vue使用vue-awesome-swiper实现上拉加载更多的效果
程序员文章站
2022-06-24 21:00:22
效果图 src/components/scroll/index.vue
效果图
src/components/scroll/index.vue
<template>
<!-- 通过ref可以获取到dom对象 -->
<swiper class="swiper" :options="swiperoption" ref="swiper">
<div class="mine-scroll-pull-down">
<me-loading :text="pulldowntext" inline ref="pulldownloading" />
</div>
<swiper-slide>
<!-- 所有内容放在插槽里 -->
<slot></slot>
</swiper-slide>
<div class="mine-scroll-pull-up">
<me-loading :text="pulluptext" inline ref="pulluploading" />
</div>
<div class="swiper-scrollbar" slot="scrollbar"></div>
</swiper>
</template>
<script>
import { swiper, swiperslide } from 'vue-awesome-swiper';
import 'swiper/css/swiper.css';
import meloading from 'components/loading';
export default {
name: 'scrollbar',
title: 'scrollbar',
components: {
swiper,
swiperslide,
meloading
},
data() {
return {
pulling:false,//是否正在下拉中
pulldowntext:'向下拉动会重新加载幻灯片哦',
pulluptext:'向上拉动会加载更多哦',
swiperoption: {
scrollbar: {
el: '.swiper-scrollbar',
hide: true
},
direction:'vertical',
slidesperview:'auto',
freemode:true,
setwrappersize:true,
on:{//下拉刷新时触发的事件
slidermove:this.slidermove,//一开始使用slidermove，有bug
touchend:this.touchend
}
},
}
},
props:{
recommends:{
type:[array,object],
default(){
return [];
}
}
},
watch:{//当recommends值发生改变时
recommends(){
this.$refs.swiper && this.$refs.swiper.$swiper.update();//更新滚动条长度
}
},
methods:{
slidermove(){
if(this.pulling) return;//正在下拉中，则不重复下拉
const swiper=this.$refs.swiper.$swiper;
if(swiper.translate>0){//向下拉
if(swiper.translate>100){//超出规定的高度
this.$refs.pulldownloading.settext("开始下拉...");
}else{
this.$refs.pulldownloading.settext("向下拉动会重新加载幻灯片哦");
}
}else if(swiper.isend){//上拉
//是否达到上拉的触发条件
//swiper的位移加上swiper的高度（617px）-50px的值如果大于当前内容高度
//swiper.translate这个属性可以获取到wrapper的位移，其实可以理解为滚动条滚动的距离
//swiper.height这个属性获取swiper容器的高度， 也就是显示区域的高度
//50px是我们设置的一个值。为了让页面不是到达最低部的时候，可以提前加载内容
//parseint(swiper.$wrapperel.css('height'))是wrapper的html元素的height属性， 也就是所有内容的高度
const ispullup=math.abs(swiper.translate)+swiper.height-50 > parseint(swiper.$wrapperel.css('height'));
if(ispullup){//开始上拉
this.$refs.pulluploading.settext("开始上拉");
}else{//保持初始化
this.$refs.pulluploading.settext('向上拉动会加载更多哦');
}
}
},
touchend(){
if(this.pulling) return;//正在下拉中，则不重复下拉
const swiper=this.$refs.swiper.$swiper;
if(swiper.translate>100){
this.pulling=true;//正在下拉中
swiper.allowtouchmove=false;//禁止触摸
swiper.settransition(swiper.params.speed);//设置初始速度
swiper.settranslate(100);//移动到设定的位置（拖动过度时回到设置的位置）
swiper.params.virtualtranslate=true;//定住不给回弹
this.$refs.pulldownloading.settext("正在下拉中...");//设置正在刷新中的文字
this.$emit("pull-down",this.pulldownend);//触发消息，传递结束下拉的函数
}else if(swiper.isend){//上拉
//是否达到上拉的触发条件
const ispullup=math.abs(swiper.translate)+swiper.height-30>parseint(swiper.$wrapperel.css('height'));
if(ispullup){//开始上拉
this.pulling=true;
swiper.allowtouchmove=false;//禁止触摸
swiper.settransition(swiper.params.speed);//设置初始速度
swiper.settranslate(-(parseint(swiper.$wrapperel.css('height'))+50-swiper.height));//超过拉动距离时回弹
swiper.params.virtualtranslate=true;//定住不给回弹
this.$refs.pulluploading.settext("正在上拉中...");//设置正在刷新中的文字
this.$emit("pull-up",this.pullupend);//触发消息，传递结束下拉的函数
}
}
},
pulldownend(){
const swiper=this.$refs.swiper.$swiper;
this.pulling=false;//下拉结束
this.$refs.pulldownloading.settext("下拉结束");//设置加载结束后的文字
swiper.allowtouchmove=true;//可以触摸
swiper.settransition(swiper.params.speed);//设置初始速度
swiper.params.virtualtranslate=false;//可以回弹
swiper.settranslate(0);//移动到最初的位置
},
pullupend(){
const swiper=this.$refs.swiper.$swiper;
this.pulling=false;
this.$refs.pulluploading.settext("上拉结束");//设置加载结束后的文字
swiper.allowtouchmove=true;//可以触摸
swiper.params.virtualtranslate=false;//可以回弹
}
}
}
</script>
<style lang="scss" scoped>
.swiper-container{
width:100%;
height:100%;
overflow:hidden;
}
.swiper-slide{
height:auto;
}
.mine-scroll-pull-down{
position:absolute;
left:0;
bottom:100%;
width:100%;
height:80px;
}
.mine-scroll-pull-up{
position:absolute;
left:0;
top:100%;
width:100%;
height:30px;
}
</style>
src/pages/home/index.vue
<template>
<div class="home">
<scrollbar :data="recommends" @pull-down="pullrefresh" @pull-up="loadmore">
<slider ref="myswiper" />
<home-nav />
<!-- 热门推荐加载完成后更新滚动条 -->
