vue实现歌手列表字母排序，下拉滚动条侧栏排序实时更新
今天写项目的时候遇到了歌手排序的问题，联想到了咱们平时的手机通信录侧栏字母排序，按照ABCDE这样的顺序对名字进行排序
javascript
咱们先来看看效果
那就用vue来实现一遍css
首先新建一个vue页面，取名为helloworld.vue
在页面里写入内容vue
<template>
<div class="hello">
<div class="singer" id="singer">
<div class="singer-top-tag">{{singerTopTag | filterSingerTag}}</div>
<ul class="singer-ul">
<li v-for="(item, index) in list" :key="index" class="singer-ul-li">
<div class="singer-tag" :id="item.tag">{{item.tag | filterSingerTag}}</div>
<ul>
<li v-for="(fitem, findex) in item.data" :key="findex">
<img :src="`https://y.gtimg.cn/music/photo_new/T001R300x300M000${fitem.Fsinger_mid}.jpg?max_age=2592000`">
<div>{{fitem.Fsinger_name}}</div>
</li>
</ul>
</li>
</ul>
</div>
<div class="sort">
<ul>
<li v-for="(item, index) in sortList" :key="index" @click="jumpTag(item)" :class="{current:currentSort == item ? true : false}" >
{{item == `hot` ? `热` : item}}
</li>
</ul>
</div>
</div>
</template>
<script> import axios from 'axios' export default { name: "HelloWorld", data() { return { list:[], // 歌手列表 sortList:[], // 侧栏排序列表 currentSort: 'hot', // 当前排序的标签 singerTopTag: 'hot', // 歌手栏头部的标签名字 }; }, mounted() { this.testData() // 监听滚动条 window.addEventListener('scroll', this.handleScroll) }, destroyed () { // 页面摧毁的时候要关闭监听 window.removeEventListener('scroll', this.handleScroll) }, methods: { handleScroll () { let scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop let offsetTop = 0 this.list.forEach((item,index) => { // 获取每一个排序标签的位置 offsetTop = document.querySelectorAll('.singer-ul-li')[index].offsetTop // 当前滚动条的位置 和 当前的标签偏移顶部的距离进行对比 // 每个歌手的li标签的高度必需要保持一致，我这里的高度是70，能够计算本身项目的内容的具体高度进行修改 if (scrollTop > offsetTop && scrollTop < (offsetTop+ 70*item.data.length)) { this.singerTopTag = item.tag this.currentSort = item.tag } }) }, // 请求数据 testData(){ axios.get(`https://c.y.qq.com/v8/fcg-bin/v8.fcg?g_tk=1928093487&inCharset=utf-8&outCharset=utf-8¬ice=0&format=jsonp&channel=singer&page=list&key=all_all_all&pagesize=100&pagenum=1&hostUin=0&needNewCode=0&platform=yqq&jsonpCallback=jp1`) .then(res => { res = res.data.substring(5,res.data.length-1) res = JSON.parse(res).data.list res = res.sort((a,b) => a.Findex.localeCompare(b.Findex)) res.forEach((item,index) => { // 添加侧栏排序 item.Findex = item.Findex == 9 ? 'hot' : item.Findex this.sortList.push(item.Findex) }) // 去除重复 this.sortList = new Set(this.sortList) this.sortList = [...this.sortList] // 添加排序标签和歌手列表 this.sortList.forEach(e => { this.list.push({ tag:e, data:res.filter(i => i.Findex ==e) }) }) }) }, // 跳转标签 jumpTag(i){ this.singerTopTag = i this.currentSort = i document.querySelector(`#${i}`).scrollIntoView() } }, filters :{ filterSingerTag(i) { return i == `hot` ? `热门` : i } } }; </script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped> .hello { position: relative; background-color: #222; } .singer { position: relative; width: 100%; height: 100%; overflow: hidden; background: #222; } .singer-top-tag { position: fixed; top: 0px; left: 0; width: 100%; height: 30px; line-height: 30px; padding-left: 20px; font-size: 12px; color: hsla(0,0%,100%,.5); background: #333; } .singer-tag { width: 100%; height: 30px; margin-bottom: 20px; line-height: 30px; padding-left: 20px; font-size: 12px; color: hsla(0,0%,100%,.5); background: #333; } .singer-ul-li ul li { list-style-type: none; display: flex; justify-content: flex-start; align-items: center; padding: 0 0 20px 20px; color: rgba(255, 255, 255, .5); } .singer-ul-li ul li img { border-radius: 50%; widows: 50px; height: 50px; } .singer-ul-li ul li div { padding-left: 20px; } .sort { position: fixed; z-index: 30; right: 0; top: 50%; -webkit-transform: translateY(-50%); transform: translateY(-50%); width: 20px; padding: 20px 0; border-radius: 10px; text-align: center; background: rgba(0,0,0,.3); font-family: Helvetica; } ul { margin: 0; padding: 0; } .sort ul{ color: rgba(255,255,255,.6); } .sort ul li { list-style-type: none; padding: 3px; line-height: 1; font-size: 12px; } .current { color: #ffcd32; } </style>复制代码
我是使用的qq音乐接口，获取的数据须要进行处理，若是以为麻烦能够本身写静态数据来代替
数据的格式
const list = [
{
tag:`A`,
data:[
{
img:`https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1558361071&di=0a522afe68fc7e2aa3af34cb5cd8c96a&imgtype=jpg&er=1&src=http%3A%2F%2Fwerkstette.dk%2Fwp-content%2Fuploads%2F2015%2F09%2FEntertainment_Weekly_Photographer_Marc_Hom_British_Actor_Charlie_Hunnam_as_King_Arthur_Retouch_Werkstette10-770x841.jpg`,
Fsinger_name:`奥巴里`
}
]
}，
{
tag:`B`,
data:[
{
img:`https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1558361071&di=0a522afe68fc7e2aa3af34cb5cd8c96a&imgtype=jpg&er=1&src=http%3A%2F%2Fwerkstette.dk%2Fwp-content%2Fuploads%2F2015%2F09%2FEntertainment_Weekly_Photographer_Marc_Hom_British_Actor_Charlie_Hunnam_as_King_Arthur_Retouch_Werkstette10-770x841.jpg`,
Fsinger_name:`BIGBANG`
}
]
},
{
tag:`C`,
data:[
{
img:`https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1558361071&di=0a522afe68fc7e2aa3af34cb5cd8c96a&imgtype=jpg&er=1&src=http%3A%2F%2Fwerkstette.dk%2Fwp-content%2Fuploads%2F2015%2F09%2FEntertainment_Weekly_Photographer_Marc_Hom_British_Actor_Charlie_Hunnam_as_King_Arthur_Retouch_Werkstette10-770x841.jpg`,
Fsinger_name:`蔡依林`
}
]
},
{
tag:`D`,
data:[
{
img:`https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1558361071&di=0a522afe68fc7e2aa3af34cb5cd8c96a&imgtype=jpg&er=1&src=http%3A%2F%2Fwerkstette.dk%2Fwp-content%2Fuploads%2F2015%2F09%2FEntertainment_Weekly_Photographer_Marc_Hom_British_Actor_Charlie_Hunnam_as_King_Arthur_Retouch_Werkstette10-770x841.jpg`,
Fsinger_name:`邓紫棋`
}
]
},
]复制代码