之前一个前端群里 大牛 做了一个自适应的HMLT5播放器
最近根据其思路做了一个相对单一移动端的demo，demo用的图片和歌曲json的数据设计 都是群里大牛做的，在这谢谢~；
同时借鉴的几篇文章：
慕课网 ： http://www.imooc.com/view/299 （这个我也没看完....）
leinov : http://www.cnblogs.com/leinov/p/3896772.html （完整的音频的解释demo）
陈在真 ：http://blog.sina.com.cn/s/blog_74d6cedd0102vkbr.html （也是这篇文章 让我在这次demo 里没有做音量控制和这个音量渐进、减退，因为感觉 没多大用....尤其是在手机端都有这个音控的按键前提下....）
上图：
上代码：
HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>HTML5 播放器</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="description" content="">
<meta name="apple-touch-fullscreen" content="yes" />
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" />
<meta content="no" name="apple-mobile-web-app-capable" />
<meta content="black" name="apple-mobile-web-app-status-bar-style" />
<meta content="telephone=no" name="format-detection" />
<style>
*{margin:0;padding:0;}
li{ list-style: none;}
a{ text-decoration: none;}
html,body{width:100%; height:100%; font-family: 'microsoft yahei', Arial, Helvetica, sans-serif;}
body{-webkit-tap-highlight-color: rgba(0,0,0,0); }
.tac{ text-align:center;}
.fl{ float:left;}
.fr{ float:right;} .body_bg{transition:opacity 0.5s ease-in; position:absolute;left:0;top:0; width:100%; height:100%; background-image:url(bg.jpg) 0 0 no-repeat; background-size: cover; opacity: 0;}
.body_bg.cur{opacity:1;}
.list_main{overflow-y: auto;}
.list_ul{ width:100%;}
.list_ul li{ position:relative; min-height: 55px; font-size: 14px; padding:0 20px; color:#fff; line-height: 20px;}
.list_ul li.cur{ color:#f48e4a;}
.list_line{ position:absolute;left:0;bottom:0; width:100%; height:1px; background: rgba(0,0,0,.3);}
.list_ul .music_mian{ position:absolute;top:50%;transform: translateY(-50%);}
.list_ul p{ font-size: 14px;}
.audio_main{ position:fixed; bottom:0;left:0; width:100%; height:100px;background:rgba(0,0,0,.3); }
.process_line{ position:relative; width:100%; height:3px; background-color: #fff; }
.progress_after{ position:absolute;left:0;top:0; width:0px; height:3px; background-color: #f48e4a;}
.process_main{ }
.music_time{ color:#fff; font-size: 12px;margin:5px;}
.music_btn{ position:absolute;bottom:0;left:50%; width:238px; transform: translateX(-50%);}
.music_btn a{ display:inline-block; width:60px; height:46px; background:url(player.png) no-repeat 0 0; font-size: 0;}
.music_btn .music_before{background-position:-143px 0; }
.music_btn .music_switch{ background-position:-68px 0;margin-right:20px;}
.music_btn .cur{ background-position:-68px -140px;}
.music_btn .music_after{background-position:0px 0;margin-right:20px;} .name_singer{ color:#fff; margin:5px; font-size:12px;}
.audio_dot{ position:absolute;left:0;top:-6px; width:14px; height:14px;border-radius: 50%; background:#fff;}
.audio_Bgdot{ position:absolute;left:-15px;top:-15px; width:44px; height:44px;background:rgba(0,0,0,0);}
.turn{ position:absolute;left: -36px;bottom: 12px; width:30px;height:30px; text-align:center;line-height: 30px; font-size: 14px; color:#fff;}
</style>
<script type="text/javascript" src="zepto.js"></script>
<script type="text/javascript" src="music.js"></script> <script type="text/javascript">
$(function(){ var audios = [
{
name:'知己',
singer:'未知',
src:'02.mp3',
cover:''
},
{
name:'暗号',
singer:'周杰伦',
src:'01.mp3',
cover:'cover.jpg'
},
{
name:'One Day.mp3',
singer:'Kodaline',
src:'03.mp3',
cover:''
},
{
name:'KOK',
singer:'未知',
src:'KOK.mp3',
