javascript – 自定义音频播放器问题
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<!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 onl oad="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跳到第二首歌之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.任何帮助将不胜感激,谢谢.
解决方法:
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.
首先,变量如何工作？
一旦设置了var,就不需要在代码中使用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.代码中不再有var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轨道的更多信息.
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.而是创建一个可以帮助您返回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) + "%";
}
比一个播放/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个点击情况的函数：
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 – 你做完了！
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处理(“timeupdate”,progress);.
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