jquery实现九宫格大转盘抽奖

前端技术 2023/09/01 JavaScript

下面我们来分享一个九宫格抽奖特效

特效说明：

一款jQuery九宫格大转盘抽奖代码网页特效，点击抽奖按钮开始随机抽奖选择奖品，可设置起点位置、奖品数量、转动次数、中奖位置参数。（兼容测试：IE7及以上、Firefox、Chrome、Opera、Safari、360等主流浏览器）

HTML:

<!--效果html开始-->
<div id=\"lottery\">
	<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">
		<tr>
			<td class=\"lottery-unit lottery-unit-0\"><img src=\"images/1.png\"></td>
			<td class=\"lottery-unit lottery-unit-1\"><img src=\"images/2.png\"></td>
			<td class=\"lottery-unit lottery-unit-2\"><img src=\"images/4.png\"></td>
   <td class=\"lottery-unit lottery-unit-3\"><img src=\"images/3.png\"></td>
		</tr>
		<tr>
			<td class=\"lottery-unit lottery-unit-11\"><img src=\"images/7.png\"></td>
			<td colspan=\"2\" rowspan=\"2\"><a href=\"#\"></a></td>
			<td class=\"lottery-unit lottery-unit-4\"><img src=\"images/5.png\"></td>
		</tr>
		<tr>
			<td class=\"lottery-unit lottery-unit-10\"><img src=\"images/1.png\"></td>
			<td class=\"lottery-unit lottery-unit-5\"><img src=\"images/6.png\"></td>
		</tr>
  <tr>
			<td class=\"lottery-unit lottery-unit-9\"><img src=\"images/3.png\"></td>
			<td class=\"lottery-unit lottery-unit-8\"><img src=\"images/6.png\"></td>
			<td class=\"lottery-unit lottery-unit-7\"><img src=\"images/8.png\"></td>
   <td class=\"lottery-unit lottery-unit-6\"><img src=\"images/7.png\"></td>
		</tr>
	</table>
</div>

js部分

<script type=\"text/javascript\" src=\"jquery-1.8.3.min.js\"></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();
	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);
	}
	return false;
}

var click=false;

window.onload=function(){
	lottery.init(\'lottery\');
	$(\"#lottery a\").click(function(){
		if (click) {
			return false;
		}else{
			lottery.speed=100;
			roll();
			click=true;
			return false;
		}
	});
};
</script>

CSS部分

/* 效果CSS开始 */
#lottery{width:574px;height:584px;margin:0px auto;background:url(../images/bg.jpg) no-repeat;padding:50px 55px;}
#lottery table td{width:142px;height:142px;text-align:center;vertical-align:middle;font-size:24px;color:#333;font-index:-999}
#lottery table td a{width:284px;height:284px;line-height:150px;display:block;text-decoration:none;}
#lottery table td.active{background-color:#ea0000;}
/* 效果CSS结束 */

JS中可设置参数： 

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

最后奉上演示图

本文地址：https://www.stayed.cn/item/2568

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