Parse JSON with Objective-C.

gistfile1.m

NSError *error = nil;
id jsonObject = [NSJSONSerialization
                     JSONObjectWithData:[string dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingAllowFragments error:&error];
if (jsonObject != nil && error == nil) {
  NSLog(@"Successfully deserialized...");
  if ([jsonObject isKindOfClass:[NSDictionary class]]) {
    NSDictionary *deserializedDictionary = (NSDictionary *)jsonObject;
    NSLog(@"Deserialized JSON Dictionary = %@", deserializedDictionary);
            
  } else if ([jsonObject isKindOfClass:[NSArray class]]) {
    NSArray *deserializedArray = (NSArray *)jsonObject;
    NSLog(@"Deserialized JSON Array = %@", deserializedArray);

  } else {
    /* Some other object was returned. We don't know how to deal
       with this situation, as the deserializer returns only dictionaries
       or arrays */
  }
} else {
  if (error != nil) {
    NSLog(@"An error happened while deserializing the JSON data.");
  }
}