iOS UINavigationController and rotation

[Tiiba]

I made a complete program that reproduces the problem in my real program. Basically, I nest a button in a navigation controller, and I need to resize it when the device rotates.

The goal is to have the button touch the edges of the user area inside the nav controller in all orientations.

Initially, I don't see the button's bottom edge. Its side borders end about 0 pixels above the bottom of the screen.

I rotate to landscape, and I don't see any of the edges at all.

I rotate back to portrait, and I can't see the whole right half of the button.

WTF?

(For why I resize nav.view, see here: http://arstechnica.com/civis/viewtopic.php?f=20&t=1128641 It's the update for post #4. I tried to resize only the height of nav.view, but I couldn't see scrollbars in scrolling views, apparently because they were outside the screen. This was even after I resized the scrollview itself.)

@interface TestProjectAppDelegate : UIViewController <UIApplicationDelegate> 
{
	CGSize sizeOfView;
	
    UIWindow *window;
	UINavigationController* nav;
	UIButton* b;
	UIViewController* vc;
}

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

@end

#import "TestProjectAppDelegate.h"
#import "Globals.h"

@implementation TestProjectAppDelegate

@synthesize window;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
	b = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[b setTitle:@"Test" forState:UIControlStateNormal];
	vc = [UIViewController new];
	[vc.view addSubview:b];
	nav = [[UINavigationController alloc] initWithRootViewController:vc];
	self.view = [UIView new];
	[self.view addSubview:nav.view];
    [window addSubview:self.view];
    [window makeKeyAndVisible];
	return YES;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
	CGFloat w = window.frame.size.width;
	CGFloat h = window.frame.size.height;
	CGSize sz = CGSizeZero;
	
	switch (interfaceOrientation) {
		case UIInterfaceOrientationPortrait:
		case UIInterfaceOrientationPortraitUpsideDown:
			sz = CGSizeMake(MIN(w, h), MAX(w, h));
			break;
		case UIInterfaceOrientationLandscapeLeft:
		case UIInterfaceOrientationLandscapeRight:
			sz = CGSizeMake(MAX(w, h), MIN(w, h));
			break;
	}
	if (CGSizeEqualToSize(sz, sizeOfView))
	{
		return YES;
	}
	
	CGRect r = CGRectZero;
	r.size = sz;
	self.view.frame = r;
	nav.view.frame = r;
	r.size.height -= nav.navigationBar.frame.size.height;
	self.view.frame = r;
	b.frame = r;
	
	return YES;
}

- (void) viewDidAppear: (BOOL) animated
{
    //manually adjust the frame of the main view to prevent it from appearing under the status bar. (From Stack Overflow post.)
    UIApplication *app = [UIApplication sharedApplication];
	
    if(!app.statusBarHidden)
	{
        [self.view setFrame:CGRectMake(0.0,app.statusBarFrame.size.height, self.view.bounds.size.width, self.view.bounds.size.height - app.statusBarFrame.size.height)];
    }
	//corrects for the nav bar appearing 20 pixels too low for no damn reason.
	CGRect r = nav.navigationBar.frame;
	r.origin = CGPointZero;
	nav.navigationBar.frame = r;
}

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