<recommend @loaded="updatescroll" ref="recommend" />
</scrollbar>
<!-- 该页面自己的子路由 -->
<router-view></router-view>
</div>
</template>
<script>
import slider from 'components/slider';
import scrollbar from 'components/scroll';
import homenav from './nav';
import recommend from './recommend';
export default {
name:"home",
components:{
slider,
scrollbar,
homenav,
recommend
},
data(){
return{
recommends:[]
}
},
methods:{
updatescroll(recommends){
this.recommends=recommends;
},
pullrefresh(end){//刷新轮播图
this.$refs.myswiper.getsliders().then(end);
},
loadmore(end){//加载更多
this.$refs.recommend.getrecommends().then(end).catch(err=>{
if(err){//没有更多图片了
console.log(err);
}
end();
});
}
}
}
</script>
<style scoped>
.home{
width:100%;
height:100%;
}
</style>
src/pages/home/recommend.vue
<template>
<div class="recommend">
<h3 class="recommend-title">热卖推荐</h3>
<div class="loading-container" v-if="!recommends.length">
<me-loading inline />
</div>
<ul class="recommend-list">
<li class="recommend-item" v-for="(item,index) in recommends" :key="index">
<router-link class="recommend-link" :to="{name:'home-product',params:{id:item.baseinfo.itemid}}">
<!-- <p class="recommend-pic"><img class="recommend-img" :src="item.baseinfo.picurl"></p> -->
<p class="recommend-pic"><img class="recommend-img" v-lazy="item.baseinfo.picurl"></p>
<p class="recommend-name">{{item.name.shortname}}</p>
<p class="recommend-oriprice"><del>￥{{item.price.origprice}}</del></p>
<p class="recommend-info">
<span class="recommend-price">¥<strong class="recommend-price-num">{{item.price.actprice}}</strong></span>
<span class="recommend-count">{{item.remind.soldcount}}件已售</span>
</p>
</router-link>
</li>
</ul>
</div>
</template>
<script>
import {gethomerecommend} from 'api/recommend';
import meloading from 'components/loading';
export default {
name:"recommend",
data(){
return {
recommends:[],
curpage:1,
totalpage:1
}
},
components:{
meloading
},
created(){
this.getrecommends();
},
methods:{
getrecommends(){
if(this.curpage>this.totalpage) return promise.reject(new error('没有更多了'));
return gethomerecommend(this.curpage).then(data=>{
return new promise(resolve=>{
if(data){
//console.log(data);
this.curpage++;
this.totalpage=data.totalpage;
// concat合并数组内容，每次获取的数据都追加进来
this.recommends=this.recommends.concat(data.itemlist);
this.$emit("loaded",this.recommends);//热门推荐区域加载完毕后触发消息
resolve();
}
})
});
}
}
}
</script>
<style lang="scss" scoped>
.recommend{
position:relative;
width:100%;
padding:10px 0;
font-size:14px;
text-align:center;
background:#fff;
}
.recommend-list{
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap:wrap;
}
.recommend-title{
margin-bottom:15px;
position:relative;
&:before,
&:after{
content:"";
display:block;
position:absolute;
top:50%;
width:40%;
height:1px;
background:#ddd;
}
&:before{
left:0;
}
&:after{
right:0;
}
}
.recommend-item{
width:49%;
background:#fff;
box-shadow:0 1px 1px 0 rgba(0,0,0,0.12);
margin-bottom:8px;
}
.recommend-link{
display:block;
}
.recommend-pic{
position:relative;
width:100%;
padding-top:100%;// 可以实现高度与宽度一致
margin-bottom:5px;
}
.recommend-img{
width:100%;
position:absolute;
top:0;
left:0;
height:100%;
}
.recommend-name{
height:40px;
padding:0 5px;
margin-bottom:8px;
line-height:1.5;
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
white-space: normal !important;
word-wrap: break-word;
text-align:left;
}
.recommend-oriprice{
padding:0 5px;
margin-bottom:8px;
color:#ccc;
text-align:left;
}
.recommend-info{
display: flex;
justify-content: space-between;
align-items: center;
padding:0 5px;
margin-bottom:8px;
}
.recommend-price{
color:#e61414;
&-num{
font-size:20px;
}
}
.recommend-count{
color:#999;
}
.loading-container{
padding-top:80px;
}
</style>
src/api/recommend.js
import jsonp from 'assets/js/jsonp';
//获取热门推荐数据
export const gethomerecommend=(page=1,psize=20)=>{
const url='https://ju.taobao.com/json/tg/ajaxgetitemsv2.json';
const params={
page,
psize,
type:0,
frontcatid:''//type和frontcatid是根据给定的淘宝接口来添加的
}
//调用jsonp获取数据
return jsonp(url,params,{
param:'callback'
}).then(res=>{
if(res.code==='200'){
console.log("加载更多...");
return res;
}
throw new error('没有成功获取到数据');
}).catch(err=>{
if(err){
console.log(err);
}
});
}