iPad orientation is not only four in iOS - ipad

Question

Now i realized when i writing my app for only iPad version.
My iPad iOS Version is iOS 5.1.
Yes, i need to check the iPad Orientation before load my Data.
So i check with following codes.
if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation))
{
self.originalLandScape = CGRectMake(0, 48, 1024, 704);
self.originalPortrait = CGRectMake(0, 48, 768, 960);
self.txtView.frame = self.originalLandScape;
}
else
{
self.originalPortrait = CGRectMake(0, 48, 768, 960);
self.originalLandScape = CGRectMake(0, 48, 1024, 704);
self.txtView.frame = self.originalPortrait;
}
Because i need to set the fix size to my UITextView.
However i realized that when my iPad is with Landscape and put down to floor horizontally , It's not correct to set UITextView size.
But when i get my iPad from floor and holding in my hand with Landscape like reading book , my above codes is work.
Is there any different between those two?
I don't know how to solve it.
Thanks you for any suggestions and helps.

Answer 1

You are correct - iPad orientation is not only four, it is six:
UIDeviceOrientationLandscapeLeft
UIDeviceOrientationLandscapeRight
UIDeviceOrientationPortrait
UIDeviceOrientationPortraitUpsideDown
UIDeviceOrientationFaceUp
UIDeviceOrientationFaceDown
Your else clause therefore applies not just to the Portrait orientations, but to FaceUp and FaceDown as well.
I suspect that what you actually want to use is the Interface orientation. This may or may not be the same orientation as the Device orientation (depending on your app's supported orientations) - but if you want to draw a UI element correctly for a particular orientation, it will be the orientation of the rest of the interface that matters, not the device orientation.
There are only four interface orientations:
UIInterfaceOrientationLandscapeLeft
UIInterfaceOrientationLandscapeRight
UIInterfaceOrientationPortrait
UIInterfaceOrientationPortraitUpsideDown
You can get these with the UIViewController property interfaceOrientation and check them with the UIKit functions UIInterfaceOrientationIsLandscape() and UIInterfaceOrientationIsPortrait()
Try this in your code
if(UIInterfaceOrientationIsLandscape(self.interfaceOrientation))) {
...
} else {
...
}