jquery——九宮格大轉(zhuǎn)盤抽獎實例
更新時間:2017年01月16日 10:09:42 作者:starof
本篇文章主要介紹了jquery——九宮格大轉(zhuǎn)盤抽獎實例,小編覺得挺不錯的,現(xiàn)在分享給大家,也給大家做個參考。一起跟隨小編過來看看吧
一、用到的圖片









二、代碼如下,重點是js部分
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery九宮格大轉(zhuǎn)盤抽獎</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開始-->
<div id="lottery">
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td class="lottery-unit lottery-unit-0"><img src="images/gift0.jpg"><div class="mask"></div></td>
<td class="lottery-unit lottery-unit-1"><img src="images/gift1.jpg"><div class="mask"></div></td>
<td class="lottery-unit lottery-unit-2"><img src="images/gift2.jpg"><div class="mask"></div></td>
</tr>
<tr>
<td class="lottery-unit lottery-unit-7"><img src="images/gift7.jpg"><div class="mask"></div></td>
<td><a href="#"></a></td>
<td class="lottery-unit lottery-unit-3"><img src="images/gift3.jpg"><div class="mask"></div></td>
</tr>
<tr>
<td class="lottery-unit lottery-unit-6"><img src="images/gift6.jpg"><div class="mask"></div></td>
<td class="lottery-unit lottery-unit-5"><img src="images/gift5.jpg"><div class="mask"></div></td>
<td class="lottery-unit lottery-unit-4"><img src="images/gift4.jpg"><div class="mask"></div></td>
</tr>
</table>
</div>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
var lottery={
index:-1, //當(dāng)前轉(zhuǎn)動到哪個位置,起點位置
count:0, //總共有多少個位置
timer:0, //setTimeout的ID,用clearTimeout清除
speed:20, //初始轉(zhuǎn)動速度
times:0, //轉(zhuǎn)動次數(shù)
cycle:50, //轉(zhuǎn)動基本次數(shù):即至少需要轉(zhuǎn)動多少次再進入抽獎環(huán)節(jié)
prize:-1, //中獎位置
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();//轉(zhuǎn)動過程調(diào)用的是lottery的roll方法,這里是第一次調(diào)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);//循環(huán)調(diào)用
}
return false;
}
var click=false;
window.onload=function(){
lottery.init('lottery');
$("#lottery a").click(function(){
if (click) {//click控制一次抽獎過程中不能重復(fù)點擊抽獎按鈕,后面的點擊不響應(yīng)
return false;
}else{
lottery.speed=100;
roll(); //轉(zhuǎn)圈過程不響應(yīng)click事件,會將click置為false
click=true; //一次抽獎完成后,設(shè)置click為true,可繼續(xù)抽獎
return false;
}
});
};
</script>
<!--效果html結(jié)束-->
</body>
</html>
效果如下:

三、注意事項
1、抽獎過程說明
上面只是前端展示的效果。中獎物品通過一個隨機數(shù)生成。
var index = Math.random()*(lottery.count)|0;
真正開發(fā)中中獎物品是通過向后端接口發(fā)送請求返回的。
$("#lottery a").click(function(){
var islogin=checkLogin();
if(islogin){//已登錄用戶才能去抽獎
if (click) {
return false;
}else{
//向后端接口發(fā)請求返回中獎結(jié)果
var geturl="http://xxxxxx?username="+username+"&token="+token;
$.ajax({
url:geturl,
type:"GET",
dataType:"json",
async:false,
success:function(data){
if(data.errorcode==0){
var rewardid=data["message"]["rewardid"];
var cardno=data["message"]["rewardCardNo"];
var passno=data["message"]["rewardCardPass"];
var prize=-1;
var content="";
if(rewardid=="iphone6"){
lottery.prize=0;
prize=0;
content="一部iphone6手機";
$("#content1").html(content);
}else if(rewardid=="PPTVKING"){
lottery.prize=1;
prize=1;
content="一部PPTV KING7s 3D影音手機";
$("#content1").html(content);
/*... */
}else if(rewardid=="legao"){
lottery.prize=5;
prize=5;
content="一份樂高的玩具";
$("#content1").html(content);
}
lottery.speed=100;
roll();
click=true;
return false;
}else{
/*錯誤處理*/
if(data.errorcode==3){
$("#novip").show();
}else{
$("#notime").show();
}
}
}/*function結(jié)束*/
});/*ajax結(jié)束*/
}/*else結(jié)束*/
}
});
2、兼容性說明
.mask開始如下,用的是rgba,但是IE8不兼容,改為使用png圖片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
}
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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