Work With Payu Money In Ios/Iphone

=> Here Used One the Example Of the Payu Money Concept:-

    int i = arc4random() % 9999999999;
    NSString *strHash = [self createSHA512:[NSString

    stringWithFormat:@"%d%@",i,[NSDate date]]];

 // Generatehash512(rnd.ToString() + DateTime.Now);
    NSString *txnid1 = [strHash substringToIndex:20];
    NSLog(@"tnx1 id %@",txnid1);
    NSString *key = @"JBZaLc";
    NSString *amount = @"1000";
    NSString *productInfo = @"Nice product";
    NSString *firstname = @"Mani";
    NSString *email = @"mani.ingenius@gmail.com";
    NSString *phone = @"1234566";
    NSString *surl = @"www.google.com";
    NSString *furl = @"www.google.com";
    NSString *serviceprovider = @"payu_paisa";
    NSString *hashValue = [NSString stringWithFormat:

    @"%@|%@|%@|%@|%@|%@|||||||||||GQs7yium",key,txnid1,amount,

    productInfo,firstname,email];
    NSString *hash = [self createSHA512:hashValue];
    NSDictionary *parameters = [NSDictionary

    dictionaryWithObjects:[NSArray arrayWithObjects:txnid1,key,
    amount,productInfo,firstname,email,phone,surl,furl,hash,serviceprovider
    ,nil] forKeys:[NSArray arrayWithObjects:@"txnid",@"key",@"amount",

    @"productinfo",@"firstname",@"email",@"phone",@"surl",@"furl",@"hash",

    @"service_provider", nil]];
    __block NSString *post = @"";
    [parameters enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        if ([post isEqualToString:@""]) {
            post = [NSString stringWithFormat:@"%@=%@",key,obj];
        }else{
            post = [NSString stringWithFormat:@"%@&%@=%@",post,key,obj];
        }

    }];
   NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding
   allowLossyConversion:YES];
   NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)
   [postData length]];
   NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
   [request setURL:[NSURL URLWithString:[NSString stringWithFormat:

   @"https://test.payu.in/_payment"]]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded"

   forHTTPHeaderField:@"Current-Type"];
    [request setHTTPBody:postData];

    [_webviewSample loadRequest:request];

==> Here Used One Method Which is Encrypted SHA512 Password:-

-(NSString *)createSHA512:(NSString *)string
{
    const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding];
    NSData *data = [NSData dataWithBytes:cstr length:string.length];
    uint8_t digest[CC_SHA512_DIGEST_LENGTH];
    CC_SHA512(data.bytes, (CC_LONG)data.length, digest);
    NSMutableString* output = [NSMutableString

    stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];
    for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];
    return output;
}