设备方向为faceDown或faceUp时如何获取界面方向？

Question

I'm setting the orientation for AVCaptureVideoOrientation by getting the current device orientation, however I'm having trouble to get the interface orientation when the device is faceDown or faceUp. Any help would be greatly appreciated. Thanks in advance

private func configureDeviceOrientation() {
    var videoOrientation: AVCaptureVideoOrientation {
        switch UIDevice.current.orientation {
        case .faceUp, .faceDown:
            //I don't know whether the interface orientation is landscapeLeft
            //or landscapeRight nor do I know how to check.
    }
}

interfaceOrientation is deprecated from iOS 8 and this is a framework, therefore I don't have access to UIApplication.shared

Answer 1

Add to viewWillAppear to check if device is rotated:

   //Observer for if Device Rotated
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(device_rotated),
                                            name:UIDevice.orientationDidChangeNotification,
                                               object: nil)

Add to viewWillDisappear:

 NotificationCenter.default.removeObserver(self)

Add to viewController. Function will be called if device is rotated or orientation changed:

@objc func device_rotated(notification:Notification) -> Void{

    switch UIDevice.current.orientation {
    case .landscapeLeft, .landscapeRight:
        print("Landscape")
    case .portrait, .portraitUpsideDown:
        print("Portrait")
    case .faceUp:
        print("Face Up")
    case .faceDown:
        print("Face Down")
    default:
        print("Default")
    }

}

Answer 2

Use self.view.window?.windowScene?.interfaceOrientation in place of UIDevice.current.orientation .

This value will be either portrait , portraitUpsideDown , landscapeRight , or landscapeLeft .

See here for documentation.