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本文執行個體為大家分享了js實現幸運抽獎九宮格大轉盤效果，供大家參考，具體內容如下
實現代碼：
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>九宮格大轉盤</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> <!--九宮格大轉盤--> <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">抽獎</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(){ //九宮格大轉盤 var count=3;//可用次數 var i=null;//初始位置， var speed=80;//轉動速度 var ok=null;//產生0-11的整數，標記中獎位置 var count=null;//總變化次數 var nowcount=null;//當前的變化位置 var n=5;//圈數 var paly=false; var xq=0; function dong(){//利用遞迴類比setinterval的實現 if(nowcount>count){ setTimeout(function(){ paly=false; alert("恭喜你，中了"+eval(ok)+"等獎"); },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("已經沒有機會，下次再來！"); }else{ ok=Math.floor((Math.random()*12));//產生0-11的整數，標記中獎位置 count=n*12+ok;//總變化次數 nowcount=0;//當前的變化位置 i=0;//初始位置， paly=true; count-=1; dong(); }; }else{ }; }); });</script></html>
以上就是本文的全部內容，希望對大家學習javascript程式設計有所協助。
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