iOS 5.0+ made it a whole lot easier working with them as Dictionary objects

gistfile1.txt

NSData *jsonData = [fixJSONString dataUsingEncoding:NSUTF8StringEncoding];
NSMutableArray *jsonArray = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&parseError];
 
if (jsonArray)
{
 
    NSMutableArray *userObjects = [[NSMutableArray alloc]init];
     
    for(NSDictionary *item in jsonArray) {
 
        UserObject *userObject = [[UserObject alloc] init]; 
 
        NSLog(@"Item: %@", item);
         
        for (id key in item) {
            NSLog(@"key: %@, value: %@", key, [item objectForKey:key]);
            if ([key isEqualToString:@"emailaddress"])
            {
                userObject.emailAddress = [item objectForKey:key];
            } else if ([key isEqualToString:@"firstname"]) {
                userObject.firstName = [item objectForKey:key];
            }
        }
         
        [userObjects addObject:userObject];
         
    }
     
    //let's say you built out your prior DataController to be able to support multiple objects coming in
    //reference post http://ssbits.wordpress.com/2012/08/22/database-integration-with-an-app
    DataController *dataController = [[DataController alloc]init];    
    [dataController initDatabase];
    [dataController insertUserObjects:userObjects];
     
} else {
    NSLog(@"Error parsing JSON: %@", parseError);
    NSLog(@"JSON is nil");
}