注意: methods和computed里的东西不能重名
<div id='app'>
<audio :src="currentSrc" controls autoplay @ended='handleEnded'></audio>
<ul>
<li :class='{active:index===currentIndex}' v-for='(item,index) in musicData' :key='item.id'
@click='handleClick(item.songSrc,index)'>
<h2>{{item.id}}-歌名:{{item.name}}</h2>
<p>{{item.author}}</p>
</li>
</ul>
<button @click='handleNext'>下一首</button>
</div>
<script src="./vue.js"></script>
<script>
const musicData = [{
id: 1,
name: '杨宗纬 - 空白格',
author: '杨宗纬',
songSrc: '杨宗纬 - 空白格 (Live).mp3'
},
{
id: 2,
name: '杨宗纬 - 其实都没有',
author: '杨宗纬',
songSrc: '杨宗纬 - 其实都没有.flac'
},
{
id: 3,
name: '杨宗纬 - 我想要',
author: '杨宗纬',
songSrc: '杨宗纬 - 我想要 (Live).flac'
}
];
new Vue({
el: '#app',
data: {
musicData,
currentSrc: '杨宗纬 - 空白格 (Live).mp3',
currentIndex: 0
},
methods: {
handleClick(src, index) {
this.currentSrc = src;
this.currentIndex = index;
},
handleEnded() {
// // 下一首的播放
// this.currentIndex++;
// this.currentSrc = this.musicData[this.currentIndex].songSrc;
this.handleNext();
},
handleNext() {
this.currentIndex++;
if (this.currentIndex === this.musicData.length) {
this.currentIndex = 0;
}
this.currentSrc = this.musicData[this.currentIndex].songSrc
}
}
})
</script>
总结: 使用计算机属性还是methods取决于你是否需要缓存,当遍历大数组和做大量计算时,应当使用计算机属性,除非你不希望得到缓存。