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【微信公众平台开发】微信幸运大转盘

2024-07-18 19:47:27   231人阅读


需要js插件（下载包地址：http://download.csdn.net/detail/wyz365889/7798255）：
jquery
jQueryRotate.2.2.js
jquery.easing.min.js



前端显示代码：
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<meta name="viewport" content="width=device-width,height=device-height,inital-scale=1.0,maximum-scale=1.0,user-scalable=no;">
	<meta name="apple-mobile-web-app-capable" content="yes">
	<meta name="apple-mobile-web-app-status-bar-style" content="black">
	<meta name="format-detection" content="telephone=no">
	<meta name="description" content="微信">
	<meta http-equiv="Pragma" content="no-cache">    
	<meta http-equiv="Cache-Control" content="no-cache">
	<meta http-equiv="Expires" content="0">
	<title>幸运大转盘</title>
	<style type="text/css">
		body,div,img {margin:0; padding:0; border:0 none;}
		#bg {background:url(img/bodybg.jpg) repeat scroll;}
		
		#outer {position:relative; width:100%; top:20px; margin-bottom:30px;}
		#disk {margin:0 auto; width:300px;height:300px; max-width:300px;}
		#disk img{ margin:0 auto;display:block; max-width:100%; }
		
		#inner {position:absolute; width:100%; top:107px;}
		#start {margin:0 auto; width:100px; height:104px; max-width:106px;}
		#start img {display:block; margin:0 auto; max-width:100%; }
		
		#set {background-color: #FEF8B2; border-radius: 5px; padding: 2px;}
	</style>
	
	<script type="text/javascript" src=http://www.mamicode.com/"JQM/jquery.js"></script>>


后台处理概率代码：
<?php
	$prizeinfo_arr = array(
		0 => array('id'=>1, 'min'=>array(347), 'max'=>array(13), 'prizename'=>'一等奖', 'gl'=>1),
		1 => array('id'=>2, 'min'=>array(107,227), 'max'=>array(133,253), 'prizename'=>'二等奖', 'gl'=>2),
		2 => array('id'=>3, 'min'=>array(47,167,287), 'max'=>array(73,193,313), 'prizename'=>'三等奖', 'gl'=>3),
		
		3 => array('id'=>4, 'min'=>array(17,77,137,197,257,317), 'max'=>array(43,103,163,223,283,343), 'prizename'=>'未中奖', 'gl'=>4),
	);
	
	foreach ($prizeinfo_arr as $key=>$val)
	{
		$glarr[$val['id']] = $val['gl'];
	}
	
	function getRand($glarr)
	{
		$glsum = array_sum($glarr);
		
		foreach ($glarr as $key=>$nowgl)
		{
			$randNum = mt_rand(1, $glsum);
			if($randNum <= $nowgl)
			{
				$getid = $key;
				unset($glarr);
				return $getid;
			}
			else 
			{
				$glsum -= $nowgl;
			}
		}
	}
	
	$glid = getRand($glarr); //获取中奖随机概率的id
	$res = $prizeinfo_arr[$glid-1];
	$min = $res['min'];
	$max = $res['max'];
	
	if($res['id'] == 4)
	{
		$i = mt_rand(0, 5);
		$prizeinfo['angle'] = mt_rand($min[$i], $max[$i]);
	}
	if($res['id'] == 1)
	{
		$prizeinfo['angle'] = mt_rand($min, $max);
	}
	else 
	{
		$i = mt_rand(0, 1);
		$prizeinfo['angle'] = mt_rand($min[$i], $max[$i]);
	}
	
	$prizeinfo['prizename'] = $res['prizename'];
	
	echo json_encode($prizeinfo);
?>

效果图：


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