cover:''
},
{
name:'一块红布',
singer:'',
src:'04.mp3',
cover:''
},
{
name:'Hall Of Fame ',
singer:'The Script Feat Will.I.Am',
src:'05.mp3',
cover:''
},
{
name:'Rumour Has It',
singer:'未知',
src:'06.mp3',
cover:''
},
{
name:'寻找',
singer:'*',
src:'08.mp3',
cover:''
},
{
name:'Rooftops',
singer:'Kris Allen',
src:'07.mp3',
cover:''
}
]; Music.init(audios); }); </script>
</head> <body style="background-image:url(bg.jpg); opacity:1; ">
<div class="body_bg" style="background-image:url(bg.jpg); opacity:1; "></div>
<div class="list_main" id="list_main">
<ul class="list_ul" id="list_ul"> </ul>
</div>
<div class="audio_main" id="audio_main">
<div class="process_main">
<div class="process_line" id="process_line">
<div class="progress_after" id="line_after"></div>
<div class="audio_dot" id="dot">
<div class="audio_Bgdot"></div>
</div>
</div>
</div>
<div class="fl music_time" id="time_start">00:00</div>
<div class="fr music_time" id="time_end">00:00</div>
<div class="tac name_singer" id="name_txt"></div>
<div class="tac name_singer" id="singer_txt"></div>
<div class="music_btn">
<a href="javascript:;" class="music_after" id="music_after"></a>
<a href="javascript:;" class="music_switch" id="music_switch"></a>
<a href="javascript:;" class="music_before" id="music_before"></a>
<div class="turn" id="turn">顺</div>
</div>
</div>
</body>
</html>
js:
var Music = {
init : function( data ){
this.data = [];//存储数据;
this.randomArr = [];
for( var i=0,len=data.length;i<len;i++ ) {
if( data[i].src ){
this.data.push( data[i] );
this.randomArr.push(i);
}
}
this._getElement(); //获取dom;
this.createAudio()//创建音频;
this.createMusicList(); //创建歌单;
},
_getElement : function(){
this.list_ul = $('#list_ul');
this.music_switch = $('#music_switch');
this.music_before = $('#music_before');
this.music_after = $('#music_after');
this.time_start = $('#time_start');
this.time_end = $('#time_end');
this.process_line = $('#process_line');
this.line_after = $('#line_after');
this.window = $(window);
this.bodybg = $('.body_bg');
this.dot = $('#dot');
this.turn = $('#turn');
this.trunNum = 0;
this._dot = document.getElementById('dot');
this._process_line = document.getElementById('process_line');
this.Time = null;
this.startPic = this.bodybg.css('backgroundImage');
this.dragBtn = false;
this.playing = false;
},
_bindElement : function(){
var that = this;
var that = this;
this.turn.click(function(){
that.trunNum++;
var status = that.trunNum % 3;
switch(status){
case 0:
that.turn.html('顺');
break;
case 1:
that.randomArr.sort(function(){
return Math.random()>0.5?-1:1;
});
that.turn.html('随');
break;
case 2:
that.turn.html('单');
break;
}
});
//下一首歌
this.music_before.click(function(){
that._beforeMusic();
});
//上一首歌
this.music_after.click(function(){
that._afterMusic()
});
this.music_switch.on('click',function(){
that._fnPlay();
});
this.lineW = this.process_line.width() - this.dot.width();
function _touchstart( event ){
that.dragBtn = true;
that.maxX = that.process_line.width() - that.dot.width();
event.stopPropagation();
}
function _touchmove( event ){
var touch = event.targetTouches[0];
var moverX = touch.pageX;
that.dragBtn = true;
moverX = moverX < 0 ? 0 : moverX;
moverX = moverX > that.maxX ? that.maxX : moverX;
that.dot.css('left',moverX);
that.line_after.css('width',moverX);
that.dragX = touch.pageX;
event.stopPropagation();
}
