{hot_centent_left.name}}</span>
     <span class="hot_left_desc">{{hot_centent_left.desc}}</span>
     <div class="hot_left_img" :style="{ 'background': 'url(' + require('../assets/images/bank/'+hot_centent_left.imgName) + ') no-repeat', 'background-size': '100%' }" ></div>
    </div>
    <div class="hot_centent_right">
     <div class="hot_right_top">
      <div class="hot_right_text_box">
       <span class="hot_right_name">{{hot_c_r_one.name}}</span>
       <span class="hot_right_desc">{{hot_c_r_one.desc}}</span>
      </div>
      <div class="hot_right_img" :style="{ 'background': 'url(' + require('../assets/images/bank/'+hot_c_r_one.imgName) + ') no-repeat', 'background-size': '100%' }" ></div>
     </div>
     <div class="hot_right_bottom">
      <div class="hot_right_text_box2">
       <span class="hot_right_name2">{{hot_c_r_two.name}}</span>
       <span class="hot_right_desc2">{{hot_c_r_two.desc}}</span>
      </div>
      <div class="hot_right_img" :style="{ 'background': 'url(' + require('../assets/images/bank/'+hot_c_r_two.imgName) + ') no-repeat', 'background-size': '100%' }" ></div>
     </div>
    </div>
   </div>
  </div>
  <div class="card_state">
   <div class="card_progress border-right">
    <div class="progress_icon"></div>
    <div class="card_text">
     <span class="card_state_name">{{card_progress.name}}</span>
     <span class="card_desc">{{card_progress.desc}}</span>
    </div>
   </div>
   <div class="card_activation">
    <div class="activation_icon"></div>
    <div class="card_text">
     <span class="card_state_name">{{card_activation.name}}</span>
     <span class="card_desc">{{card_activation.desc}}</span>
    </div>
   </div>
  </div>
  <div class="card_order">
   <div class="border_bottom card_content_bottom">
    <div class="hot_header">
     <span class="hot_name">热卡排行</span>
    </div>
   </div>
   <div slot="load-more">
   <li class="card_list" v-for="(item,index) in infiniteLoadData.pullUpList" :key="item.id">
    <div class="card_content" :class="infiniteLoadData.pullUpList.length - 1 != index? 'card_content_bottom':''">
     <div class="card_img" :style="{ 'background': 'url(' + require('../assets/images/bank/'+item.imgName) + ') no-repeat', 'background-size': '100%' }" ></div>
     <div class="card_list_text">
      <p class="card_name">{{item.cardName}}</p>
      <p class="card_title">{{item.cardTitle}}</p>
      <div class="card_words_lists">
       <div class="card_words bor_rad_20">
        <p class="card_word">{{item.cardWordOne}}</p>
       </div>
       <div v-if="item.cardWordTwo" class="card_words card_words_two bor_rad_20">
        <p class="card_word">{{item.cardWordTwo}}</p>
       </div>
      </div>
     </div>
    </div>
   </li>
   </div>
  </div>
  </v-reload>
  </v-refresh>
 </section>
</template>

<script>
import DropDownRefresh from './common/DropDownRefresh'
import PullUpReload from './common/PullUpReload'
export default {
 data () {
  return {
   bank_list: [
    {
     iconName: 'zhaoshang.png',
     bankName: '招商银行'
    },
    {
     iconName: 'minsheng.png',
     bankName: '民生银行'
    },
    {
     iconName: 'pingancar.png',
     bankName: '平安联名'
    },
    {
     iconName: 'xingye.png',
     bankName: '兴业银行'
    },
    {
     iconName: 'shanghai.png',
     bankName: '上海银行'
    },
    {
     iconName: 'jiaotong.png',
     bankName: '交通银行'
    },
    {
     iconName: 'guangda.png',
     bankName: '光大银行'
    },
    {
     iconName: 'more.png',
     bankName: '全部银行'
    }
   ],
   hot_centent_left: {
    bankName: '交通银行',
    name: '交行Y-POWER黑卡',
    desc: '额度100%取现',
    imgName: 'jiaohangY-POWER.png'
   },
   hot_c_r_one: {
    bankName: '招商银行',
    name: '招行YOUNG卡',
    desc: '生日月双倍积分',
    imgName: 'zhaohangYOUNG.png'
   },
   hot_c_r_two: {
    bankName: '光大银行',
    name: '光大淘票票公仔联名卡',
    desc: '电影达人必备',
    imgName: 'guangdalianming.png'
   },
   card_progress: {
    name: '办卡进度',
    desc: '让等待随处可见'
   },
   card_activation: {
    name: '办卡激活',
    desc: '让等待随处可见'
   },
   card_list: [
    {
     bankName: '平安联名',
     imgName: 'pinganqiche.png',
     cardName: '平安银行信用卡',
     cardTitle: '平安银行汽车之家联名单币卡',
     cardWordOne: '首年免年费',
     cardWordTwo: '加油88折'
    },
    {
     bankName: '上海银行',
     imgName: 'shanghaitaobao.png',
     cardName: '上海银行信用卡',
     cardTitle: '淘宝金卡',
     cardWordOne: '积分抵现',
     cardWordTwo: '首刷有礼'
    },
    {
     bankName: '华夏银行',
     imgName: 'huaxiaiqiyi.png',
     cardName: '华夏银行信用卡',
     cardTitle: '华夏爱奇艺悦看卡',
     cardWordOne: '送爱奇艺会员',
     cardWordTwo: '商城8折'
    },
    {
     bankName: '浦发银行',
     imgName: 'pufajianyue.png',
     cardName: '浦发银行信用卡',
     cardTitle: '浦发银行简约白金卡',
     cardWordOne: '团购立减',
     cardWordTwo: '酒店优惠 免年费'
    },
    {
     bankName: '中信银行',
     imgName: 'zhongxinbaijin.png',
     cardName: '中信银行信用卡',
     cardTitle: '中信银行i白金信用卡',
     cardWordOne: '首刷有礼',
     cardWordTwo: '双倍积分'
    }
   ],

