👀 Views: 31 💬 Answers: 1 📅 Created: 2025-06-08

iOS UINavigationController custom transitions layout Swift

I just started working with I'm refactoring my project and I'm implementing a custom transition animation for navigating between two view controllers using a subclass of `UINavigationController`. The transition works well, but I'm encountering unexpected layout issues after the transition completes. Specifically, the destination view controller appears to be offset by the height of the navigation bar, leading to an awkward layout. I've verified that the `viewWillLayoutSubviews` method is being called, and I ensure layout is recalculated, but the offset persists. Here’s a snippet of my transition code: ```swift class CustomNavigationController: UINavigationController, UINavigationControllerDelegate { override func viewDidLoad() { super.viewDidLoad() self.delegate = self } func pushViewController(_ viewController: UIViewController, animated: Bool) { if animated { let transition = CATransition() transition.duration = 0.5 transition.type = .fade self.view.layer.add(transition, forKey: kCATransition) } super.pushViewController(viewController, animated: false) } } ``` I tried setting the `automaticallyAdjustsScrollViewInsets` property to false on the view controller being pushed, but it didn't help. Additionally, I've double-checked the view controller's constraints to make sure that nothing is conflicting with the layout. I also logged the frames of the view before and after the transition, and they seem incorrect, especially the `view.bounds` values. Is there something specific I need to adjust in the transition or the view layout to ensure it behaves correctly? Any insights into why this layout issue happens post-transition would be greatly appreciated. This is for a mobile app running on CentOS. I'd love to hear your thoughts on this. I'm coming from a different tech stack and learning Swift. Thanks for any help you can provide! I'm developing on Debian with Swift.