Open Radar

 
On the iPad, in landscape, the children of a tab bar controller can't be tapped on the right hand side of the screen.  This seems to be because the child is wrapped in a UIViewControllerWrapperView which remains at 768x1024 instead of resizing, as in the following:

(lldb) po [[[[UIApplication sharedApplication] delegate] window] recursiveDescription]
<UIWindow: 0xc343110; frame = (0 0; 768 1024); gestureRecognizers = <NSArray: 0xc343650>; layer = <UIWindowLayer: 0xc343370>>
   | <UILayoutContainerView: 0xc341160; frame = (0 0; 768 1024); transform = [0, -1, 1, 0, 0, 0]; autoresize = W+H; layer = <CALayer: 0xc341240>>
   |    | <UITransitionView: 0xc341af0; frame = (0 0; 1024 768); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0xc341bd0>>
   |    |    | <UIViewControllerWrapperView: 0xc342c30; frame = (0 0; 768 1024); layer = <CALayer: 0xc342d00>>
   |    |    |    | <UIView: 0xc33b230; frame = (0 0; 1024 768); layer = <CALayer: 0xc33b290>>
   |    |    |    |    | <UIButton: 0xc33bd60; frame = (880 44; 100 44); opaque = NO; autoresize = LM+BM; layer = <CALayer: 0xc33be50>>
   |    |    |    |    |    | <UIButtonLabel: 0xc33e1e0; frame = (25 13; 50 18); text = 'Tap me'; clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0xc33e310>>
   |    | <UITabBar: 0xc341590; frame = (0 712; 1024 56); autoresize = W+TM; layer = <CALayer: 0xc3416b0>>
   |    |    | <_UITabBarBackgroundView: 0x8c7ff90; frame = (0 0; 1024 56); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x8c80060>> - (null)
   |    |    |    | <_UIBackdropView: 0x8c47e90; frame = (0 0; 1024 56); opaque = NO; autoresize = W+H; userInteractionEnabled = NO; layer = <_UIBackdropViewLayer: 0x8c81d10>>
   |    |    |    |    | <_UIBackdropEffectView: 0x8c82570; frame = (0 0; 1024 56); clipsToBounds = YES; opaque = NO; autoresize = W+H; userInteractionEnabled = NO; layer = <CABackdropLayer: 0x8c82840>>
   |    |    |    |    | <UIView: 0x8c82fe0; frame = (0 0; 1024 56); hidden = YES; opaque = NO; autoresize = W+H; userInteractionEnabled = NO; layer = <CALayer: 0x8c83040>>
   |    |    | <UITabBarButton: 0xc342220; frame = (474 1; 76 55); opaque = NO; layer = <CALayer: 0xc3427f0>>
   |    |    | <UIImageView: 0x8c83d50; frame = (0 -1; 1024 1); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x8c83e60>> - (null)

Because the 1024x768 view is contained inside this 768x1024 wrapper view, only the left hand 768px are tappable.

Steps to reproduce:
1. Create a view controller inside a UITabBarController with a tappable target on the right hand side.
2. Rotate the device to landscape
3. Tap the target

Expected Results:
The target does not receive the tap.

Actual Results:
The target does not receive the tap.

Additional Notes:
The problem can be worked around by subclassing UITabBarController and overriding -viewDidLayoutSubviews:

- (void)viewDidLayoutSubviews
{
    self.selectedViewController.view.superview.frame = self.view.bounds;
    [super viewDidLayoutSubviews];
}