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if UIDevice.current.userInterfaceIdiom == .pad {
    let leftMargin = view.readableContentGuide.layoutFrame.minX
    navigationController?.navigationBar.layoutMargins.left = leftMargin
}

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    coordinator.animate(alongsideTransition: { _ in
        let leftMargin = self.view.readableContentGuide.layoutFrame.minX
        self.navigationController?.navigationBar.layoutMargins.left = leftMargin
    }, completion: nil)
}