consume json webservice from IOS with null

Vote count:

0

I use code like the following

  NSString *urlAsString = [NSString stringWithFormat:@"urladdress", coordinate.latitude, coordinate.longitude, PAGE_COUNT, API_KEY];
    NSURL *url = [[NSURL alloc] initWithString:urlAsString];
    NSLog(@"%@", urlAsString);

but i have web service method that take string as parmaeter (may be null or empty) how to create the url of this method

i tried http://ift.tt/1o49XbU

how to continue to add the parameters

asked 27 secs ago

AMH

1,395