iOS 11 prefersLargeTitles not expanding after orientation change

Question

I've implemented the iOS 11 feature prefersLargeTitles and it works just fine. Portrait mode is working as expected:

I understand the large title will always stay collapsed (small) in landscape mode and that's fine to me. The problem is when I try to change to landscape and then again to portrait, the large title should be expanded (big) by default back in portrait mode, but it won't until I scroll down a bit:

My code looks quite simple:

if #available(iOS 11.0, *) {
  navigationController?.navigationBar.prefersLargeTitles = true
  navigationItem.largeTitleDisplayMode = .always
}

I also tried using different values on tableView.contentInsetAdjustmentBehavior, nothing changed. I'm kind of solving it by now scrolling down the table programmatically after orientation changes, but I think that's just a (not very nice) workaround.

Is that supposed to be working as expected? Is it something left in my implementation? Is there a better workaround to this?

Answer 1

I faced the same issue. This worked for me.

    override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
        navigationItem.largeTitleDisplayMode = .always
        coordinator.animate(alongsideTransition: { (_) in
            self.coordinator?.navigationController.navigationBar.sizeToFit()
        }, completion: nil)
    }