function _touchend( event ){
var touch = event.targetTouches[0];
event.stopPropagation();
_tapLine();
}
this.process_line.click(function(event){
var eX = event.clientX > that.lineW ? that.lineW : event.clientX;
that.dot.css('left',eX);
that.line_after.css('width',eX);
_tapLine();
});
function _tapLine(){
var l = parseFloat(that.dot.css('left'));
var maxL = parseFloat(that.lineW);
that._audio.currentTime = that._percentage( l,maxL,that._audio.duration);
clearInterval(that.Time);
that._musicTimer();
that.dragBtn = false;
}
this._dot.addEventListener('touchstart',_touchstart,false);
this._dot.addEventListener('touchmove',_touchmove,false);
this._dot.addEventListener('touchend',_touchend,false);
},
createAudio : function(){
var html = '<audio id="audio" >您的浏览器不支持音频元素。</audio>';
$('body').append(html);
this._audio = document.getElementById('audio');
},
createMusicList : function(){
var that = this;
var html = '';
var data = this.data;
this._getHeight();
for( var i=0,len=data.length;i<len;i++ ){
var name,singer,src,pic;
if( toStrings(data[i].name).length > 0){
name = toStrings(data[i].name);
}else{
name = '未知';
}
if( toStrings(data[i].singer).length > 0){
singer = toStrings(data[i].singer);
}else{
singer = '未知';
}
/*
if( data[i].cover ){
pic = data[i].cover;
}else{
pic = this.startPic;
}
*/
pic = data[i].cover;
src = data[i].src;
html += '<li music_index='+i+' music_name='+ name +' music_singer='+ singer +' music_src='+src+' music_pic='+ pic +'>'
+'<div class="music_mian">'
+ '<p class="music_name">'+name+'</p>'
+ '<p class="music_singer">'+singer+'</p>'
+ '</div>'
+ '<div class="list_line"></div>'
+'</li>';
}
this.list_ul.html(html);
//列表绑定事件；
this.list_ul.on('click','li',function(){
that._bindElement();//创建事件;
that._cutSongs(this);
});
//转换字符去掉空格；
function toStrings( txt ){
return txt.split(' ').join(' ').toString();
}
},
_afterMusic : function(){
var status = this.trunNum % 3;
var current = this.list_ul.find('.cur');
var index = current.index();
var maxLen = this.data.length-1;
var obj;
if( status == 0 || status == 2 ){
if( index == 0 ){
obj = this.list_ul.find('li').last();
}else if( index > 0 ){
obj = current.prev();
}
}else if( status == 1 ){
for(var i=0;i<maxLen;i++){
if( this.randomArr[i] == index ){
var num = i;
num--;
if( num <= 0 ){
num = maxLen;
}
obj = this.list_ul.find('li').eq(this.randomArr[num]);
}
}
}
this._cutSongs(obj);
},
_beforeMusic : function(){
var status = this.trunNum % 3;
var current = this.list_ul.find('.cur');
var index = current.index();
var maxLen = this.data.length-1;
var obj;
if( status == 0 || status == 2 ){
if( index == maxLen ){
obj = this.list_ul.find('li').first();
}else if( index < maxLen ){
obj = current.next();
}
}else if( status == 1 ){
for(var i=0;i<maxLen;i++){
if( this.randomArr[i] == index ){
var num = i;
num++;
if( num >= maxLen ){
num = 0
}
obj = this.list_ul.find('li').eq(this.randomArr[num]);
}
}
}
this._cutSongs(obj);
},
_cutSongs : function( obj ){
this.playing = true;
$(obj).addClass('cur').siblings('li').removeClass('cur');
var music_src = $(obj).attr('music_src');
var music_pic = $(obj).attr('music_pic');
var music_name = $(obj).attr('music_name');
var music_singer = $(obj).attr('music_singer');
$('#name_txt').html(music_name);
$('#singer_txt').html(music_singer);
if( music_pic ){
this.bodybg.attr('style','background-image:url('+music_pic+');' );
}else{
