Convert JSON string to dictionary or array

- (id)toArrayOrNSDictionary:(NSData *)jsonData{

    NSError *error = nil;

    id jsonObject = [NSJSONSerialization JSONObjectWithData: jsonData

                                                    options:NSJSONReadingAllowFragments

                                                      error:&error];

    

    if (jsonObject != nil && error == nil){

        return jsonObject;

    }else{

        // parsing error

         return nil;

    }

 

}