Question

I have a question about the memory management. In my app delegate, I have the following method; where welcomeViewController is an ivar.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    welcomeViewController = [[CBWelcomeViewController alloc] init];
    UINavigationController *appNavigationController = [[UINavigationController alloc] initWithRootViewController:welcomeViewController];
    [self.window addSubview: [appNavigationController view]];
    [self.window makeKeyAndVisible];
    return YES;
}

To release the memory for welcomeViewController, I simply call release on it in the dealloc method.

- (void)dealloc {
    [welcomeViewController release];
    [window release];
    [super dealloc];
}

My question is, what is the correct way to manage the memory of appNavigationController?

Answer 1

You should make appNavigationController an instance variable and release it in dealloc.

You do not need to have welcomeViewController as an instance variable, quite the opposite.
Simply alloc/init it, then pass it off to the UINavigationController, which then retains it, then immediately release it.