jQuery实现简易数字摇奖程序

来源：互联网发布：专业美工编辑：程序博客网时间：2024/04/29 17:29

实现思路：首先用random生成一个四位的随机数，转换为字符串并分割返回成数组。利用each()遍历每一个.num的元素，设置其backgroundPositionY来实现滚动的效果。

使用到jQuery Easing plugin:http://gsgd.co.uk/sandbox/jquery/easing/

相关代码

HTML

<head><script type="text/javascript" src="js/jquery-1.11.0.js"></script><script type="text/javascript" src="js/easing.js"></script></head><div class="res"></div><div class="num_box"><div class="num"></div><div class="num"></div><div class="num"></div><div class="num"></div><div class="btn">开始摇奖</div></div>

CSS

html,body{margin: 0;padding: 0;overflow: hidden;}body{ background: #eee;}.res{text-align: center;margin-top: 100px;}.num_box{height:450px; width:750px;position:absolute;left:50%;top:140px;margin-left:-370px;z-index:8;overflow:hidden;text-align:center;}.num_box .num{background:url(images/num.png) top center repeat-y #ccc;width:181px;height:265px;float:left;margin-right:6px;}.num_box .btn{background-color:#89ec6a;width:264px;height:68;position:absolute;left:50%;top:300px;margin-left:-132px;cursor:pointer;clear:both; line-height: 60px;border-radius: 10px;}

/*获得随机数*/function getRanNum(){ var x=9999; //最大上限var y=1111;//下限var ranNum = parseInt(Math.random()*(x-y)+y);return ranNum;}var isBegin=false; //用于判断是否正在执行$(function(){var imgH=265; //每张数字图片高度$('.btn').click(function(){if(isBegin){return false;} //正在执行摇奖时，防止再次点击按键执行isBegin=true;var ranNum=getRanNum(); $('.res').html('摇奖结果：'+ranNum);$('.num').css('backgroundPositionY',0);var numArr=(ranNum+'').split(''); //获取随机数转换为字符串并分割返回为数组$('.num').each(function(index){var ele=$(this); //当前元素jquery对象setTimeout(function(){ //延迟执行ele.animate({'backgroundPositionY':(imgH*50)-(imgH*numArr[index]) },{duration: 6000+index*3000,easing: "easeInOutCirc",complete: function(){if(index==3) isBegin = false;} });},300*index);});//end each()});});

效果：

源代码：

http://download.csdn.net/detail/monarch_lin/7096489

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