this.bodybg.css('backgroundImage',this.startPic+';');
}
this.bodybg.addClass('cur');
this._audio.src = music_src;
this._fnPlay();
},
_getHeight :function(){
var wH = $(window).height();
var mH = $('#audio_main').height();
var $musicMain = $('#list_main');
var h = wH - mH;
$musicMain.height(h);
},
_fnPlay : function(){
var that = this;
if( this._audio.paused ){
//判断是否重新加载歌曲
if(this.playing){
this._audio.load();
this.playing = false;
}
this._audio.play();
this.music_switch.addClass('cur');
this._audio.addEventListener('loadeddata',function(){
var timerMain = that._toTime(that._audio.duration);
var len = timerMain.split(':').length;
switch(len){
case 1:
that.time_start.html('00');
break;
case 2:
that.time_start.html('00:00');
break;
}
that.time_end.html(timerMain);
that._musicTimer();
},false);
}else{
this._audio.pause();
this.music_switch.removeClass('cur');
clearInterval(that.Time);
}
},
_percentage:function( a,b,c ){
return a/b*c;
},
_musicTimer : function(){
var that = this;
this.Time = setInterval(_snowTime,1000);
var timerMain = that._toTime(that._audio.duration);
var len = timerMain.split(':').length;
function _snowTime(){
if( that._audio.currentTime == that._audio.duration ){
clearInterval(that.Time);
var status = that.trunNum % 3;
switch(status){
case 0:
that._beforeMusic();
break;
case 1:
that._beforeMusic();
break;
case 2:
var current = that.list_ul.find('.cur');
that._cutSongs(current);
break;
}
}
if(!that.dragBtn){
var timerMain = that._toTime(that._audio.currentTime);
var l = that._percentage( that._audio.currentTime,that._audio.duration,parseFloat(that.lineW) );
that.dot.css('left',l);
that.line_after.css('width',l);
}
switch( len ){
case 1:
that.time_start.html(timerMain);
break;
case 2:
var timer = timerMain.indexOf(':')>0?timerMain:'00:'+timerMain;
that.time_start.html(timer);
break;
}
}
},
_toTime : function( time ){
var hour = Math.floor(time/3600);
var min = Math.floor(time%3600/60);
var sec = Math.floor(time%60);
var ih = hour <= 9 ? '0'+hour : hour;
var im = min <= 9 ? '0'+min :min;
var is = sec <= 9 ? '0'+sec :sec;
return ( ih > 0 ? ih+':' : '') + (im >0 ? im+':' :'') +is;
}
}
总结：
最开始想用 面向对象的方式写，但是后来还是觉得json单体的写法更实用
个人简单粗暴的判断方法是：
页面 单一功能的应用 就用 json单体；
页面 某功能多次调用 就用 面向对象 比如: tab选项卡、轮播之类的；
hml5 audio 的新的api 文上的连接讲比较详尽就不赘述了
遇到的个人一些小问题：
一：第一次用这个 zepto.js 感觉跟 jQuery 一样，不过这个 tap 的事件怎么绑定不上 后来还是用 click 代替了 之前听说在 click 在移动端有延迟 也因为是用了 zepto 库还没绑定上完全用的跟 JQuery 似的也让我很尴尬，同时也因为用了库在 dom 的获取也用了原生所以在这个dom存储上有所难以区分(当然我知道这对象可以转成原生，最后还是用了纯原生的方式获取),因为 audio 有很多新的属性 都需要原生；
二：单体的this 指向 需要不停的 存成 that在用 有点繁琐；
三：歌曲时间想做到小时以上 比如 : 01:02:05 这样 后来 在这个当前播放时间设置 _snowTime() 里 判断一句就是 _toTime()返回 当前播放秒数转成分钟形式的字符串 (如:00:00:00)里的":"的个数，在时间补零(00:00:05)上 还要在用这个 ':'做判断觉得恶心，后来看了酷狗的播放器上过小时的也是用分钟的形式展示(120:30)目前还没想到什么好一点解决方法，也可以说是目前的一个已知 bug 吧；
四：最初的功能方法上想的比较独立单一，起初以为 “上一首歌”，“下一首歌”，和“歌曲播放到最后的下一首歌” 都是 独立的 其“歌曲播放到最后的下一首歌”其实之分两种一种是单曲循环，第二种是“下一首歌” 所以 “歌曲播放到最后的下一首歌” 区分不是 “单曲循环” 模式 剩下都是 “下一首歌” 里的功能 在“下一首歌”里做这个 歌曲模式“随机”、“顺序”播放的下一首就可是了；
五：在做这个“歌曲进度”拖动的时候，和这个歌曲正常播放 设置 “歌曲进度” 的冲突，后来建立that.dragBtn 判断是拖动还是仅仅是歌曲进度的设置，同样的问题还有这个 当前歌曲的暂停之后的播放和切割之后的播放 是有所不同的，歌曲的切换时是换了audio的路径 需要audio.load() 从新加载才能播放同样创建了this.playing 来判断是否切歌；
六：歌曲模式的设置 最开始想多了 想建立一个 json {‘顺’，‘随’，‘单’} 做对应关系，后来发现 其实只需要一个 num 做累加取余去判断即可；
功能总结：顺序播放、随机播放、单曲循环、上下换歌、点击切歌、拖动歌曲的进度；
没做功能：没有音控、手机转屏从新设置....没怎么做适配，仅仅适配自己的手机，肯定还有Bug和代码如何在优化欢迎指出；
谢谢 大牛们 写的技术文章做过的demo的共享~