vue實現歌手列表字母排序，下拉滾動條側欄排序實時更新

今天寫項目的時候遇到了歌手排序的問題，聯想到了咱們平時的手機通信錄側欄字母排序，按照ABCDE這樣的順序對名字進行排序

咱們先來看看效果

那就用vue來實現一遍

首先新建一個vue頁面，取名爲helloworld.vue

在頁面裏寫入內容

<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` ? `熱` : item}}
        </li>
      </ul>
    </div>
  </div>
</template>

<script> import axios from 'axios' export default { name: "HelloWorld", data() { return { list:[], // 歌手列表 sortList:[], // 側欄排序列表 currentSort: 'hot', // 當前排序的標籤 singerTopTag: 'hot', // 歌手欄頭部的標籤名字 }; }, mounted() { this.testData() // 監聽滾動條 window.addEventListener('scroll', this.handleScroll) }, destroyed () { // 頁面摧毀的時候要關閉監聽  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) => { // 獲取每一個排序標籤的位置 offsetTop = document.querySelectorAll('.singer-ul-li')[index].offsetTop // 當前滾動條的位置 和 當前的標籤偏移頂部的距離進行對比 // 每個歌手的li標籤的高度必需要保持一致，我這裏的高度是70，能夠計算本身項目的內容的具體高度進行修改 if (scrollTop > offsetTop && scrollTop < (offsetTop+ 70*item.data.length)) { this.singerTopTag = item.tag this.currentSort = item.tag } }) }, // 請求數據 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) => { //　添加側欄排序 item.Findex = item.Findex == 9 ? 'hot' : item.Findex this.sortList.push(item.Findex) }) // 去除重複 this.sortList = new Set(this.sortList) this.sortList = [...this.sortList] // 添加排序標籤和歌手列表 this.sortList.forEach(e => { this.list.push({ tag:e, data:res.filter(i => i.Findex ==e) }) }) }) }, // 跳轉標籤 jumpTag(i){ this.singerTopTag = i this.currentSort = i document.querySelector(`#${i}`).scrollIntoView() } }, filters :{ filterSingerTag(i) { return i == `hot` ? `熱門` : 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>複製代碼

我是使用的qq音樂接口，獲取的數據須要進行處理，若是以爲麻煩能夠本身寫靜態數據來代替

數據的格式

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:`奧巴里`
        }
      ]
  }，
 {
     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:`鄧紫棋`
        }
      ]
  },
]複製代碼

再者還要注意頁面的img標籤，直接複製上面的數據的話要對img標籤進行修改，去掉http那一串，直接用:src="item.img"代替

最後就能夠看效果了，有什麼疑問能夠在下面評論。