最近在使用vue做仿网易云音乐的项目，遇到了圆形进度条实现音乐播放的功能，所以我在这里总结一下，分享给大家我的实现方法。我这里主要是通过SVG的方式实现的。
效果图：
实现过程
一、实现步骤
- 圆形进度条的实现
- 音乐播放/暂停的控制
二、步骤分解
这里先放一下 audio标签引入音频文件的代码：
<audio src="/static/audios/周兴哲 - 你，好不好？.mp3" @timeupdate="timeupdate" id="audio" @ended="ended"></audio>
// 实时获取音频当前播放时长
timeupdate(e) {
// console.log("e===>", e.target.currentTime);
this.current = e.target.currentTime;
let duration = document.getElementsByTagName("audio")[0].duration;
let percent = Math.min(1, this.current / duration);
this.dashOffset = (1 - percent) * this.dashArray;
},
ended() {
console.log("播放结束~~~");
this.isStatus = false;
// 初始化 圆形进度条的周长
let circleWidth = document.getElementById("progressCircle").offsetWidth;
this.dashArray = Math.PI * circleWidth;
this.dashOffset = Math.PI * circleWidth;
},1. 圆形进度条的实现
这里通过SVG画两个一模一样的圆，设置一定的宽度，然后第二个圆使用stroke-dasharray和stroke-dashoffset来动态控制进度变化情况。stroke-dashoffset的变化情况要结合音乐的时长来设置。
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" id="mySvg">
<circle class="progress-background" cx="50%" cy="50%" r="50%" fill="transparent" />
<circle
class="progress-bar"
cx="50%"
cy="50%"
r="50%"
fill="transparent"
:stroke-dasharray="dashArray"
:stroke-dashoffset="dashOffset"
/>
</svg>
computed: {
// 实时监听播放进度
getDashOffset() {
let percent = 0;
if (document.getElementsByTagName("audio")[0]) {
// 计算播放进度比例
let duration = document.getElementsByTagName("audio")[0].duration;
percent = Math.min(1, this.current / duration);
this.dashOffset = (1 - percent) * this.dashArray;
} else {
this.dashOffset = (1 - 0) * this.dashArray;
}
}
},
mounted() {
this.$nextTick(() => {
// 初始化圆角周长
let circleWidth = document.getElementById("progressCircle").offsetWidth;
this.dashArray = Math.PI * circleWidth;
this.dashOffset = Math.PI * circleWidth;
});
}2. 音乐播放/暂停的控制
音乐的暂停和播放状态可以通过document.getElementById("audio").paused来判断，如果返回false则说明当前是播放状态，我们需要触发 document.getElementById("audio").pause()方法实现暂停操作，反之，触发document.getElementById("audio").play()方法实现播放操作。
// 操作音乐播放/暂停
let audio = document.getElementById("audio");
console.log("this.audio.paused===>", audio.paused);
if (audio.paused) {
audio.play();
} else {
audio.pause();
}下面方法全部的代码，大家可直接复制到自己的编辑器中运行（记得修改音频路径）
<template>
<div class="playmusic">
<div class="bottom-music">
<div class="music-lt">
<div class="lt-avator">
<img src="/static/img/avator.jpg" alt />
</div>
<div class="lt-title">
<span class="title">你，好不好？</span>
<span class="name">周兴哲</span>
</div>
</div>
<div class="music-rt">
<div class="progress-circle" id="progressCircle" @click="operation">
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" id="mySvg">
<circle class="progress-background" cx="50%" cy="50%" r="50%" fill="transparent" />
<circle
class="progress-bar"
cx="50%"
cy="50%"
r="50%"
fill="transparent"
:stroke-dasharray="dashArray"
:stroke-dashoffset="dashOffset"
/>
</svg>
<span
:class="isStatus?'iconfont icon-bofang3 icons':'iconfont icon-bofang2 icons icons1'"
></span>
</div>
<span class="iconfont icon-yinleliebiao menu"></span>
<audio src="/static/audios/周兴哲 - 你，好不好？.mp3" @timeupdate="timeupdate" id="audio" @ended="ended"></audio>
</div>
</div>
</div>
</template>
<script>
export default {
data() {
return {
dashArray: 0,
current: 0,
dashOffset: 0,
isStatus: false // 播放状态 false 暂停 true 播放
};
},
computed: {
// 实时监听播放进度条
getDashOffset() {
let percent = 0;
if (document.getElementsByTagName("audio")[0]) {
// 计算播放进度比例
let duration = document.getElementsByTagName("audio")[0].duration;
percent = Math.min(1, this.current / duration);
this.dashOffset = (1 - percent) * this.dashArray;
} else {
