NSDate*datenow = [NSDatedate];//现在时间,你可以输出来看下是什么格式

//时间转时间戳的方法:

NSString*timeSp = [NSStringstringWithFormat:@"%ld", (long)[datenowtimeIntervalSince1970]];

NSLog(@"timeSp:%ld",(long)[timeSpintegerValue] );//时间戳的值

NSMutableDictionary*dic = [NSMutableDictionarydictionaryWithCapacity:10];

dic[@"appid"] =@"你的APPID";//可以写死，也可以写成 从服务器获取的appid,

dic[@"partnerid"] = responseObject[@"result"][@"mch_id"];//商户ID

dic[@"prepayid"] = responseObject[@"result"][@"prepay_id"];

dic[@"noncestr"] = responseObject[@"result"][@"nonce_str"];

dic[@"timestamp"] = [NSStringstringWithFormat:@"%ld",(long)[timeSpintValue]];

dic[@"package"] =@"Sign=WXPay";

BZLog(@"=====%@",dic);

NSMutableString*contentString=[NSMutable Stringstring];

NSArray*keys = [dicallKeys];

//按字母顺序排序

NSArray*sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(idobj1,idobj2) {

return[obj1 compare:obj2 options:NSNumericSearch];

}];

BZLog(@"+++++%@",sortedArray);

//拼接字符串

for(NSString*categoryIdinsortedArray) {

if(![[dic objectForKey:categoryId] isEqualToString:@""]

&& ![[dic objectForKey:categoryId] isEqualToString:@"sign"]

&& ![[dic objectForKey:categoryId] isEqualToString:@"key"]

)

{

[contentString appendFormat:@"%@=%@&", categoryId, [dicobjectForKey:categoryId]];

}

}

//添加商户密钥key字段API密钥

[contentStringappendFormat:@"key=%@",@"575fe81f69ad0dc054c35f478de8d70e"];

BZLog(@"contentString%@",contentString);

NSString*md5SignStr = [BZNetworkingManage MD5StrWithSignStr:contentString];//md5加密

//调起微信支付

PayReq*req= [[PayReqalloc]init];

req.partnerId= dic[@"partnerid"];//商户ID

req.prepayId= dic[@"prepayid"];

req.nonceStr= dic[@"noncestr"];

UInt32timeStamp =[dic[@"timestamp"]intValue];

req.timeStamp= timeStamp;

req.package=@"Sign=WXPay";

req.sign= md5SignStr;

[WXApisendReq:req];