Question

I am just curious with regards to the correct way to create a view controller programatically. When I compile this code with the static analyser I get a leak (as you would expect) from the alloc. Should I just leave it as it needs to stay until the app exits anyways, or is there a cleaner way?

- (BOOL)application:(UIApplication *)application
        didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    NSLog(@"UIApplication application:");
    RectViewController *myController = [[RectViewController alloc] init];
    [window addSubview:[myController view]];
    [window makeKeyAndVisible];
    return YES;
}

cheers Gary

Answer 1

In this case, keep a reference to your view controller as an instance variable on the AppDelegate and release it in the AppDelegate’s dealloc method.

@interface AppDelegate : NSObject {
    // ...
    RectViewController *myController;
}

// ...
@end


@implementation AppDelegate

// ...

- (BOOL)application:(UIApplication *)application
        didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    NSLog(@"UIApplication application:");
    myController = [[RectViewController alloc] init];
    [window addSubview:[myController view]];
    [window makeKeyAndVisible];
    return YES;
}

- (void) dealloc {
    // ...
    [myController release];

    [super dealloc];
}

// ...

@end