Modal View Controller force Landscape orientation in iOS 6

Question

I have a UITabBarController presented in Portrait mode. On one of the tabs I have a button that shows a UIViewController modally (A simple storyboard segue performs the action).

Answer 1

I do exactly this in my app, and do it via shouldAutoRotateToInterfaceOrientation, slightly differently than you:

- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
 if (UIInterfaceOrientationIsLandscape(interfaceOrientation))
  return (YES);
 return (NO);
}

for iOS 6, you must also set window.rootViewController = {your root view controller}; in your app delegate. I'm hoping this is your issue