jquery实现直播视频弹幕效果

JQ实现弹幕效果，快来吐糟你的想法吧

代码如下，复制即可使用：

<!DOCTYPE html>

<html>

 <head>

  <meta charset="utf-8" />

  <title>JQ实现弹幕效果</title>

  <style type="text/css">

   *{

    padding: 0;

    margin: 0;

   }

   #box{

    height:700px;

    width:1000px;

    margin: 0 auto;

    border:1px solid #000000;

    position: relative;

   }

   #main{

    width:100%;

    height:605px;

    position: relative;

    overflow: hidden;

   }

   p{

    position: absolute;

    left:1000px;

    width:200px;

    top:0;

   }

   #bottom{

    width:100%;

    height:80px;

    background: #ABCDEF;

    text-align: center;

    padding-top: 15px;

    position: absolute;

    left: 0;

    bottom: 0;

   }

   #txt{

    width:300px;

    height:50px; 

   }

   #btn{

    width:100px;

    height:50px;    

   }

  </style>

 </head>

 <body>

  <div id="box">

   <div id="main">

     

   </div>

   <div id="bottom">

    <input type="text" id="txt" placeholder="请输入内容" />

    <input type="button" id="btn" value="发射" />

   </div>

  </div>

  <script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>

  <script type="text/javascript">

   $(function(){

    var pageH=parseInt($("#main").height());

    var colorArr=["#cfaf12","#12af01","#981234","#adefsa","#db6be4","#f5264c","#d34a74"];    

    $("#btn").bind("click",auto);

    document.onkeydown=function(e){

     if(e.keyCode == 13){

      auto();

     }

    };

    function auto(){

     var $value = $("#txt").val();

     $("#main").append("<p>" + $value + "</p>");

     $("#txt").val("");

     var _top=parseInt(pageH*(Math.random()));

     var num=parseInt(colorArr.length*(Math.random()));

     $("p:last-child").css({"top":_top,"color":colorArr[num],"font-size":"20px"});

     $("p:last-child").animate({"left":"-200px"},10000);

     $("p:last-child").stop().animate({"left":"-300px"},10000,"linear",function(){

      $(this).remove();

     });    

     //console.log($value);

    };

     

   })

  </script>

 </body>

</html>

实例扩展：

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title></title>
  <style type="text/css">
    html, body {
      margin: 0px;
      padding: 0px;
      width: 100%;
      height: 100%;
      font-family: "微软雅黑";
      font-size: 62.5%;
    }
 
    .boxDom {
      width: 100%;
      height: 100%;
      position: relative;
      overflow: hidden;
    }
 
    .idDom {
      width: 100%;
      height: 10%;
      background: #666;
      position: fixed;
      bottom: 0px;
    }
 
    .content {
      display: inline-block;
      width: 460px;
      height: 40px;
      position: absolute;
      left: 0px;
      right: 0px;
      top: 0px;
      bottom: 0px;
      margin: auto;
    }
 
    .title {
      display: inline;
      font-size: 4em;
      vertical-align: bottom;
      color: #fff;
    }
 
    .text {
      border: none;
      width: 300px;
      height: 30px;
      border-radius: 5px;
      font-size: 2.4em;
    }
 
    .btn {
      width: 60px;
      height: 30px;
      background: #f90000;
      border: none;
      color: #fff;
      font-size: 2.4em;
    }
 
    span {
      height: 40px;
      position: absolute;
      overflow: hidden;
      color: #000;
      font-size: 4em;
      line-height: 1.5em;
      cursor: pointer;
      white-space: nowrap;
    }
    #boxDom video{
      width: 80%;
      height: 90%;
      float: left;
    }
    #boxDom .list-info{
      width: 20%;
      height: 90%;
      float: left;
      background-color: #666;
      overflow-y: auto;
      overflow-x: hidden;
      position: relative;
      z-index: 999;
    }
    .list-info p{
      font-size: 15px;
      line-height: 20px;
      border-bottom: 1px dashed #ccc;
      text-indent: 2em;
      color: #fff;
    }
 
  </style>
</head>
<body>
<div class="boxDom" id="boxDom">
  <video controls="controls" src="movie/10_2fdd2bbcd15c68497744f07d4527cef2_3.mp4"></video>
  <div class="list-info"> </div>
  <div class="idDom" id="idDom">
    <div class="content">
      <p class="title">吐槽:</p>
      <input type="text" class="text" id="text"/>
      <button type="button" class="btn" id="btn">发射</button>
    </div>
  </div>
</div>
<script src="js/jquery-1.12.4.js"></script>
<script>
 //生成随机颜色
  var randomColor=function(){
    var r= Math.floor(Math.random()*257);
    var g= Math.floor(Math.random()*257);
    var b= Math.floor(Math.random()*257);
    return "rgb("+r+","+g+","+b+")";
  }
  //定义数组保存弹幕
  var saveDan=[],index=0,tm;
  //弹幕自动移动方法
  var autoAnimate=function(){
    index++;
    index>saveDan.length-1 && (index=0);
    saveDan[index].appendTo($("#boxDom")).animate({
      "right":$(document).width(),
    },10000,function () {
      $(this).css("right",$(".list-info").width()-$(this).width()).remove();
    });
  }
  //点击创建弹幕
  $("#btn").click(function () {
    var txt=$("#text");
    var randomTop=Math.floor(Math.random()*($("#boxDom video").height()-40));
    if(txt.val().trim().length==0)return;
    var span= $("<span></span>").text(txt.val()).css({
      "color":randomColor(),
      "top":randomTop,
      "right":$(".list-info").width(),
      "z-index":888
    });
    saveDan.unshift(span);//将新的弹幕添加到数组内容的前面
    //添加弹幕列表
    $("<p></p>").text(txt.val()).css("color",randomColor()).prependTo($(".list-info"));
    txt.val("");//清空文本框
    //自动跑起来
    clearInterval(tm);
    index=saveDan.length-1
    tm=setInterval(autoAnimate,1000);
  });
  //enter键确认发送
  $(document).keydown(function (e) {
    var e=e||window.event;
    e.keyCode==13 && ($("#btn").click());
  });
</script>
</body>
</html>

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