Question

In my AppDelegate I have a reference to an NSObject like this:

@interface MyAppDelegate : NSObject <UIApplicationDelegate>
{
    MyObjectManager * myObjectManager;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;

@property (nonatomic, retain) MyObjectManager * myObjectManager;

I want to access this from my UIViewController, so I do this:

MyAppDelegate * appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
MyObjectManager * myObjectManager = appDelegate.myObjectManager;
maMyArray = [[NSMutableArray alloc] init];

[[appDelegate myObjectManager] findMyStuff:5 foundArray:maMyArray];
//[myObjectManager findMyStuff:5 foundArray:maMyArray];

However, I think I am not understanding the syntax in Objective C correctly because I throw an exception, EXC_BAD_ACCESS. When I look at the values, they seem correct.

Can someone please explain what I am doing wrong?

Thanks

Answer 1

You have to initialize myObjectManager somwhere:

myObjectManager = [[MyObjectManager alloc] init];

The best place is probably in the - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions method.

Don’t forget to release it in the dealloc.