1. Materials used
2. The code is as follows, focusing on the js part
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>jQuery九宫格大转盘抽奖</title> <style> #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(images/lottery1.jpg) no-repeat top center;} #lottery table td a:hover{background-image:url(images/lottery2.jpg);} #lottery table td.active .mask{display:block;} .mask{ width:100%; height:100%; position:absolute; left:0; top:0; background:url(images/mask.png) no-repeat; display:none; } </style> </head> <body class="keBody"> <!--效果html开始--> <p id="lottery"> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td class="lottery-unit lottery-unit-0"><img src="/static/imghwm/default1.png" data-src="images/gift0.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> <td class="lottery-unit lottery-unit-1"><img src="/static/imghwm/default1.png" data-src="images/gift1.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> <td class="lottery-unit lottery-unit-2"><img src="/static/imghwm/default1.png" data-src="images/gift2.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> </tr> <tr> <td class="lottery-unit lottery-unit-7"><img src="/static/imghwm/default1.png" data-src="images/gift7.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> <td><a href="#"></a></td> <td class="lottery-unit lottery-unit-3"><img src="/static/imghwm/default1.png" data-src="images/gift3.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> </tr> <tr> <td class="lottery-unit lottery-unit-6"><img src="/static/imghwm/default1.png" data-src="images/gift6.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> <td class="lottery-unit lottery-unit-5"><img src="/static/imghwm/default1.png" data-src="images/gift5.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> <td class="lottery-unit lottery-unit-4"><img src="/static/imghwm/default1.png" data-src="images/gift4.jpg" class="lazy" alt="jquery carousel lottery function implementation_jquery" ><p class="mask"></p></td> </tr> </table> </p> <script src="http://code.jquery.com/jquery-latest.js?7.1.34"></script> <script type="text/javascript"> var lottery={ index:-1, //当前转动到哪个位置,起点位置 count:0, //总共有多少个位置 timer:0, //setTimeout的ID,用clearTimeout清除 speed:20, //初始转动速度 times:0, //转动次数 cycle:50, //转动基本次数:即至少需要转动多少次再进入抽奖环节 prize:-1, //中奖位置 init:function(id){ if ($("#"+id).find(".lottery-unit").length>0) { $lottery = $("#"+id); $units = $lottery.find(".lottery-unit"); this.obj = $lottery; this.count = $units.length; $lottery.find(".lottery-unit-"+this.index).addClass("active"); }; }, roll:function(){ var index = this.index; var count = this.count; var lottery = this.obj; $(lottery).find(".lottery-unit-"+index).removeClass("active"); index += 1; if (index>count-1) { index = 0; }; $(lottery).find(".lottery-unit-"+index).addClass("active"); this.index=index; return false; }, stop:function(index){ this.prize=index; return false; } }; function roll(){ lottery.times += 1; lottery.roll();//转动过程调用的是lottery的roll方法,这里是第一次调用初始化 if (lottery.times > lottery.cycle+10 && lottery.prize==lottery.index) { clearTimeout(lottery.timer); lottery.prize=-1; lottery.times=0; click=false; }else{ if (lottery.times<lottery.cycle) { lottery.speed -= 10; }else if(lottery.times==lottery.cycle) { var index = Math.random()*(lottery.count)|0; lottery.prize = index; }else{ if (lottery.times > lottery.cycle+10 && ((lottery.prize==0 && lottery.index==7) || lottery.prize==lottery.index+1)) { lottery.speed += 110; }else{ lottery.speed += 20; } } if (lottery.speed<40) { lottery.speed=40; }; //console.log(lottery.times+'^^^^^^'+lottery.speed+'^^^^^^^'+lottery.prize); lottery.timer = setTimeout(roll,lottery.speed);//循环调用 } return false; } var click=false; window.onload=function(){ lottery.init('lottery'); $("#lottery a").click(function(){ if (click) {//click控制一次抽奖过程中不能重复点击抽奖按钮,后面的点击不响应 return false; }else{ lottery.speed=100; roll(); //转圈过程不响应click事件,会将click置为false click=true; //一次抽奖完成后,设置click为true,可继续抽奖 return false; } }); }; </script> <!--效果html结束--> </body> </html>
The effect is as follows:
3. Notes
.mask starts as follows. It uses rgba, but IE8 is not compatible. Instead, use png image background:url(images/mask.png) no-repeat;
.mask { width: 100%; height: 100%; position: absolute; left: 0; top: 0; background-color: rgba(252,211,4,0.5); display: none }
I hope you can gain something from this article compiled by the editor, and it will be helpful to you in implementing the lottery function.

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