<code class="hljs objectivec">//
// WechatPayManager.m
//
// Created by HuangCharlie on 5/24/15.
//
//
#import "WechatPayManager.h"
@implementation WechatPayManager
//初始化函数
-(id)initWithAppID:(NSString*)appID mchID:(NSString*)mchID spKey:(NSString*)key
{
self = [super init];
if(self)
{
//初始化私有参数，主要是一些和商户有关的参数
if (self.debugInfo == nil){
self.debugInfo = [NSMutableString string];
}
[self.debugInfo setString:@""];
self.appId = appID;//微信分配给商户的appID
self.mchId = mchID;//
self.spKey = key;//商户的密钥
}
return self;
}
//获取debug信息
-(NSString*) getDebugInfo
{
NSString *res = [NSString stringWithString:self.debugInfo];
[self.debugInfo setString:@""];
return res;
}
//创建package签名
-(NSString*) createMd5Sign:(NSMutableDictionary*)dict
{
NSMutableString *contentString =[NSMutableString string];
NSArray *keys = [dict allKeys];
//按字母顺序排序
NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
return [obj1 compare:obj2 options:NSNumericSearch];
}];
//拼接字符串
for (NSString *categoryId in sortedArray) {
if ( ![[dict objectForKey:categoryId] isEqualToString:@""]
&& ![categoryId isEqualToString:@"sign"]
&& ![categoryId isEqualToString:@"key"]
)
{
[contentString appendFormat:@"%@=%@&", categoryId, [dict objectForKey:categoryId]];
}
}
//添加key字段
[contentString appendFormat:@"key=%@", self.spKey];
//得到MD5 sign签名
NSString *md5Sign =[WXUtil md5:contentString];
//输出Debug Info
[self.debugInfo appendFormat:@"MD5签名字符串：\n%@\n\n",contentString];
return md5Sign;
}
//获取package带参数的签名包
-(NSString *)genPackage:(NSMutableDictionary*)packageParams
{
NSString *sign;
NSMutableString *reqPars=[NSMutableString string];
//生成签名
sign = [self createMd5Sign:packageParams];
//生成xml的package
NSArray *keys = [packageParams allKeys];
[reqPars appendString:@"<xml>\n"];
for (NSString *categoryId in keys) {
[reqPars appendFormat:@"<%@>%@<!--%@-->\n", categoryId, [packageParams objectForKey:categoryId],categoryId];
}
[reqPars appendFormat:@"<sign>%@</sign>\n</xml>", sign];
return [NSString stringWithString:reqPars];
}
//提交预支付
-(NSString *)sendPrepay:(NSMutableDictionary *)prePayParams
{
NSString *prepayid = nil;
//获取提交支付
NSString *send = [self genPackage:prePayParams];
//输出Debug Info
[self.debugInfo appendFormat:@"API链接:%@\n", self.payUrl];
[self.debugInfo appendFormat:@"发送的xml:%@\n", send];
//发送请求post xml数据
NSData *res = [WXUtil httpSend:self.payUrl method:@"POST" data:send];
//输出Debug Info
[self.debugInfo appendFormat:@"服务器返回：\n%@\n\n",[[NSString alloc] initWithData:res encoding:NSUTF8StringEncoding]];
XMLHelper *xml = [[XMLHelper alloc] autorelease];
//开始解析
[xml startParse:res];
NSMutableDictionary *resParams = [xml getDict];
//判断返回
NSString *return_code = [resParams objectForKey:@"return_code"];
NSString *result_code = [resParams objectForKey:@"result_code"];
if ( [return_code isEqualToString:@"SUCCESS"] )
{
//生成返回数据的签名
NSString *sign = [self createMd5Sign:resParams ];
NSString *send_sign =[resParams objectForKey:@"sign"] ;
//验证签名正确性
if( [sign isEqualToString:send_sign]){
