今天写项目的时候遇到了歌手排序的问题，联想到了我们平时的手机通讯录侧栏字母排序，按照ABCDE这样的顺序对名字进行排序。

我们先来看看效果

那就用vue来实现一遍

首先新建一个vue页面，取名为helloworld.vue

在页面里写入内容

<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
 // 每一个歌手的li标签的高度必须要保持一致，我这里的高度是70，可以计算自己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>

我是使用的qq音乐接口，获取的数据需要进行处理，如果觉得麻烦可以自己写静态数据来代替

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`
 }
 ]
 },
]

再者还要注意页面的img标签，直接复制上面的数据的话要对img标签进行修改，去掉http那一串，直接用:src="item.img"代替

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`
 }
 ]
 },
]

总结

以上所述是小编给大家介绍的vue实现歌手列表字母排序下拉滚动条侧栏排序实时更新,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
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