jquery实现抽奖功能 - 自学编程网

本文实例为大家分享了jquery实现抽奖功能的具体代码，供大家参考，具体内容如下
<!DOCTYPE html>
<html>
 <head>
 <meta charset="utf-8">
 <title></title>
 <style type="text/css">
 #lottery {
 width: 570px;
 height: 510px;
 margin: 0px auto;
 border: 4px solid #ba1809;
 }
 
 #lottery table {
 background-color: yellow;
 }
 
 #lottery table td {
 position: relative;
 width: 190px;
 height: 170px;
 text-align: center;
 color: #333;
 font-index: -999
 }
 
 #lottery table td img {
 display: block;
 width: 190px;
 height: 170px;
 }
 
 #lottery table td a {
 width: 190px;
 height: 170px;
 display: block;
 text-decoration: none;
 background: url(img/9.jpg) no-repeat top center;
 }
 
 #lottery table td a:hover {
 background-image: url(img/11.jpg);
 }
 
 #lottery table td.active .mask {
 display: block;
 }
 
 .mask {
 width: 100%;
 height: 100%;
 position: absolute;
 left: 0;
 top: 0;
 background-color: rgba(252, 211, 4, 0.5);
 display: none;
 }
 </style>
 
 </head>
 <body>
 
 <div id="lottery">
 <table border="0" cellpadding="0" cellspacing="0">
 <tr>
  <td class="lottery-unit lottery-unit-0">
  <img src="img/1.jpg">
  <div class="mask"></div>
  </td>
  <td class="lottery-unit lottery-unit-1">
  <img src="img/2.jpg">
  <div class="mask"></div>
  </td>
  <td class="lottery-unit lottery-unit-2">
  <img src="img/3.jpg">
  <div class="mask"></div>
  </td>
 </tr>
 <tr>
  <td class="lottery-unit lottery-unit-7">
  <img src="img/4.jpg">
  <div class="mask"></div>
  </td>
  <!-- 点击触发抽奖 -->
  <td><a href="#" rel="external nofollow" ></a></td>
  <td class="lottery-unit lottery-unit-3">
  <img src="img/5.jpg">
  <div class="mask"></div>
  </td>
 </tr>
 <tr>
  <td class="lottery-unit lottery-unit-6">
  <img src="img/6.jpg">
  <div class="mask"></div>
  </td>
  <td class="lottery-unit lottery-unit-5">
  <img src="img/7.jpg">
  <div class="mask"></div>
  </td>
  <td class="lottery-unit lottery-unit-4">
  <img src="img/8.jpg">
  <div class="mask"></div>
  </td>
 </tr>
 </table>
 </div>
 
 <script src="js/jquery.js"></script>
 <script type="text/javascript">
 var lot = $(".lottery-unit");
 var nowIndex = -1; //记录添加激活类的下标
 var btn = $("table").find("a")
 console.log(btn)
 var curIndex = null; //记录上一次坐标
 var round = 0; //记录移动几圈
 var n = 0; //记录移动了多少次
 var timer = null; //旋转计时器
 var priceIndex = (Math.random()*lot.length) | 0; //中奖的下标
 console.log(priceIndex)
 var isClick = true;
 function move(){
 n++;
 nowIndex++;
 if(n%8==0){
 round++;
 console.log("跑了"+round+"圈");
 if(round>=3){
  clearInterval(timer);
  timer = setInterval(move,50)
 }
 if(round > 8){
  clearInterval(timer);
  timer = setInterval(move,1000)
 }
 }
 // 第二种方式
 // if(n>=8 && n<12){
 // clearInterval(timer)
 // timer = setInterval(move,50)
 // }
 // if(n>=12){
 // clearInterval(timer)
 // timer = setInterval(move,50)
 // }
 
 lot.filter(".lottery-unit-"+nowIndex).addClass("active")
 // 当curIndex为0时，布尔值为false，所以要加curIndex==0
 if(curIndex || curIndex==0){
 lot.filter(".lottery-unit-"+curIndex).removeClass("active")
 }
 curIndex = nowIndex;
 
 // 如何实现中奖
 if(nowIndex == priceIndex && round > 8){
 
 clearInterval(timer);
 if(priceIndex==1){
  setTimeout(function(){
  alert("111111")
  },1000)
 }
 // 重置参数
 isClick = true;
 round = 0;
 nowIndex = -1;
 curIndex = null;
 priceIndex = (Math.random()*lot.length) | 0;
 console.log("中奖的下标",priceIndex)
 
 }
 if(nowIndex>=lot.length-1){
 nowIndex=-1;
 }
 }
 
 btn.click(function(){
 if(isClick){
 console.log("开始抽奖");
 isClick = false;
 timer = setInterval(move,100);
 }
 })
 </script>
 </body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自学编程网。
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