How do we dictate app orientation in iOS 8?

Question

In iOS 7 we said:

// ViewController1:

-(NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

-(BOOL)shouldAutorota         


        

Answer 1

The answer to part one (launching into landscape) is unchanged from iOS 7: everything depends on the order of possible orientations in the Info.plist file. So, let's say that View Controller 1 says this:

-(NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

Then we will coherently launch into landscape if a landscape orientation comes first in the Info.plist's supported interface orientations:

UISupportedInterfaceOrientations

    UIInterfaceOrientationLandscapeLeft
    UIInterfaceOrientationLandscapeRight
    UIInterfaceOrientationPortrait

One noteworthy change in iOS 8 is that by default the status bar is hidden when we're in landscape. But you can prevent this, if desired, with the appropriate override:

-(BOOL)prefersStatusBarHidden {
    return NO;
}

That doesn't answer the second part of my question, which is how to force rotation when a view controller is presented. As I have explained in this answer, my sense is that this will become impossible in iOS 8. Your view controller and your views are expected to "adapt" — and so are you.

EDIT: It looks like in seed 4 the ability to force app rotation on view controller presentation/dismissal is returning!