-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
UIDeviceOrientationUnknown
UIDeviceOrientationPortrait
UIDeviceOrientationPortraitUpsideDown
UIDeviceOrientationLandscapeLeft
UIDeviceOrientationLandscapeRight
UIDeviceOrientationFaceUp
UIDeviceOrientationFaceDown
