HTML5 播放器

以前一個前端羣裏 大牛 作了一個自適應的HMLT5播放器 javascript

最近根據其思路作了一個相對單一移動端的demo,demo用的圖片和歌曲json的數據設計 都是羣裏大牛作的,在這謝謝~;css

 

同時借鑑的幾篇文章:html

慕課網 : http://www.imooc.com/view/299 (這個我也沒看完....)前端

leinov  : http://www.cnblogs.com/leinov/p/3896772.html (完整的音頻的解釋demo)java

陳在真 :http://blog.sina.com.cn/s/blog_74d6cedd0102vkbr.html (也是這篇文章 讓我在此次demo 裏沒有作音量控制和這個音量漸進、減退,由於感受 沒多大用....尤爲是在手機端都有這個音控的按鍵前提下....)ios

 

上圖:web

 

上代碼:json

HTML:api

<!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:'暗號',
                singer:'周杰倫',
                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:'一塊紅布',
                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:'尋找',
                singer:'李志',
                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"></div>
            </div> 
    </div>
</body>
</html>

js:瀏覽器

var Music = {
    init            : function( data ){
        this.data = [];//存儲數據;
        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(); //獲取dom;
        this.createAudio()//建立音頻;
        this.createMusicList(); //建立歌單;

    },
    _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('順');
                break;
                case 1:
                    that.randomArr.sort(function(){
                        return Math.random()>0.5?-1:1;
                    });
                    that.turn.html('隨');
                break;
                case 2: 
                    that.turn.html('單');
                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" >您的瀏覽器不支持音頻元素。</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);

        //列表綁定事件;
        this.list_ul.on('click','li',function(){
            
            that._bindElement();//建立事件;
            that._cutSongs(this);

        });
        
        //轉換字符去掉空格;
        function toStrings( txt ){
            return txt.split(' ').join('&nbsp;').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 ){

                //判斷是否從新加載歌曲    
                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;
    }
}

 

總結:

最開始想用 面向對象的方式寫,可是後來仍是以爲json單體的寫法更實用

我的簡單粗暴的判斷方法是:

頁面 單一功能的應用 就用 json單體;

頁面 某功能屢次調用 就用 面向對象 好比: tab選項卡、輪播之類的;

hml5 audio 的新的api 文上的鏈接講比較詳盡就不贅述了

遇到的我的一些小問題:

 一:第一次用這個 zepto.js 感受跟 jQuery 同樣,不過這個 tap 的事件怎麼綁定不上 後來仍是用 click 代替了 以前據說在 click 在移動端有延遲 也由於是用了 zepto 庫還沒綁定上徹底用的跟 JQuery 似的也讓我很尷尬,同時也由於用了庫在 dom 的獲取也用了原生因此在這個dom存儲上有所難以區分(固然我知道這對象能夠轉成原生,最後仍是用了純原生的方式獲取),由於 audio 有不少新的屬性 都須要原生;

 二:單體的this 指向 須要不停的 存成 that在用 有點繁瑣;

 三:歌曲時間想作到小時以上 好比 : 01:02:05 這樣 後來 在這個當前播放時間設置 _snowTime() 裏 判斷一句就是 _toTime()返回 當前播放秒數轉成分鐘形式的字符串 (如:00:00:00)裏的":"的個數,在時間補零(00:00:05)上 還要在用這個 ':'作判斷以爲噁心,後來看了酷狗的播放器上太小時的也是用分鐘的形式展現(120:30)目前還沒想到什麼好一點解決方法,也能夠說是目前的一個已知 bug 吧;

四:最初的功能方法上想的比較獨立單一,起初覺得 「上一首歌」,「下一首歌」,和「歌曲播放到最後的下一首歌」 都是 獨立的 其「歌曲播放到最後的下一首歌」其實之分兩種一種是單曲循環,第二種是「下一首歌」 因此 「歌曲播放到最後的下一首歌」 區分不是 「單曲循環」 模式 剩下都是 「下一首歌」 裏的功能 在「下一首歌」裏作這個 歌曲模式「隨機」、「順序」播放的下一首就但是了;

五:在作這個「歌曲進度」拖動的時候,和這個歌曲正常播放 設置 「歌曲進度」 的衝突,後來創建that.dragBtn 判斷是拖動仍是僅僅是歌曲進度的設置,一樣的問題還有這個 當前歌曲的暫停以後的播放和切割以後的播放 是有所不一樣的,歌曲的切換時是換了audio的路徑 須要audio.load() 重新加載才能播放一樣建立了this.playing 來判斷是否切歌;

六:歌曲模式的設置 最開始想多了 想創建一個 json {‘順’,‘隨’,‘單’} 作對應關係,後來發現 其實只須要一個 num 作累加取餘去判斷便可;

 

功能總結:順序播放、隨機播放、單曲循環、上下換歌、點擊切歌、拖動歌曲的進度;

沒作功能:沒有音控、手機轉屏重新設置....沒怎麼作適配,僅僅適配本身的手機,確定還有Bug和代碼如何在優化歡迎指出;

 

謝謝 大牛們 寫的技術文章作過的demo的共享~

相關文章
相關標籤/搜索