not an issue - but consider supporting ios12 out of the box

[8secz-johndpope]

@objc
private func orientationDidChange() {
    if #available(iOS 13.0, *) {
        guard let orientation = UIApplication.shared.windows.first?.windowScene?.interfaceOrientation else { return }
        // called to reinitialize the engine with the new camera and rendering resolution
              arView.change(orientation)
    } else {
        // Fallback on earlier versions
    }

}