cocos2d + GKMatchmakerViewController causes portrait mode - cocos2d-iphone

Question

I'm implementing Game Kit in a cocos2d game project.
The game is landscape orientation only. And so should gamekit also be.
When I present the gamekit modal viewcontroller for matchmaking, it displays in landscape. But the underlying cocos2d CCLayer becomes portrait.
The rootViewContollers orientation code looks like this:
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
//
// There are 2 ways to support auto-rotation:
// - The OpenGL / cocos2d way
// - Faster, but doesn't rotate the UIKit objects
// - The ViewController way
// - A bit slower, but the UiKit objects are placed in the right place
//
#if GAME_AUTOROTATION==kGameAutorotationNone
//
// EAGLView won't be autorotated.
// Since this method should return YES in at least 1 orientation,
// we return YES only in the Portrait orientation
//
return ( interfaceOrientation == UIInterfaceOrientationPortrait );
#elif GAME_AUTOROTATION==kGameAutorotationCCDirector
//
// EAGLView will be rotated by cocos2d
//
// Sample: Autorotate only in landscape mode
//
if( interfaceOrientation == UIInterfaceOrientationLandscapeLeft ) {
[[CCDirector sharedDirector] setDeviceOrientation: kCCDeviceOrientationLandscapeRight];
} else if( interfaceOrientation == UIInterfaceOrientationLandscapeRight) {
[[CCDirector sharedDirector] setDeviceOrientation: kCCDeviceOrientationLandscapeLeft];
}
// Since this method should return YES in at least 1 orientation,
// we return YES only in the Portrait orientation
return ( UIInterfaceOrientationIsLandscape(interfaceOrientation) );
#elif GAME_AUTOROTATION == kGameAutorotationUIViewController
//
// EAGLView will be rotated by the UIViewController
//
// Sample: Autorotate only in landscpe mode
//
// return YES for the supported orientations
return ( UIInterfaceOrientationIsLandscape( interfaceOrientation ) );
#else
#error Unknown value in GAME_AUTOROTATION
#endif // GAME_AUTOROTATION
// Shold not happen
return NO;
}
It makes no difference if I define GAME_AUTOROTATION to kGameAutorotationUIViewController or kGameAutorotationCCDirector or kGameAutorotationNone

Answer 1

So I believe I have found a fix.
In my AppDelegate I made these changes:
//[window addSubview: viewController.view];
[window setRootViewController:viewController];
Then orientation worked perfectly on iOS6, but on iOS versions prior to iOS6 the width and height of the window size was reversed, and caused issues for the game. I solved that by adding a blank scene before running my normal scene, because the reverse size was fixed by itself when pushing a new scene. From the blank scene I ran [[CCDirector sharedDirector] replaceWithScene:[Game scene]]; after a delay, and it works now.