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w3xue。