This time I will show you how to pull up and down to refresh and load on the mobile terminal. What are the precautions for pulling up and down to refresh and load on the mobile terminal? Here is a practical case, let’s take a look.
Go directly to the code. If you don’t understand, read it a few times. I will tell you how to use it below.
<template lang="html"> <p class="yo-scroll" :class="{'down':(state===0),'up':(state==1),refresh:(state===2),touch:touching}" @touchstart="touchStart($event)" @touchmove="touchMove($event)" @touchend="touchEnd($event)" @scroll="(onInfinite || infiniteLoading) ? onScroll($event) : undefined"> <section class="inner" :style="{ transform: 'translate3d(0, ' + top + 'px, 0)' }"> <header class="pull-refresh"> <slot name="pull-refresh"> <span class="down-tip">下拉更新</span> <span class="up-tip">松开更新</span> <span class="refresh-tip">更新中</span> </slot> </header> <slot></slot> <footer class="load-more"> <slot name="load-more"> <span>加载中……</span> </slot> </footer> </section> </p> </template> <script> export default { props: { offset: { type: Number, default: 40 }, enableInfinite: { type: Boolean, default: true }, enableRefresh: { type: Boolean, default: true }, onRefresh: { type: Function, default: undefined, required: false }, onInfinite: { type: Function, default: undefined, require: false } }, data() { return { top: 0, state: 0, startY: 0, touching: false, infiniteLoading: false } }, methods: { touchStart(e) { this.startY = e.targetTouches[0].pageY this.startScroll = this.$el.scrollTop || 0 this.touching = true }, touchMove(e) { if (!this.enableRefresh || this.$el.scrollTop > 0 || !this.touching) { return } let diff = e.targetTouches[0].pageY - this.startY - this.startScroll if (diff > 0) e.preventDefault() this.top = Math.pow(diff, 0.8) + (this.state === 2 ? this.offset : 0) if (this.state === 2) { // in refreshing return } if (this.top >= this.offset) { this.state = 1 } else { this.state = 0 } }, touchEnd(e) { if (!this.enableRefresh) return this.touching = false if (this.state === 2) { // in refreshing this.state = 2 this.top = this.offset return } if (this.top >= this.offset) { // do refresh this.refresh() } else { // cancel refresh this.state = 0 this.top = 0 } }, refresh() { this.state = 2 this.top = this.offset this.onRefresh(this.refreshDone) }, refreshDone() { this.state = 0 this.top = 0 }, infinite() { this.infiniteLoading = true this.onInfinite(this.infiniteDone) }, infiniteDone() { this.infiniteLoading = false }, onScroll(e) { if (!this.enableInfinite || this.infiniteLoading) { return } let outerHeight = this.$el.clientHeight let innerHeight = this.$el.querySelector('.inner').clientHeight let scrollTop = this.$el.scrollTop let ptrHeight = this.onRefresh ? this.$el.querySelector('.pull-refresh').clientHeight : 0 let infiniteHeight = this.$el.querySelector('.load-more').clientHeight let bottom = innerHeight - outerHeight - scrollTop - ptrHeight if (bottom < infiniteHeight) this.infinite() } } } </script> <style> .yo-scroll { position: absolute; top: 2.5rem; right: 0; bottom: 0; left: 0; overflow: auto; -webkit-overflow-scrolling: touch; background-color: #ddd } .yo-scroll .inner { position: absolute; top: -2rem; width: 100%; transition-duration: 300ms; } .yo-scroll .pull-refresh { position: relative; left: 0; top: 0; width: 100%; height: 2rem; display: flex; align-items: center; justify-content: center; } .yo-scroll.touch .inner { transition-duration: 0ms; } .yo-scroll.down .down-tip { display: block; } .yo-scroll.up .up-tip { display: block; } .yo-scroll.refresh .refresh-tip { display: block; } .yo-scroll .down-tip, .yo-scroll .refresh-tip, .yo-scroll .up-tip { display: none; } .yo-scroll .load-more { height: 3rem; display: flex; align-items: center; justify-content: center; } </style>
Copy the above component, save it as a component with the suffix .vue and put it under your component, and then introduce it to the page. Here is the code from the demo
I quoted: There is Comments, please leave me a message if you have any questions!
<template> <p> <v-scroll :on-refresh="onRefresh" :on-infinite="onInfinite"> <ul> <li v-for="(item,index) in listdata" >{{item.name}}</li> <li v-for="(item,index) in downdata" >{{item.name}}</li> </ul> </v-scroll> </p> </template> <script> import Scroll from './y-scroll/scroll'; export default{ data () { return { counter : 1, //默认已经显示出15条数据 count等于一是让从16条开始加载 num : 15, // 一次显示多少条 pageStart : 0, // 开始页数 pageEnd : 0, // 结束页数 listdata: [], // 下拉更新数据存放数组 downdata: [] // 上拉更多的数据存放数组 } }, mounted : function(){ this.getList(); }, methods: { getList(){ let vm = this; vm.$http.get('https://api.github.com/repos/typecho-fans/plugins/contents/').then((response) => { vm.listdata = response.data.slice(0,15); }, (response) => { console.log('error'); }); }, onRefresh(done) { this.getList(); done() // call done }, onInfinite(done) { let vm = this; vm.$http.get('https://api.github.com/repos/typecho-fans/plugins/contents/').then((response) => { vm.counter++; vm.pageEnd = vm.num * vm.counter; vm.pageStart = vm.pageEnd - vm.num; let arr = response.data; let i = vm.pageStart; let end = vm.pageEnd; for(; i<end; i++){ let obj ={}; obj["name"] = arr[i].name; vm.downdata.push(obj); if((i + 1) >= response.data.length){ this.$el.querySelector('.load-more').style.display = 'none'; return; } } done() // call done }, (response) => { console.log('error'); }); } }, components : { 'v-scroll': Scroll } } </script>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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