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JS+Audio实现简单音乐播放器(-)

JS+Audio实现简单音乐播放器(-)

作者: 谁吃了我的薯条 | 来源:发表于2017-09-28 18:18 被阅读0次

    title: JS实现音乐播放器
    date: 2017-05-08 22:54:22
    categories: blog
    tags: blog


    回首向来萧瑟处,也无风雨也无穷!

    JS+Audio实现简单音乐播放器(-)

    H5新增<audio>标签
    加之最近一直苦修JS函数及Dom操作,便萌发做一款简单音乐播放器V00版(未来会逐渐完善,比如加入更多资源、新增爬虫爬去音乐库),废话不说直接上程序;

    1、Html程序
    <div id="Music" class="Music">
        <p id="head" class="head">
            Yesterday once more...
        </p>
        <div id="body" class="body">
            <div class="l" >
                ![](imgs/ZhuHai.jpg)
            </div>
            <p>yestoday once more...</p>
            <ul id="Timer" class="Timer">
                <li>0:00</li>
                <li>
                   <div class="chose" id="chose"></div>
                </li>
                <li></li>
            </ul>
        </div>
        <div id="floor" class="floor">
            <audio src="music/McBlog.mp3" ></audio>  //此处放置音乐资源
            <p>Top</p>
            <p>Open</p>
            <p>Next</p>
        </div>
    </div>
    

    简单实现如下图:


    Music
    2、CSS样式如下:
      *{
            padding: 0;
            margin: 0;
        }
      .Music{
          margin: 20px;
          width: 300px;
          height: 450px;
          background-color:white;
          box-shadow: 0 0 5px gray;
          display: flex;
          flex-direction: column;
          text-align: center;
          justify-content: space-between;
      }
        .head{
           display: block;
           text-align: center;
           height: 30px;
           line-height: 30px;
           width: 200px;
           padding: 20px 50px;
           flex-grow: 0;
        }
        .body{
           padding: 20px 60px;
           flex-grow: 1;
             }
        .l{
            width: 180px;
            height: 180px;
            border-radius: 100px;
            overflow: hidden;
        }
        .l img{
            height: 100%;
        }
        ul{
            list-style: none;
            display: flex;
            flex-direction: row;
            height: 20px;
            line-height: 20px;
        }
        ul li:nth-child(1),ul li:nth-child(3){
            width: 40px;
            text-align:center;
            flex-grow: 0;
        }
        ul li:nth-child(2){
            width: 6px;
            padding: 5px;
            border-radius: 3px;
            flex-grow: 1;
        }
        .chose{
            height: 8px;
            border-radius: 3px;
            background-color: green;
            margin: 1px 0;
            width: 0px;
        }
        .body p{
            width: 180px;
            height: 40px;
            text-align: center;
            line-height: 40px;
        }
        .floor{
            height: 60px;
            padding: 20px;
            text-align: center;
            display: flex;
            flex-direction: row;
            flex-grow: 0;
            align-items: center;
        }
        .floor p{
            width:80px ;
            transition: color 1000ms,background-color 1000ms;
        }
        .floor p:hover{
            background-color: green;
            color: white;
        }
    
    3、JS程序如下:核心为audio部分属性;
     window.onload=function () {
            var pop=document.getElementById('floor').getElementsByTagName('p');
            var video=document.getElementsByTagName('audio');
            var Timer=document.getElementById('Timer').getElementsByTagName('li');
            var chose=document.getElementById('chose');
            var l=document.getElementById('l');
            pop[1].addEventListener('click',Music,false);
            video[0].addEventListener('canplay',Timecontrol,false)  //监听音乐就绪后动作改变!
            function Music() {        //此函数判断音乐是否播放!
                if(video[0].paused){
                    video[0].play();
                    pop[1].innerText="Close";
                }
                 else{
                    video[0].pause();
                    pop[1].innerText="Open";
                }
            }
            function Timecontrol(){     //实现音乐进度条及音乐播放时间; 
                var j=0;
                var long=video[0].duration;
                var longs=parseInt(long/60)+':'+parseInt(long%60);
                var settimer=null;
                clearInterval(settimer);
                var settimer=setInterval(loading,1000);
                function loading(){
                   var currenttimer=video[0].currentTime;
                   if(currenttimer>long){
                       clearInterval(settimer);
                   }
                   else {
                   var j=(currenttimer/long).toFixed(2)*90;
                   if(video[0].paused&&currenttimer==0){
                       Timer[2].innerText="";
                   }
                   else{
                       Timer[2].innerText=longs;
                       var rot=j*8;
                       console.log(rot);
                       l.style.webkitTransform= "rotate("+rot +"deg)";
                   }
                    var start=parseInt(currenttimer/60);
                    var end=parseInt(currenttimer%60);
                    if(end<10){
                        end='0'+end;
                    }
                    var start=start+':'+end;
                   Timer[0].innerText=start;
                   chose.style.width=j+'px';
               }
            }
            }
        }
    
    4、下一部分实现重点:

    A、歌曲切换功能;
    B、完善背景图片随音乐节奏旋转功能;
    C、尝试增加各音阶的播放动画;
    D、初步的Python爬虫爬取学习笔记及实例;
    ---以上内容,预计在5/30日更新,下一篇为JS基本缓冲动画;

    加油,吾辈当共勉;!!!

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