Autorotation of UIViewController works only when view is added in specific order

Question

Hello together

I'm trying to add rotation support to our application which we are currently developing. Unfortunately its not working. So I created a small test project to test what the reason could be. And I found a strange behavior which I cannot explain.

In my test project I have two RotationTestViewController (extended from UINavigationControllers) instances. The first UINavigationController will be displayed on application start and it shows an label and a button in the view. When we click on this button the following code will get executed:

- (void) doIt {
 RotationTestViewController *navCon = [[[RotationTestViewController alloc] init] autorelease];

 UIViewController *uvc = [[[UIViewController alloc] init] autorelease];
 UIBarButtonItem *retryButton =  [[[UIBarButtonItem alloc] initWithTitle:@"Back to view 1" style:UIBarButtonItemStyleDone target:self action:@selector(doItBack)] autorelease];
 uvc.navigationItem.rightBarButtonItem = retryButton;
 uvc.title = @"View 2";

 CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
 CGRect r = CGRectMake(0, 0, webFrame.size.width, webFrame.size.height);
 UILabel *label = [[[UILabel alloc] initWithFrame:r] autorelease];
 label.text = @"View 2 Test";

 uvc.view.autoresizesSubviews = YES;
 label.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

 [uvc.view addSubview:label];

 [navCon pushViewController:uvc animated:NO];

 self.viewController2 = navCon;

 // Override point for customization after app launch    
 [window addSubview:navCon.view]; // LINE A
 [[[window subviews] objectAtIndex:0] removeFromSuperview];
 //[window addSubview:navCon.view]; // LINE B
}

RotationTestViewController is my custom subclass of the UINavigationController and enables the rotation of the controller (It returns YES). The interesting thing is now that this view 2 which will shown by this code will not rotate.

But when I comment LINE A out and comment LINE B in the view is able to rotate as it should. My problem is that I don't understand the reason for this behavior.

I have tested this with the Simulator (for the version 2.2/2.2.1 and 3.0) and on the device (for the version 2.2 and 2.2.1)

Here you can download my simple test project: http://vmac.ch/RotationTest.zip

I hope someone has an idea what the reason for this could be.

Thanks and greetings Chris