How to check in which position (landscape or portrait) is the iPhone now?

Question

I have an app with a tab bar, and nav controllers in each tab. When user shakes the device, a UIImageView appears as a child view in the nav controller. But the

Answer 1

Updating this to iOS 8+ where the UIViewController.interfaceOrienation is deprecated, you should use traitCollections. So for example, to check for landscape on iPhone, you'd use:

if self.traitCollection.verticalSizeClass == .compact
{
  your code
}

Notice that this is not the case on iPad, because on iPad in landscape, the size class is not compact. Apple Doc Link