先上一张效果图：
以前用angularjs操作基本上都是要取到每个列表的id再循环判断是不是当前点击的列表来显示折叠。
今天在这个项目 https://github.com/IFmiss/vue-music 上看到操作很简单，并没有如此复杂。赶紧记录一下：
折叠列表单独做一个组件，图标是用的iconfont中生成的css链接：myMusicSheetList.vue
<template>
<div class="sheet-list">
<div class="sheet-header" @click="toggleSheet">
<i class="icon iconfont icon-enter" ref="toggleicon"></i>
<span class="sheet-header-span">{{data_item.name}} <span> ({{data_item.num}}) </span></span>
<i class="sheet-header-i icon iconfont icon-setup" @click.stop="showSheetMenu(data_item.name)"></i>
</div>
<div v-if="showSheets" class="sheet-content" v-for="i in data_item.details">
<div class="sheet-content-image">
<img :src="i.details_image" width="50" height="50" style="padding: 5px;overflow: hidden">
</div>
<div class="sheet-content-middle">
<p style="">{{i.details_name}}</p>
<p style="margin-top: 10px;font-size: 14px;color: #666">{{i.details_num}}首歌曲</p>
</div>
<i class="icon iconfont icon-switch" @click.stop="showSheetMenu()"></i>
</div>
</div>
</template>
<script>
export default {
components:{},
props: {
item:{
type:Object
}
},
data(){
return{
showSheets:false,
data_item:{}
}
},
methods:{
//向右的小图标动画
toggleSheet:function(index){
console.log(this.$refs);
this.$refs.toggleicon.style.transform = !this.showSheets ? 'rotate(90deg)' : 'rotate(0)'
this.showSheets = !this.showSheets
},
showSheetMenu:function(){
alert(1111);
}
},
created(){
this.data_item = this.item;
},
}
</script>
<style scoped>
.sheet-list{
clear: both;
}
.sheet-header{
height: 30px;background: #e5e5e5;position: relative;
}
.sheet-header i:nth-child(1){
line-height: 30px;position:absolute;
left:10px;
color:#666;
transition:all 0.5s;
}
.sheet-header-i{
line-height: 30px;position: absolute;right: 10px;
}
.sheet-header-span{
left: 40px;font-size: 14px;position:absolute;line-height: 30px;
}
.sheet-content{
position: relative;width: 100%;display: flex;
}
.sheet-content i{
font-size: 26px;position: absolute;right: 10px;top: 50%;transform:translate(0,-50%);
}
.sheet-content-image{
width: 60px;float: left;text-align: center;
}
.sheet-content-middle{
position: relative;width: 100%;border-bottom: 1px solid #e5e5e5;padding-bottom: 10px;margin-top: 10px;margin-left: 10px;
}
.sheet-content-middle p{
font-size: 16px;width: 70%;color: #666;text-overflow:ellipsis;white-space: nowrap;overflow:hidden;
}
</style>
主页面调用组件：home.vue
<template>
<div class="home">
<sheet-list v-for="(item,index) in sheetList" :item="item"></sheet-list>
</div>
</template>
<script>
import myMusicSheetList from './../../components/myMusicSheetList.vue'
export default {
components:{'sheet-list':myMusicSheetList},
data () {
return {
sheetList:[{
id:1,
name:'我创建的歌单',
num:2,
details:[{
details_id:1,
details_name:'我喜欢的音乐',
details_num:30,
details_image:'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1521191038714&di=117b8f1d83605767e8a7faf01cb9be9b&imgtype=0&src=http%3A%2F%2Fimgsrc.baidu.com%2Fimgad%2Fpic%2Fitem%2F8435e5dde71190efc4376916c41b9d16fcfa602f.jpg'
},{
details_id:2,
details_name:'在欧洲田园般的乡村上骑单车',
details_num:15,
details_image:'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1521190642670&di=67822ec270160c1fb21e67d49e95a97f&imgtype=0&src=http%3A%2F%2Fpic30.nipic.com%2F20130615%2F2861027_140302450156_2.jpg'
}]
},{
id:2,
name:'我收藏的歌单',
num:2,
details:[{
details_id:1,
details_name:'这应该是你比较喜欢听的歌曲了',
details_num:10,
details_image:'https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=3679981803,1758706610&fm=27&gp=0.jpg'
},{
details_id:2,
details_name:'欧美风格的音乐，安静的听',
details_num:2,
details_image:'https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=2406805917,4090912031&fm=27&gp=0.jpg'
}]
}]
}
},
methods: {
},
mounted:function(){
}
}
</script>
<style scoped>
</style>
如果不能运行请检查import 路径是否正确。