UIScreen screens always return 1 screen

I'm trying to display a picture on Apple TV with Airplay without mirroring mode. But [UIScreen screens] method always return 1 screen (main screen) when mirroring is OFF. I want my picture display same as Photo application (Airplay without mirroring).

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(screenDidConnect:) name:UIScreenDidConnectNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(screenDidDisconnect:) name:UIScreenDidDisconnectNotification object:nil];

I used them, but they only work when Mirroring is ON.

Please help me. Thanks so much! I'm using Apple TV1 and iPad 2 (iOS 5.0.1)

Solution

Well, it's a bit misleading, indeed. You should proceed as follows:

Airplay mirroring option should be ON
then, you create a new UIWindow and attach it to the second screen
as soon as you send makeKeyAndVisible to this new UIWindow, it overrides mirroring and shows new content.
You may add views or a root view controller as in the main part of application

Here's the code:

UIScreen *secondScreen = [[UIScreen screens] objectAtIndex:1];
self.secondWindow = [[UIWindow alloc] initWithFrame:secondScreen.bounds];
[self.secondWindow setScreen:secondScreen];
[self.secondWindow setBackgroundColor:[UIColor greenColor]];
[self.secondWindow makeKeyAndVisible];