Parsing JSON

gistfile1.txt

if(!error) {
    NSData *jsonData = [json dataUsingEncoding:NSASCIIStringEncoding];
    NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                options:kNilOptions
                                                                  error:&error];
    NSLog(@"JSON: %@", jsonDict);
}
NSString *promo_url = [jsonDict objectForKey:@"promo_url"];