html 代码
<div class="audio-wrapper">
<audio>
<source src="Files/Audio/-08/e259d760-5f1a-4ae0-a838-34d237ea93cc.mp3" type="audio/mp3">
</audio>
<div class="audio-left"></div>
<div class="audio-right">
<p style="max-width: 536px;">Beta-B_Kan R. Gao.mp3</p>
<div class="progress-bar-bg" id="progressBarBg"><span id="progressDot"></span>
<div class="progress-bar" id="progressBar"></div>
</div>
<div class="audio-time"><span class="audio-length-current" id="audioCurTime">00:00</span><span class="audio-length-total">01:06</span></div>
</div>
</div>
css 代码
.audio-wrapper {
background-color: #fcfcfc;
margin: 10px auto;
max-width: 670px;
height: 70px;
border: 1px solid #e0e0e0;
}
.audio-left {
float: left;
text-align: center;
width: 18%;
height: 100%;
}
.audio-left img {
width: 40px;
position: relative;
top: 15px;
margin: 0;
display: initial; /* 解除与app的样式冲突 */
cursor: pointer;
}
.audio-right {
margin-right: 2%;
float: right;
width: 80%;
height: 100%;
}
.audio-right p {
font-size: 15px;
height: 35%;
margin: 8px 0;
/* 歌曲名称只显示在一行，超出部分显示为省略号 */
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
max-width: 243px; /* 要适配小屏幕手机，所以最大宽度先设小一点，后面js根据屏幕大小重新设置 */
}
.progress-bar-bg {
background-color: #d9d9d9;
position: relative;
height: 2px;
cursor: pointer;
}
.progress-bar {
background-color: #649fec;
width: 0;
height: 2px;
}
.progress-bar-bg span {
content: " ";
width: 10px;
height: 10px;
border-radius: 50%;
-moz-border-radius: 50%;
-webkit-border-radius: 50%;
background-color: #3e87e8;
position: absolute;
left: 0;
top: 50%;
margin-top: -5px;
margin-left: -5px;
cursor: pointer;
}
.audio-time {
overflow: hidden;
margin-top: -1px;
}
.audio-length-total {
float: right;
font-size: 12px;
}
.audio-length-current {
float: left;
font-size: 12px;
}
js代码
document.addEventListener('DOMContentLoaded', function () {
// 设置音频文件名显示宽度
var element = document.querySelector('.audio-right');
var maxWidth = window.getComputedStyle(element, null).width;
document.querySelector('.audio-right p').style.maxWidth = maxWidth;
// 初始化音频控制事件
initAudioEvent();
}, false);
function initAudioEvent() {
var audio = document.getElementsByTagName('audio')[0];
var audioPlayer = document.getElementById('audioPlayer');
// 点击播放/暂停图片时，控制音乐的播放与暂停
audioPlayer.addEventListener('click', function () {
// 监听音频播放时间并更新进度条
audio.addEventListener('timeupdate', function () {
updateProgress(audio);
}, false);
// 监听播放完成事件
audio.addEventListener('ended', function () {
audioEnded();
}, false);
// 改变播放/暂停图片
if (audio.paused) {
// 开始播放当前点击的音频
audio.play();
audioPlayer.src = './image/pause.png';
} else {
audio.pause();
audioPlayer.src = './image/play.png';
}
}, false);
// 点击进度条跳到指定点播放
// PS：此处不要用click，否则下面的拖动进度点事件有可能在此处触发，此时e.offsetX的值非常小，会导致进度条弹回开始处（简直不能忍！！）
var progressBarBg = document.getElementById('progressBarBg');
progressBarBg.addEventListener('mousedown', function (event) {
// 只有音乐开始播放后才可以调节，已经播放过但暂停了的也可以
if (!audio.paused || audio.currentTime != 0) {
var pgsWidth = parseFloat(window.getComputedStyle(progressBarBg, null).width.replace('px', ''));
var rate = event.offsetX / pgsWidth;
audio.currentTime = audio.duration * rate;
updateProgress(audio);
}
}, false);
// 拖动进度点调节进度
dragProgressDotEvent(audio);
}
/**