this.dashOffset = (1 - 0) * this.dashArray;
}
}
},
methods: {
// 实时获取音频当前播放时长
timeupdate(e) {
// console.log("e===>", e.target.currentTime);
this.current = e.target.currentTime;
let duration = document.getElementsByTagName("audio")[0].duration;
let percent = Math.min(1, this.current / duration);
this.dashOffset = (1 - percent) * this.dashArray;
},
ended() {
console.log("播放结束~~~");
this.isStatus = false;
// 初始化 圆形进度条的周长
let circleWidth = document.getElementById("progressCircle").offsetWidth;
this.dashArray = Math.PI * circleWidth;
this.dashOffset = Math.PI * circleWidth;
},
// 操作音乐播放/暂停
operation() {
console.log("播放/暂停音乐");
let audio = document.getElementById("audio");
console.log("this.audio.paused===>", audio.paused);
if (audio.paused) {
audio.play();
this.isStatus = true;
} else {
audio.pause();
this.isStatus = false;
}
}
},
mounted() {
this.$nextTick(() => {
// 初始化圆的周长
let circleWidth = document.getElementById("progressCircle").offsetWidth;
this.dashArray = Math.PI * circleWidth;
this.dashOffset = Math.PI * circleWidth;
});
}
};
</script>
<style lang="css" scoped>
.font {
font-family: PingFangSC-Regular, PingFang SC;
font-weight: 400;
}
.playmusic {
position: relative;
height: 100vh;
width: 100%;
}
.playmusic .bottom-music {
box-sizing: border-box;
padding: 0 0.64rem;
z-index: 999;
box-shadow: 5px 5px 5px 5px #efefef, -5px 5px 5px 5px rgba(255, 255, 255, 0.5);
}
.playmusic .bottom-music {
height: 3.41333333rem;
width: 100%;
position: fixed;
left: 0;
bottom: 0;
display: flex;
justify-content: space-around;
align-items: center;
background-color: #ffffff;
}
.playmusic .bottom-music .music-lt {
flex: 1;
display: flex;
align-items: center;
justify-content: start;
width: 70%;
overflow: hidden;
}
.playmusic .bottom-music .music-lt .lt-avator {
width: 2.13333333rem;
height: 2.13333333rem;
border-radius: 50%;
overflow: hidden;
}
.playmusic .bottom-music .music-lt .lt-avator img {
width: 100%;
height: 100%;
display: block;
}
.playmusic .bottom-music .music-lt .lt-title {
padding: 0 0.42666667rem;
width: 80%;
}
.playmusic .bottom-music .music-lt .lt-title span {
display: block;
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
font-family: PingFangSC-Regular, PingFang SC;
font-weight: 400;
}
.playmusic .bottom-music .music-lt .lt-title .title {
font-size: 0.59733333rem;
font-weight: 600;
color: #333;
}
.playmusic .bottom-music .music-lt .lt-title .name {
font-size: 0.46933333rem;
color: #666;
}
.playmusic .bottom-music .music-rt {
display: flex;
justify-content: end;
align-items: center;
}
.playmusic .bottom-music .music-rt .progress-circle {
width: 1.92rem;
height: 1.92rem;
position: relative;
}
.playmusic .bottom-music .music-rt .progress-circle circle {
stroke-width: 0.14933333rem;
transform-origin: center;
}
.playmusic .bottom-music .music-rt .progress-circle .progress-background {
transform: scale(0.9);
stroke: rgba(212, 68, 57, 0.5);
}
.playmusic .bottom-music .music-rt .progress-circle .progress-bar {
transform: scale(0.9) rotate(-90deg);
stroke: #d44439;
}
.playmusic .bottom-music .music-rt .progress-circle .icons {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: #d44439;
}
.playmusic .bottom-music .music-rt .progress-circle .icons {
font-size: 1.17333333rem;
}
.playmusic .bottom-music .music-rt .progress-circle .icons1 {
font-size: 0.96rem;
}
.playmusic .bottom-music .music-rt .menu {
font-size: 1.70666667rem;
color: #d44439;
font-weight: 500;
}
.playmusic .bottom-music .music-rt .menu {
padding-left: 0.85333333rem;
}
</style>以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
