<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style type="text/CSS">
#custom{
font-family: monospace;
font-size: 16px;
max-width: 650px;
border-style: solid;
border-color: black;
border-width: 1px;
border-radius: 5px;
padding: 8px;
padding-bottom: 15px;
padding-left: 12px;
padding-right: 12px;
}
img{
margin-top: 3px;
float: left;
}
#bar, #currentTime, #duration, #skip{
display: inline-block;
}
#currentTime, #duration, #skip{
margin: 0px;
padding: 0px;
margin-top: 3px;
margin-left: 10px;
}
#bar{
margin-top: 10px;
height: 14px;
width: 400px;
background: lightgrey;
border-radius: 50px;
margin-left: 9px;
}
#slider{
height: 14px;
width: 15px;
background: black;
border-radius: 50px;
}
</style>
</head>
<body onLoad="count()">
<script type="text/javascript">
var track = 0;
function count(){
var music = document.getElementById("myAudio");
var duration = music.duration;
var durationInMins = Math.floor(duration/60);
var durationInSecs = Math.floor(duration-(durationInMins*60));
if(durationInSecs < 10){
var durationInSecs = "0" + durationInSecs;
}
if(durationInMins < 10){
var durationInMins = "0" + durationInMins;
}
document.getElementById("duration").innerHTML = durationInMins + ":" + durationInSecs;
var timer = setInterval(
function(){
var music = document.getElementById("myAudio");
var currentTime = music.currentTime;
if(currentTime > 60){
var min = Math.floor(currentTime/60);
var sec = Math.floor(currentTime-(min*60));
}else{
var min = "0";
var sec = Math.floor(music.currentTime); }
if(sec < 10){
var sec = "0" + sec;
}
if(min < 10){
var min = "0" + min;
}
document.getElementById("currentTime").innerHTML = min + ":" + sec; var percent = 100 * (music.currentTime/duration) - 2;
document.getElementById("slider").style.marginLeft=percent + "%";
}
, 1000);
}
function toggleP(){
var music = document.getElementById("myAudio");
if(music.paused == true){
music.play();
}else if(music.paused == false){
music.pause();
}
}
function skip(){
var trackList = ["http://fidelak.free.fr/reprises/The%20Doors%20-%20People%20are%20Strange.mp3", "http://mp3light.net/assets/songs/14000-14999/14781-december-1963-oh-what-a-night-four-seasons--1411568407.mp3"];
if(go == "back"){
track = track - 1;
}
if(go == "forward"){
track = track + 1;
}
var aa = clearInterval("timer");
var music = document.getElementById("myAudio");
music.pause();
music.src=trackList[track];
music.load();
var a = setTimeout(function(){music.play(); count();} , 6000);
}
</script>
<audio id="myAudio" src="http://fidelak.free.fr/reprises/The%20Doors%20-%20People%20are%20Strange.mp3">
</audio>
<br>
<div id="custom">
<img onClick="toggleP()" src="img/media-play-pause-resume.png" height="30px"/>
<p id="currentTime">00:00</p>
<div id="bar">
<div id="slider"></div>
</div>
<p id="duration">00:00</p>
<p id="skip"><strong><a onClick="go = 'back'; skip()"><<</a> <a onClick="go = 'forward'; skip()">>></a><strong></p>
</div>
</body>
有人能告诉我为什么在你跳到第二首歌后，歌曲持续时间滑块会向前和向后跳跃？为什么持续时间栏不能向下移动margin-top而不用移动所有内容。我只是想不出来。非常感谢任何帮助，谢谢。
答案 0 :(得分：2)
<强> jsBin demo
不要在HTML中使用内联JS ！使代码难以调试。保持逻辑远离您的演示文稿/模板。
从一开始，变量如何运作？
设置var后，无需使用代码中的var再次实例化相同的var。只需使用/修改它。所以一旦你设置在顶部
function el(id){return document.getElementById(id);} // Helps get easily an element
var el_music = el("myAudio"), // see?
el_trackInfo= el("trackInfo"),
el_duration = el("duration"),
el_currTime = el("currentTime"),
el_slider = el("slider"),
el_prev = el("prev"), // assign ID to your prev/next buttons!
el_next = el("next"),
el_togg = el("toggle"),
currentTime,
trackList = [],
track = -1, // Later we'll set it to 0 index triggering auto start
totTrack = trackList.length;
...你很高兴。您的代码中不再包含var个语句。
您可能希望向用户显示更多信息 存储数据的好方法是创建具有所需属性的对象：
trackList = [
{
artist : "The Doors",
fileName : "People Are Strange",
file : "http://fidelak.free.fr/reprises/The%20Doors%20-%20People%20are%20Strange.mp3"
},
{
artist : "ACDC",
fileName : "Back In Black",
file : "http://upload.wikimedia.org/wikipedia/en/4/45/ACDC_-_Back_In_Black-sample.ogg"
},
{
artist : "Four Seasons",
fileName : "Oh What A Night",
file : "http://mp3light.net/assets/songs/14000-14999/14781-december-1963-oh-what-a-night-four-seasons--1411568407.mp3"
}
]
现在，您不仅可以获得所需的音频路径，还可以向用户显示有关曲目的更多信息。
不要重复自己。计算遍布整个地方的时间会使您的代码不是模块化的，而是混乱的。而是创建一个能够帮助您return所需格式化时间的函数：
function getTime(t) { // `t` is some time value
var m = ~~(t / 60),
s = ~~(t % 60);
return (m<10?"0"+m:m) +':'+ (s<10?"0"+s:s); // returns i.e: "01:25"
}
创建一个进度函数，如：
function progress() {
el_currTime.innerHTML = getTime(el_music.currentTime); // see how our getTime fn is used?
el_duration.innerHTML = getTime(el_music.duration);
el_slider.style.marginLeft = Math.floor(100/el_music.duration*el_music.currentTime) + "%";
}
比播放/暂停一个：
function playPause(){
var isPaused = el_music.paused;
el_music[isPaused ? "play" : "pause"]();
el_togg.innerHTML = isPaused ? "❚❚" : "►" ;
}
对于PREV / NEXT，为您的按钮id="prev"和id="next"分配ID，然后再次创建一个能够处理两种点击情况的函数：
function skip(){ // This gets triggered by both prev / next buttons.
track = this.id==="next" ? ++track : --track; // Next clicked' increment, else decr.
track = track < 0 ? totTrack-1 : track%totTrack; // Allows you to loop infinitely the index
var trackToPlay = trackList[ track ]; // Get the Track Object "{}"
el_trackInfo.innerHTML = trackToPlay.artist+' '+trackToPlay.fileName;
el_music.src = trackToPlay.file;
el_music.addEventListener('canplaythrough', el_music.play);
}
信不信由你 - 你已经完成了！
拥有所有这些漂亮的功能，你现在需要的是一些事件监听器：
el_prev.addEventListener("click", skip);
el_next.addEventListener("click", skip);
el_togg.addEventListener("click", playPause);
el_music.addEventListener("timeupdate", progress);
el_music.addEventListener("ended", playPause);
el_next.click(); // Auto Start playing!
现在你可能想知道你的间隔1000功能在哪里消失了？它只是由el_music.addEventListener("timeupdate", progress);处理。
答案 1 :(得分：1)
跳过可能是因为间隔从未停止，并且仍然在前一首歌中运行。