基于javascript实现九宫格大转盘效果

本文实例为大家分享了js实现幸运抽奖九宫格大转盘效果，供大家参考，具体内容如下

实现代码：

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <title>九宫格大转盘</title>
 <style type="text/css">
/*reset*/
*{ padding:0; margin:0}
body{ height: 100%; width: 100%; font-size:12px; color:#333;}
ul{ list-style:none;}
/*demo*/
#lottery{width:400px;height:400px;margin:20px auto 0; position:relative;}
#lottery div{width:100px;height:100px;text-align:centerfont-size:24px;color:#333; float:left;}
#lottery .cent{ background:#C33;}
#lottery .lottery-unit-0{ background:#CC6;}
#lottery .lottery-unit-1{ background:#F99;}
#lottery .lottery-unit-2{ background:#CC6;}
#lottery .lottery-unit-3{ background:#F99;}
#lottery .lottery-unit-4{ background:#CC6;}
#lottery .lottery-unit-5{ background:#F99;}
#lottery .lottery-unit-6{ background:#CC6;}
#lottery .lottery-unit-7{ background:#F99;}
#lottery .lottery-unit-8{ background:#CC6;}
#lottery .lottery-unit-9{ background:#F99;}
#lottery .lottery-unit-10{ background:#CC6;}
#lottery .lottery-unit-11{ background:#F99;}

#lottery div.select{background:#F0F;}

#lottery .start{ position:absolute; left:100px; top:100px; height:200px; width:200px;background:#C33; font-size:30px; text-align:center; cursor:pointer; line-height:200px; color:#fff;}
</style>
</style>
</head>
<body>
 <!--九宫格大转盘-->
 <div id="lottery">

  <div class="lottery-unit lottery-unit-0">1</div>
  <div class="lottery-unit lottery-unit-1">2</div>
  <div class="lottery-unit lottery-unit-2">3</div>
  <div class="lottery-unit lottery-unit-3">4</div>

  <div class="lottery-unit lottery-unit-11">12</div>
  <div class="cent"></div>
  <div class="cent"></div>
  <div class="lottery-unit lottery-unit-4">5</div>

  <div class="lottery-unit lottery-unit-10">11</div>
  <div class="cent"></div>
  <div class="cent"></div>
  <div class="lottery-unit lottery-unit-5">6</div>

  <div class="lottery-unit lottery-unit-9">10</div>
  <div class="lottery-unit lottery-unit-8">9</div>
  <div class="lottery-unit lottery-unit-7">8</div>
  <div class="lottery-unit lottery-unit-6">7</div>

  <div class="start" id="start">抽奖</div>
 </div>
</body>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
 //九宫格大转盘
 var count=3;//可用次数
 var i=null;//初始位置，
 var speed=80;//转动速度
 var ok=null;//产生0-11的整数，标记中奖位置
 var count=null;//总变化次数
 var nowcount=null;//当前的变化位置
 var n=5;//圈数
 var paly=false;
 var xq=0;
 function dong(){//利用递归模拟setinterval的实现
 if(nowcount>count){
 setTimeout(function(){
 paly=false;
 alert("恭喜你，中了"+eval(ok)+"等奖");
 },500);
 }else{
 nowcount+=1;
 if(i>10){
 xq+=1;
 if(xq==n-1){
  speed=300;
 };
 $(".lottery-unit").removeClass("select");
 $(".lottery-unit-11").addClass("select");
 i=0;
 }else{
 $(".lottery-unit").removeClass("select");
 $(".lottery-unit-"+i).addClass("select");
 i+=1;
 };
 setTimeout(dong,speed);
 }; 

 };
 $(".start").click(function(){
 if(!paly){
 if(count==0){
 alert("已经没有机会，下次再来！");
 }else{
 ok=Math.floor((Math.random()*12));//产生0-11的整数，标记中奖位置
 count=n*12+ok;//总变化次数
 nowcount=0;//当前的变化位置
 i=0;//初始位置，
 paly=true;
 count-=1;
 dong();
 };

 }else{

 };

 });
});
</script>
</html>

以上就是本文的全部内容，希望对大家学习javascript程序设计有所帮助。