With the iPhone, we used to concern ourselves merely with the Default.png file that we defined in our application plist. With the iPad, we now need to anticipate the device launching the app through numerous orientations, and we need to cater for that.
Apple have defined new naming conventions to cater for the image dimensions/screen size, taking into account the 20 pixel status bar.
|Default-Portrait.png *||768w x 1004h|
|Default-PortraitUpsideDown.png||768w x 1004h|
|Default-Landscape.png **||1024w x 748h|
|Default-LandscapeLeft.png||1024w x 748h|
|Default-LandscapeRight.png||1024w x 748h|
Apple has recommended that we configure our application views upon startup in the preferred orientation, inside the application:didFinishLaunchingWithOptions: method, so that the system notifies the app delegate of the current orientation, allowing you to arrange your views as needed.