   // 上拉加载的设置
   infiniteLoadData: {
    initialShowNum: 3, // 初始显示多少条
    everyLoadingNum: 3, // 每次加载的个数
    pullUpState: 0, // 子组件的pullUpState状态
    pullUpList: [], // 上拉加载更多数据的数组
    showPullUpListLength: this.initialShowNum // 上拉加载后所展示的个数
   }
  }
 },
 mounted () {
  this.getStartPullUpState()
  this.getPullUpDefData()
 },
 methods: {
  // 获取上拉加载的初始数据
  getPullUpDefData () {
   this.infiniteLoadData.pullUpList = []
   for (let i = 0; i < this.infiniteLoadData.initialShowNum; i++) {
    this.infiniteLoadData.pullUpList.push(this.card_list[i])
   }
  },

  getStartPullUpState () {
   if (this.card_list.length === this.infiniteLoadData.initialShowNum) {
    // 修改子组件的pullUpState状态
    this.infiniteLoadData.pullUpState = 3
   } else {
    this.infiniteLoadData.pullUpState = 0
   }
  },

  // 上拉一次加载更多的数据
  getPullUpMoreData () {
   this.showPullUpListLength = this.infiniteLoadData.pullUpList.length
   if (this.infiniteLoadData.pullUpList.length + this.infiniteLoadData.everyLoadingNum > this.card_list.length) {
    for (let i = 0; i < this.card_list.length - this.showPullUpListLength; i++) {
     this.infiniteLoadData.pullUpList.push(this.card_list[i + this.showPullUpListLength])
    }
   } else {
    for (let i = 0; i < this.infiniteLoadData.everyLoadingNum; i++) {
     this.infiniteLoadData.pullUpList.push(this.card_list[i + this.showPullUpListLength])
    }
   }
   if (this.card_list.length === this.infiniteLoadData.pullUpList.length) {
    this.infiniteLoadData.pullUpState = 3
   } else {
    this.infiniteLoadData.pullUpState = 0
   }
  },

  // 下拉刷新
  onRefresh (done) {
   // 如果下拉刷新和上拉加载同时使用，下拉时初始化上拉的数据
   this.getStartPullUpState()
   this.getPullUpDefData()
   done() // call done
  },

  // 上拉加载
  onInfiniteLoad (done) {
   if (this.infiniteLoadData.pullUpState === 0) {
    this.getPullUpMoreData()
   }
   done()
  }
 },
 components: {
  'v-refresh': DropDownRefresh,
  'v-reload': PullUpReload
 }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
@import "../assets/css/not2rem.css";
.container {
 display: flex;
 flex-direction: column;
 width: 750px;
 height: 1334px;
 background-color: #f7f7f7;
}

.bank_lists {
 width: 100%;
 height: 320px;
 margin-top: 0px;
 background-color: #fff;
}

.bank_box {
 display: flex;
 flex-wrap: wrap;
 padding: 2px 7px 42px 7px;
}

.bank_list {
 width: 100px;
 height: 98px;
 margin: 40px 42px 0 42px;
}

.bank_icon {
 width: 56px;
 height: 56px;
 margin: 0 22px 18px;
}

.bank_name {
 display: inline-flex;
 width: 110px;
 height: 24px;
 line-height: 24px;
 font-size: 24px;
 color: #333;
}

.hot_box {
 width: 100%;
 height: 420px;
 margin-top: 10px;
 background: #fff;
}

.hot_header {
 display: flex;
 justify-content: space-between;
 align-items: center;
 width: 674px;
 height: 80px;
 margin: 0 30px 0 46px;
}

.hot_name {
 display: inline-flex;
 height: 28px;
 line-height: 28px;
 font-size: 28px;
 color: #333;
}

.more_text {
 display: inline-flex;
 height: 24px;
 line-height: 24px;
 font-size: 24px;
 color: #999;
}

.more_icon {
 display: inline-flex;
 margin-left: 20px;
 width: 11px;
 height: 20px;
 background: url("../assets/images/icon/more.png") no-repeat;
 background-size: 100%;
}

