vue加载url顺序（实现上拉加载下拉刷新）-爱玩科技

逗爷 2023-05-09 12:05:07 977

vue加载url顺序（实现上拉加载下拉刷新）下拉加载实现思路： 5.然后判断在这个屏幕滑动的比例进行状态显示 1.通过touchstart获取用户第一次点击的坐标 2.通过touchmove 判断向上滑动还是向下 4.判断列表的滚动条是否在最顶部

项目需要用到上拉刷新下拉加载所以自己手动实现了一个

组件：

<template>
<div class="my-scroll" ref="myScroll" @touchstart="touchStart($event)" @touchmove="touchMove($event)" @touchend="touchEnd($event)">
<div class="scroll-top" :style="{height:top 'px'}">
<div v-if="aspect==2">
<p v-if="state==6">
下拉刷新
</p>
<p v-if="state==1">
<i><img :src="https://img.aigexing.comLoad"/></i>
<br/>
刷新中
</p>
<p v-if="state==2">松开刷新</p>
<p v-if="state==3">
<i><img :src="https://img.aigexing.comLoad"/></i>
<br/>
刷新完成
</p>
</div>
</div>
<div class="scroll-list" :style="{ transform: 'translate3d(0 ' top 'px 0)'}">
<slot name='scrollList'></slot>
<div class="scroll-bottom">
<div v-if="state==4">加载中</div>
<div v-if="state==5">加载完成</div>
<div v-if="state==7">没有更多</div>
</div>
</div>
</div>
</template>
<script type="text/javascript">
import Load from '../assets/Load.gif'
export default {
name:'myScroll'
props:{
'page':{
type:Object //counter:当前页 pageStart:开始页数 pageEnd:结束页数 total:总页数
require:true
}
'onRefresh':{ //刷新回调
type:Function
require:true
}
'onPull':{ //加载回调
type:Function
require:true
}
'getScrollTop':{ //获取滚动条位置
type:Function
}
'setScrollPage':{ //改变滚动条位置
type:Function
}
}
data(){
return {
Load
pageX:0
pageY:0
state:0
scrollPosition:0
myScroll:null
myScrollList:null
top:0
aspect:0 //1:向下 2:向上
listHeight:0
}
}
created(){
this.$root.$on('setState' (index) => { //修改状态
this.state = index
if(index == 5||index == 3){
setTimeout(()=>{
this.state = 0
this.top = 0
} 300)
}
})
this.$root.$on('ScrollTop' (top)=>{ //修改滚动条位置
this.myScroll.scrollTop = top
})
}
methods:{
touchStart(e){ //触摸事件
this.pageX = e.targetTouches[0].pageX
this.pageY = e.targetTouches[0].pageY
}
touchMove(e){ //触摸滑动事件
this.scrollPosition = this.myScroll.scrollTop //获取滚动条位置
if(e.targetTouches[0].pageY>this.pageY){ //向上滑动
this.aspect = 2
if(this.myScroll.scrollTop==0){
let diff = e.targetTouches[0].pageY - this.pageY - this.scrollPosition
this.top = Math.pow(diff 0.9)
let ranget = diff/document.body.clientHeight*100 //计算在屏幕上滑动了多少
if(ranget > 20){
this.state = 2
}else if(ranget < 15){
this.state = 6
}
e.preventDefault()
}
}else if(this.state!=4){ //向上滑动
this.aspect = 1
}
}
touchEnd(e){
if(this.aspect == 2&&this.state == 2||this.state == 1){ //上拉处理
this.top = 100
this.state = 1
this.topCallback()
}else if(this.aspect == 2){
this.state = 0
this.top = 0
}
}
topCallback(){ //刷新回调
this.onRefresh(this.state)
}
bottomCallback(){ //加载回调
this.state = 4
this.onPull(this.state)
}
}
mounted(){
this.myScroll = this.$refs.myScroll //获取滑条dom
this.myScrollList = this.myScroll.children[1] //获取列表dom
this.myScroll.addEventListener('scroll' (e)=>{ //监听滚动条事件
let listHeight = this.myScrollList.offsetHeight //列表总高度
let listScrollTop = e.target.scrollTop this.myScroll.offsetHeight //当前滚动条位置
if(this.state == 0&&listHeight-listScrollTop < 100){
this.bottomCallback()
}
if(this.getScrollTop)this.getScrollTop(e.target.scrollTop) //返回X，Y
})
}
}
</script>
<style lang="scss" scoped>
.my-scroll{
color: #fff;
max-width: 100%;
max-height: 100%;
height: 100%;
overflow:hidden;
overflow-y: scroll;
-webkit-overflow-scrolling: touch;
will-change: transform;
transition: all 450ms;
backface-visibility: hidden;
perspective: 1000;
position: relative;
.scroll-top{
text-align: center;
display:flex;
position:absolute;
top:0;
left:0;
width:100%;
div{
display:flex;
height:auto;
width:100%;
justify-content: center;
align-items:center;
flex-wrap: wrap;
i{
flex:1 0 100%;
display:block;
height: 0.4rem;
}
img{
width:0.8rem;
}
p{
flex:1 0 100%;
}
}
}
.scroll-list{
overflow:hidden;
}
.scroll-bottom{
text-align: center;
line-height: 40px;
}
}
</style>