iPad Landscape and Portrait different layouts with Size Class

Question

How to design iPad Landscape and Portrait screens with different Layouts using Size class. I could find only w-regular and h-regular for both orientations. Example: I need to align 2 views vertically in portrait and horizontally in landscape using Size Class

Answer 1

Finally I found a solution :

if traitCollection.verticalSizeClass == .Regular && traitCollection.horizontalSizeClass == .Regular {

     var orientation:UIInterfaceOrientation = UIApplication.sharedApplication().statusBarOrientation;
     if orientation == UIInterfaceOrientation.LandscapeLeft || orientation == UIInterfaceOrientation.LandscapeRight {
            // orientation is landscape


     }  else {
            // orientation is portrait

     }
}

Answer 2

It appears to be Apple's intent to treat both iPad orientations as the same -- but as a number of us are finding, there are very legitimate design reasons to want to vary the UI layout for iPad Portrait vs. iPad Landscape.

However, please see this answer for another approach to adapting size classes to do what we need: https://stackoverflow.com/a/28268200/4517929