.hot_centenrt {
 display: flex;
 flex-direction: row;
 width: 710px;
 height: 320px;
 margin: 0 20px 20px 20px;
}

.hot_centent_left {
 flex-direction: column;
 width: 350px;
 height: 320px;
 background: #f7f7f7;
}

.hot_left_name {
 display: inline-flex;
 width: 282px;
 height: 24px;
 margin: 50px 34px 0 34px;
 font-size: 24px;
 line-height: 24px;
 color: #333;
}

.hot_left_desc {
 display: inline-flex;
 width: 282px;
 height: 20px;
 margin: 12px 34px 0 34px;
 font-size: 20px;
 line-height: 20px;
 color: #999;
}

.hot_left_img {
 width: 220px;
 height: 142px;
 margin-left: 34px;
 margin-top: 34px;
}

.hot_centent_right {
 flex-direction: column;
 width: 350px;
 height: 320px;
 margin-left: 10px;
}

.hot_right_top {
 display: flex;
 flex-direction: row;
 width: 100%;
 height: 156px;
 background: #f7f7f7;
}

.hot_right_text_box {
 display: flex;
 flex-direction: column;
 width: 180px;
 height: 58px;
 margin: 49px 20px 0 20px;
}

.hot_right_name {
 display: inline-flex;
 width: 100%;
 height: 24px;
 line-height: 24px;
 font-size: 24px;
 color: #333;
}

.hot_right_desc {
 display: inline-flex;
 margin-top: 10px;
 width: 100%;
 height: 24px;
 line-height: 24px;
 font-size: 24px;
 color: #999;
}

.hot_right_img {
 width: 110px;
 height: 70px;
 margin-top: 43px;
}

.hot_right_bottom {
 display: flex;
 flex-wrap: wrap;
 width: 100%;
 height: 156px;
 margin-top: 8px;
 background: #f7f7f7;
}

.hot_right_text_box2 {
 display: flex;
 flex-direction: column;
 width: 180px;
 margin: 31px 20px 0 20px;
}

.hot_right_name2 {
 display: inline-flex;
 width: 100%;
 height: 58px;
 line-height: 30px;
 font-size: 24px;
 color: #333;
}

.hot_right_desc2 {
 display: inline-flex;
 margin-top: 12px;
 width: 100%;
 height: 24px;
 line-height: 24px;
 font-size: 24px;
 color: #999;
}

.card_state {
 display: flex;
 flex-direction: row;
 width: 100%;
 height: 128px;
 margin-top: 10px;
 background-color: #fff;
}
.card_progress {
 display: inline-flex;
 width: 327px;
 height: 88px;
 margin: 20px 0 20px 48px;
}
.progress_icon {
 width: 48px;
 height: 48px;
 margin: 20px 0;
 background: url("../assets/images/icon/search.png") no-repeat;
 background-size: 100%;
}
.activation_icon {
 width: 48px;
 height: 48px;
 margin: 20px 0;
 background: url("../assets/images/icon/activation.png") no-repeat;
 background-size: 100%;
}
.card_text {
 width: 228px;
 height: 66px;
 margin: 11px 20px 11px 30px;
}
.card_state_name {
 display: inline-flex;
 width: 100%;
 height: 28px;
 line-height: 28px;
 font-size: 28px;
 color: #333;
}
.card_desc {
 display: inline-flex;
 width: 100%;
 height: 22px;
 line-height: 22px;
 font-size: 22px;
 margin-top: 16px;
 color: #999;
}
.card_activation {
 display: inline-flex;
 width: 326px;
 height: 88px;
 margin: 20px 0 20px 48px;
}

.card_order {
 width: 100%;
 height: auto;
 margin-top: 10px;
 background-color: #fff;
}
.border_bottom {
 width: 100%;
 height: 80px;
}
.card_list {
 width: 100%;
 height: 228px;
 list-style-type: none;
}
.card_content {
 display: flex;
 flex-direction: row;
 width: 700px;
 height: 228px;
 margin-left: 50px;
}
.card_img {
 width: 186px;
 height: 120px;
 margin: 54px 0 54px 20px;
}
.card_list_text {
 flex-direction: column;
 width: 386px;
 height: 124px;
 margin: 52px 34px 52px 74px;
}
.card_name {
 width: 100%;
 height: 28px;
 line-height: 28px;
 font-size: 28px;
 color: #333;
}
.card_title {
 width: 100%;
 height: 24px;
 margin-top: 20px;
 line-height: 24px;
 font-size: 24px;
 color: #666;
}
.card_words_lists {
 display: flex;
 flex-direction: row;
}
.card_words {
 height: 36px;
 margin-top: 16px;
 background-color: #e8ca88;
}
.card_word {
 height: 20px;
 padding: 8px 18px;
 line-height: 20px;
 font-size: 20px;
 color: #4b4b4b;
}
.card_words_two {
 margin-left: 20px;
}
</style>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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