disable UIAppearance-API happen on RemoteViewControllers - iphone

Question

So i am styling all my views using the apprearance api.
F.e. i style my UINavigationBar using:
[[UINavigationBar appearance] setBackgroundImage:navigationBarBgImage forBarMetrics:UIBarMetricsDefault];
i want to use the advantage of the appearance api of styling all my UINavigationBars in one single place (because i have multiple of them), so i don't want to do some subclassing only because of styling reasons.
i also popup some MFMessageComposeViewControllers and a SLComposeViewController to post to imessage or facebook.
my problem here is, if i try to select albums on facebook or select contacts on imessage modalview, this happens:
see the recursive description of the imessage modal view:
$0 = 0x1f1f1320 <UIWindow: 0x1e5c8900; frame = (0 0; 320 568); layer = <UIWindowLayer: 0x1e5c8a00>>
| <UILayoutContainerView: 0x1e592860; frame = (0 0; 320 568); autoresize = W+H; layer = <CALayer: 0x1e592910>>
| | <UINavigationTransitionView: 0x1f1c88a0; frame = (0 0; 320 568); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x1f1c8960>>
| | | <UIViewControllerWrapperView: 0x1f1ee090; frame = (0 20; 320 548); autoresize = W+H; layer = <CALayer: 0x1f2f9560>>
| | | | <UIView: 0x1f2f3d20; frame = (0 0; 320 548); autoresize = W+H; layer = <CALayer: 0x1f2f3d80>>
| | | | | <_UISizeTrackingView: 0x1f2effd0; frame = (0 0; 320 548); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x1f2f00b0>>
| | | | | | <_UIRemoteView: 0x1f2f01e0; frame = (0 0; 320 568); transform = [0.5, -0, 0, 0.5, -0, 0]; userInteractionEnabled = NO; layer = <CALayerHost: 0x1f2f0330>>
any ideas whats the best to switch back there to default mode?

Answer 1

Your best bet is really to subclass one thing or the other. Otherwise you'll be undoing styles everywhere. I'll do it in one of two ways:
One is to subclass UINavigationController and style the UINavigationBar contained by that class:
UINavigationBar *navigationBarProxy = [UINavigationBar appearanceWhenContainedIn:[MyNavigationController class], nil]; //
[navigationBarProxy setBackgroundImage:navigationBarBackgroundImage forBarMetrics:UIBarMetricsDefault];
// and so on
Another method is to subclass UINavigationBar instead, set the appearance for that class, and instantiate your UINavigationController this way:
UINavigationController *navigationController = [[UINavigationController alloc] initWithNavigationBarClass:[MyNavigationBar class] toolbarClass:nil];
// navigationController now has a navigationBar of your preferred type

Answer 2

Well, possible solution is set navigation bars to theirs original tint color with [UINavigationBar appearanceWhenContainedIn:[SLComposeViewController class]] ...

Answer 3

I hit the same problem and, worse, it was causing my app to crash for any of the XPC/UIRemoteView based controllers, including SLComposeViewController and MFMailComposeViewController.
My solution is to use this:
[[UINavigationBar appearanceWhenContainedIn:[RootViewController class], nil] setBackgroundImage:[UIImage imageNamed:#"navbar.png"] forBarMetrics:UIBarMetricsDefault];
instead of:
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:#"navbar.png"] forBarMetrics:UIBarMetricsDefault];
where RootViewController is whatever you've named the UIViewController that contains all of your app's subviews.
It doesn't work for everything (depends on how a controller ends up in the hierarchy) but, hey, it's something.