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

You could check it like so (Swift 3):

var isPortrait: Bool {
  let orientation = UIDevice.current.orientation
  switch orientation {
    case .portrait, .portraitUpsideDown:
      return true

    case .faceUp, .faceDown:
      // Check the interface orientation
      let interfaceOrientation = UIApplication.shared.statusBarOrientation
      switch interfaceOrientation{
        case .portrait, .portraitUpsideDown:
          return true
        default:
          return false
      }
   default: // .unknown
     return false // not very satisfying to return false as if we were in landscape :-/
   }
}

If you are in a ViewController, you can also do like so (that is what I ended up doing):

private var isPortrait: Bool {
    let orientation = UIDevice.current.orientation
    switch orientation {
    case .portrait, .portraitUpsideDown:
        return true
    case .landscapeLeft, .landscapeRight:
        return false
    default: // unknown or faceUp or FaceDown
        return self.view.width < self.view.height
    }
}

Although even this should be enough in that case:

private var isPortrait: Bool {
     return self.view.width < self.view.height
}