Incoherent orientation ov UIViewController and StatusBar when using UIImagePicker - iphone

Question

I've some UITabBarController. In landscape I hide tabBar and expand contents view. Code looks like this:
-(void)viewWillLayoutSubviews {
[super viewWillLayoutSubviews];
UIView *transView = [self.view.subviews objectAtIndex:0];
if(UIInterfaceOrientationIsLandscape(self.interfaceOrientation)) {
transView.frame = self.view.bounds;
self.tabBar.hidden = YES;
} else {
self.tabBar.hidden = NO;
CGRect frame = self.view.bounds;
frame.size.height = self.tabBar.frame.origin.y;
transView.frame = frame;
}
}
This handles orientation changes without problem.
Problem appeared when I've added usage of UIImagePicker. UIImagePicker enforces portrait orientation when it is shown (Apple breaks own UI rules: do not enforce orientation).
When application is in landscape and UIImagePicker is shown viewWillLayoutSubviews is invoked twice and UIInterfaceOrientationIsLandscape(self.interfaceOrientation) returns YES.
So far so good.
Now when UIImagePicker is closed (by picking a photo or cancel), viewWillLayoutSubviews is invoked once and UIInterfaceOrientationIsLandscape(self.interfaceOrientation) returns YES, so it should be ok, but result looks like this:
As can be seen status bar is in landscape (ok), UI is in portrait (fail): ui is show as in portrait, also UIController left a space for status bar (black stripe on left), UI is also clipped at top by status bar.
Now this looks like a iOS bug, since UIInterfaceOrientationIsLandscape(self.interfaceOrientation) returns YES but UI remains in portrait.
Environment: iOS 6.1.3 iPod Touch 5g.
Is there a way to fix it: make status bar remain on left xor enforce UI in landscape?
Update:
after further investigation I've noticed that willRotateToInterfaceOrientation and didRotateFromInterfaceOrientation are never called during this scenario. I even added this log in various places and it always prints "3 3 3 3" (UIInterfaceOrientationLandscapeLeft):
NSLog(#"%d %d %d %d",
self.navigationController.interfaceOrientation,
self.interfaceOrientation,
self.selectedViewController.interfaceOrientation,
[UIDevice currentDevice].orientation);
So state information says UIInterfaceOrientationLandscapeLeft but I see portrait UI and landscape status bar.
I've added this kind of logs to see when rotation is performed:
UIView *view = self.view;
int i=0;
while(view) {
CGAffineTransform trans = view.transform;
NSLog(#"Transform: %d %#", i, NSStringFromCGAffineTransform(trans));
++i;
view = view.superview;
}
In case of normal rotation (from portrait to landscape) log looks like this:
Transform: 0 [1, 0, 0, 1, 0, 0]
Transform: 1 [1, 0, 0, 1, 0, 0]
Transform: 2 [1, 0, 0, 1, 0, 0]
Transform: 3 [0, 1, -1, 0, 0, 0]
Transform: 4 [1, 0, 0, 1, 0, 0]
In problematic case: device in landscape, closing UIImagePicker:
Transform: 0 [1, 0, 0, 1, 0, 0]
Transform: 1 [1, 0, 0, 1, 0, 0]
Transform: 2 [1, 0, 0, 1, 0, 0]
Transform: 3 [1, 0, -0, 1, 0, 0]
Transform: 4 [1, 0, 0, 1, 0, 0]
Transform: 5 [1, 0, 0, 1, 0, 0]
This is strange that view stack has changed (increased by 1). Also it can be seen that view with index 3 is problematic.

Answer 1

I found EVIL HACK on this mysterious issue:
- (void)doAWorkaroudnOnUnwantedRotation {
// check if is workaround nesesery:
if (UIInterfaceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
double delayInSeconds = 0.5;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
UIViewController *fake = [[[UIViewController alloc] init] autorelease];
UIViewController *rootController = [UIApplication sharedApplication].keyWindow.rootViewController;
[rootController presentModalViewController: fake animated: NO];
[fake dismissModalViewControllerAnimated: NO];
});
}
}
I call this method when UIImagePicker is dismissed. Without dispatch_after nothing happens since picker is animated and until animation finishes this workaround will not work.