ipad＆iphoneのデバイスの向きの対応

以下のソースを参考にするとできます。

UIDeviceOrientation orientation = [[notification object] orientation];

if (orientation == UIDeviceOrientationLandscapeLeft) {
...
} else if (orientation == UIDeviceOrientationLandscapeRight) {
...
} else if (orientation == UIDeviceOrientationPortraitUpsideDown) {
...
} else if (orientation == UIDeviceOrientationPortrait) {
...
}