Question

I’m getting a white screen after presenting a modal view controller. This is how I do it:

SomeViewController *controller = [[[SomeViewController alloc] initWithManagedObjectContext:managedObjectContext] autorelease];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:controller] autorelease];
[navController setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentModalViewController:navController animated:YES];

The navigation bar works fine, as I set it up in SomeViewController, but the view’s contents are not visible, and all I see is the white background color of the root window.

The strange thing is, that this used to work, but now it doesn’t for some reason.
What could be the problem?

EDIT:

This is how I create SomeViewController:

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self setTitle:@"Some View"];

    UIBarButtonItem *sortButton = [[[UIBarButtonItem alloc] initWithTitle:@"Sort" style:UIBarButtonItemStylePlain target:self action:@selector(sortButtonClicked:)] autorelease];
    [[self navigationItem] setRightBarButtonItems:[NSArray arrayWithObjects:sortButton, [self editButtonItem], nil] animated:YES];

    UIBarButtonItem *backButton = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(dismissModalViewControllerAnimated:)] autorelease];
    [[self navigationItem] setLeftBarButtonItem:backButton];

    // Hack to force landscape orientation
    UIViewController *controller = [[UIViewController alloc] init];
    [self presentModalViewController:controller animated:NO];
    [self dismissModalViewControllerAnimated:NO];
    [controller release];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
}

- (void) viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return UIInterfaceOrientationIsLandscape(interfaceOrientation);
}

Answer 1

The white screen was caused by the xib file of the controller not being part of the target(its target membership checkbox was unchecked).