Home > Web Front-end > JS Tutorial > body text

vue2.0 mobile terminal implements pull-down refresh and pull-up loading functions

php中世界最好的语言
Release: 2018-04-27 11:01:43
Original
2723 people have browsed it

This time I will bring you the pull-down refresh and pull-up loading functions on the vue2.0 mobile terminal. What are the precautions on how to make the pull-down refresh and pull-up loading function on the vue2.0 mobile terminal? The following 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="{&#39;down&#39;:(state===0),&#39;up&#39;:(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: &#39;translate3d(0, &#39; + top + &#39;px, 0)&#39; }">
   <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 after login

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>
Copy after login

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!

Recommended reading:

What should you pay attention to in Vue front-end development

How to create login control function in vue.js

The above is the detailed content of vue2.0 mobile terminal implements pull-down refresh and pull-up loading functions. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!