* 鼠标拖动进度点时可以调节进度
* @param {*} audio
*/
function dragProgressDotEvent(audio) {
var dot = document.getElementById('progressDot');
var position = {
oriOffestLeft: 0, // 移动开始时进度条的点距离进度条的偏移值
oriX: 0, // 移动开始时的x坐标
maxLeft: 0, // 向左最大可拖动距离
maxRight: 0 // 向右最大可拖动距离
};
var flag = false; // 标记是否拖动开始
// 鼠标按下时
dot.addEventListener('mousedown', down, false);
dot.addEventListener('touchstart', down, false);
// 开始拖动
document.addEventListener('mousemove', move, false);
document.addEventListener('touchmove', move, false);
// 拖动结束
document.addEventListener('mouseup', end, false);
document.addEventListener('touchend', end, false);
function down(event) {
if (!audio.paused || audio.currentTime != 0) { // 只有音乐开始播放后才可以调节，已经播放过但暂停了的也可以
flag = true;
position.oriOffestLeft = dot.offsetLeft;
position.oriX = event.touches ? event.touches[0].clientX : event.clientX; // 要同时适配mousedown和touchstart事件
position.maxLeft = position.oriOffestLeft; // 向左最大可拖动距离
position.maxRight = document.getElementById('progressBarBg').offsetWidth - position.oriOffestLeft; // 向右最大可拖动距离
// 禁止默认事件（避免鼠标拖拽进度点的时候选中文字）
if (event && event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
// 禁止事件冒泡
if (event && event.stopPropagation) {
event.stopPropagation();
} else {
window.event.cancelBubble = true;
}
}
}
function move(event) {
if (flag) {
var clientX = event.touches ? event.touches[0].clientX : event.clientX; // 要同时适配mousemove和touchmove事件
var length = clientX - position.oriX;
if (length > position.maxRight) {
length = position.maxRight;
} else if (length < -position.maxLeft) {
length = -position.maxLeft;
}
var progressBarBg = document.getElementById('progressBarBg');
var pgsWidth = parseFloat(window.getComputedStyle(progressBarBg, null).width.replace('px', ''));
var rate = (position.oriOffestLeft + length) / pgsWidth;
audio.currentTime = audio.duration * rate;
updateProgress(audio);
}
}
function end() {
flag = false;
}
}
/**
* 更新进度条与当前播放时间
* @param {object} audio - audio对象
*/
function updateProgress(audio) {
var value = audio.currentTime / audio.duration;
document.getElementById('progressBar').style.width = value * 100 + '%';
document.getElementById('progressDot').style.left = value * 100 + '%';
document.getElementById('audioCurTime').innerText = transTime(audio.currentTime);
}
/**
* 播放完成时把进度调回开始的位置
*/
function audioEnded() {
document.getElementById('progressBar').style.width = 0;
document.getElementById('progressDot').style.left = 0;
document.getElementById('audioCurTime').innerText = transTime(0);
document.getElementById('audioPlayer').src = './image/play.png';
}
/**
* 音频播放时间换算
* @param {number} value - 音频当前播放时间，单位秒
*/
function transTime(value) {
var time = "";
var h = parseInt(value / 3600);
value %= 3600;
var m = parseInt(value / 60);
var s = parseInt(value % 60);
if (h > 0) {
time = formatTime(h + ":" + m + ":" + s);
} else {
time = formatTime(m + ":" + s);
}
return time;
}
/**
* 格式化时间显示，补零对齐
* eg：2:4 --> 02:04
* @param {string} value - 形如 h:m:s 的字符串
*/
function formatTime(value) {
var time = "";
var s = value.split(':');
var i = 0;
for (; i < s.length - 1; i++) {
time += s[i].length == 1 ? ("0" + s[i]) : s[i];
time += ":";
}
time += s[i].length == 1 ? ("0" + s[i]) : s[i];
return time;
}