if( [result_code isEqualToString:@"SUCCESS"]) {
//验证业务处理状态
prepayid = [resParams objectForKey:@"prepay_id"];
return_code = 0;
[self.debugInfo appendFormat:@"获取预支付交易标示成功！\n"];
}
}else{
self.lastErrCode = 1;
[self.debugInfo appendFormat:@"gen_sign=%@\n _sign=%@\n",sign,send_sign];
[self.debugInfo appendFormat:@"服务器返回签名验证错误！！！\n"];
}
}else{
self.lastErrCode = 2;
[self.debugInfo appendFormat:@"接口返回错误！！！\n"];
}
return prepayid;
}
- (NSMutableDictionary*)getPrepayWithOrderName:(NSString*)name
price:(NSString*)price
device:(NSString*)device
{
//订单标题，展示给用户
NSString* orderName = name;
//订单金额,单位（分）
NSString* orderPrice = price;//以分为单位的整数
//支付设备号或门店号
NSString* orderDevice = device;
//支付类型，固定为APP
NSString* orderType = @"APP";
//发器支付的机器ip,暂时没有发现其作用
NSString* orderIP = @"196.168.1.1";
//随机数串
srand( (unsigned)time(0) );
NSString *noncestr = [NSString stringWithFormat:@"%d", rand()];
NSString *orderNO = [NSString stringWithFormat:@"%ld",time(0)];
//================================
//预付单参数订单设置
//================================
NSMutableDictionary *packageParams = [NSMutableDictionary dictionary];
[packageParams setObject: self.appId forKey:@"appid"]; //开放平台appid
[packageParams setObject: self.mchId forKey:@"mch_id"]; //商户号
[packageParams setObject: orderDevice forKey:@"device_info"]; //支付设备号或门店号
[packageParams setObject: noncestr forKey:@"nonce_str"]; //随机串
[packageParams setObject: orderType forKey:@"trade_type"]; //支付类型，固定为APP
[packageParams setObject: orderName forKey:@"body"]; //订单描述，展示给用户
[packageParams setObject: NOTIFY_URL forKey:@"notify_url"]; //支付结果异步通知
[packageParams setObject: orderNO forKey:@"out_trade_no"];//商户订单号
[packageParams setObject: orderIP forKey:@"spbill_create_ip"];//发器支付的机器ip
[packageParams setObject: orderPrice forKey:@"total_fee"]; //订单金额，单位为分
//获取prepayId（预支付交易会话标识）
NSString *prePayid;
prePayid = [self sendPrepay:packageParams];
if(prePayid == nil)
{
[self.debugInfo appendFormat:@"获取prepayid失败！\n"];
return nil;
}
//获取到prepayid后进行第二次签名
NSString *package, *time_stamp, *nonce_str;
//设置支付参数
time_t now;
time(&now);
time_stamp = [NSString stringWithFormat:@"%ld", now];
nonce_str = [WXUtil md5:time_stamp];
//重新按提交格式组包，微信客户端暂只支持package=Sign=WXPay格式，须考虑升级后支持携带package具体参数的情况
//package = [NSString stringWithFormat:@"Sign=%@",package];
package = @"Sign=WXPay";
//第二次签名参数列表
NSMutableDictionary *signParams = [NSMutableDictionary dictionary];
[signParams setObject: self.appId forKey:@"appid"];
[signParams setObject: self.mchId forKey:@"partnerid"];
[signParams setObject: nonce_str forKey:@"noncestr"];
[signParams setObject: package forKey:@"package"];
[signParams setObject: time_stamp forKey:@"timestamp"];
[signParams setObject: prePayid forKey:@"prepayid"];
//生成签名
NSString *sign = [self createMd5Sign:signParams];
//添加签名
[signParams setObject: sign forKey:@"sign"];
[self.debugInfo appendFormat:@"第二步签名成功，sign＝%@\n",sign];
//返回参数列表
return signParams;
}
@end</code>
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