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&notice=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