jquery实现抽奖功能

时间：2021-05-26

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>

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