前言：前端：jq+h5 实现九宫格动效 后端：thinkphp3.2.3 实现中奖概率算法 功能：支持读取数据库预设的中奖率及奖品池，中奖率可以自定义，必须是整数 最终效果如下： 
代码： choujiang.html代码如下： <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="author" content="武当山道士" /><title>九宫格抽奖转盘</title><style type="text/css">.container{width:100%;height:auto;line-height: 100%;text-align: center;}#lottery{width:425px;height:425px;margin:auto;background:#e5e5e5;}#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:#fff333;border-radius: 10px;}#start {color:white;background:orange; border-radius: 10px; height:130px; line-height: 130px; width:130px; margin: auto; /*margin: 10% 10% 10% 10%;*/ text-align: center; display: block; text-decoration: none;}#con_prize{display: none;margin-top: 10px;}#pname{color:red;margin-left: 5px;margin-right: 10px;font-size: 20px;}.prize{background:#000 ;opacity: 0.5; height:130px;width: 130px; border-radius: 5px;margin: auto;line-height: 130px; text-shadow: 1px 1px 2px;}.on{opacity: 1;color:#fff;background: #a5a5d1}</style></head><body><div class="container"> <div id="lottery"> <table border="0" cellpadding="0" cellspacing="0" style="background:#e3f4a1"> <tr> <td class="lottery-unit lottery-unit-0"><div class="prize prize-0">安慰奖</div></td> <td class="lottery-unit lottery-unit-1"><div class="prize prize-1">玩具车</div></td> <td class="lottery-unit lottery-unit-2"><div class="prize prize-2">自行车</div></td> </tr> <tr> <td class="lottery-unit lottery-unit-7"><div class="prize prize-7">奥迪</div></td> <td ><a href="#" rel="external nofollow" class = "lottery-unit" id="start">开始抽奖</a></td> <td class="lottery-unit lottery-unit-3"><div class="prize prize-3">电动车</div></td> </tr> <tr> <td class="lottery-unit lottery-unit-6"><div class="prize prize-6">夏利</div></td> <td class="lottery-unit lottery-unit-5"><div class="prize prize-5">拖拉机</div></td> <td class="lottery-unit lottery-unit-4"><div class="prize prize-4">摩托</div></td> </tr> </table> </div> <div id="con_prize" data-pname="长宜太盛100元优惠券" data-pid="1">恭喜您获得奖品：<span id="pname"></span><button onclick="getPrize()">领取奖品</button></div></div><script type="text/javascript" src="jquery-1.11.1.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:8, //总共有多少个奖品位置，9宫格就是8个奖品位置 timer:0, //setTimeout的ID，用clearTimeout清除 speed:10, //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:0, //默认中奖位置，放默认奖品 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(".prize-"+this.index).addClass("on"); }; }, roll:function(){ var index = this.index; var count = this.count; var lottery = this.obj; $(lottery).find(".prize-"+index).removeClass("on"); index += 1; if (index>count-1) { index = 0; }; $(lottery).find(".prize-"+index).addClass("on"); this.index=index; return false; }, stop:function(index){ this.prize=index; return false; } }; //存储奖品信息 var prize_data = { pname:'默认奖品', //奖品名称 pnum:0, //中奖位置 默认0，重要，转盘据此来定位获奖商品 pid:1, //奖品id 默认1 }; function roll(){ lottery.times += 1; lottery.roll(); if (lottery.times > lottery.cycle+10 && lottery.prize==lottery.index) { clearTimeout(lottery.timer); lottery.times=0; click=false; //显示中奖信息 showDetail(); }else{ //速度控制 if (lottery.times<lottery.cycle) { lottery.speed -= 10; }else if(lottery.times==lottery.cycle) { index = lottery.prize; }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; }; //延时递归调用 lottery.timer = setTimeout(roll,lottery.speed); } return false; } /* * 获取中奖位置 * @param {string} name 用户昵称（必须） * @param {string} avatar 微信头像网址（必须） * @param {string} openid 微信openid（必须，用于验证唯一性，一个用户只能抽奖一次） * @return {bool} */ function doRoll(url,name,avatar,openid){ $.ajax({ url: url, data:{name:name,avatar:avatar,openid:openid}, async:false,dataType:'json',success: function(rst){ lottery.speed=100; var data = rst.data; lottery.prize = data.pnum; prize_data = { pname:data.pname, pnum:data.pnum, pid:data.pid }; roll(); click=true; return false; }}); } //领奖(跳转收货地址页面，或者弹出收货地址页面) function getPrize(){ alert("请填写收货地址"); } //清空中奖信息 function clearDetail(){ $("#con_prize").hide(); $("#pname").html(""); } //显示中奖信息 function showDetail(){ $("#con_prize").show(); $("#pname").html(prize_data.pname); } var click=false; window.function(){ var url = 'http://test.com/api/Shop/ex/';//这里改成实际后台抽奖接口 lottery.init('lottery'); $("#start").click(function(){ if (click) { return false; }else{ clearDetail(); doRoll(url,"name","avatar","openid"); } }); };</script></body></html>thinkphp接口代码如下： namespace Api/Controller;use Think/Controller;class ShopController Extends Controller{ /** * 抽奖后台接口 * @author 武当山道士 */ public function ex(){ $nick = I('nick','','trim'); $avatar = I('avatar','','trim'); $openid = I('openid','','trim'); //if(empty($nick)) $this->error('empty nick'); //if(empty($avatar)) $this->error('empty avatar'); //if(empty($openid)) $this->error('empty openid'); /*自己封装的error函数，正常应该这样写： $this->ajaxReturn(array( 'data'=>'', 'info'=>$info, 'status'=>$status ));*/ //初始化奖品池，8个奖品，满概率100，最小概率为1(id,name以实际数据库取出的数据为准，percent之和等于100) $arr8 = array( array("id"=>1,"name"=>"安慰奖","percent"=>69), array("id"=>2,"name"=>"玩具车","percent"=>10), array("id"=>3,"name"=>"自行车","percent"=>6), array("id"=>4,"name"=>"电动车","percent"=>5), array("id"=>5,"name"=>"摩托","percent"=>4), array("id"=>6,"name"=>"拖拉机","percent"=>3), array("id"=>7,"name"=>"夏利","percent"=>2), array("id"=>8,"name"=>"奥迪","percent"=>1), ); //下标存储数组100个下表，0-7 按概率分配对应的数量 $indexArr = array(); for($i=0;$i<sizeof($arr8);$i++){ for($j=0;$j<$arr8[$i]['percent'];$j++){ //index 追加到数组indexArr array_push($indexArr, $i); } } //数组乱序 shuffle($indexArr); //从下标数组中随机取一个下标作为中奖下标，$rand_index 是$indexArr的随机元素的下标（0-99） $rand_index = array_rand($indexArr,1); //获取中奖信息 $prize_index = $indexArr[$rand_index]; $prizeInfo = $arr8[$prize_index]; $data['pnum'] = $prize_index;//对应前端奖品编号 $data['pid'] = $prizeInfo['id']; $data['pname'] = $prizeInfo['name']; $this->success($data);/*自己封装的success，正常应该这样写 $this->ajaxReturn(array( 'data'=>$data, 'info'=>'成功', 'status'=>1 ));*/ } }以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持wanshiok.com。
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