转盘抽奖hTML CSS jquery jquery转盘抽奖功能实现

一、用到的素材

二、代码如下，重点是js部分

jQuery九宫格大转盘抽奖

#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;

}

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.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.οnlοad=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;

}

});

};

效果如下：

三、注意事项

.mask开始如下，用的是rgba，但是IE8不兼容，改为使用png图片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

}

希望大家可以从小编整理的这篇文章中有所收获，对大家实现抽奖功能有所帮助。