iOS 18 tab switch flashes screen

Question

I just noticed when building my app with Xcode 16 (iOS 18) that the screen flashes briefly when switching tabs (using a standard UITabBarController). Have any one of you experienced it? I have searched documentation and can not find anything mentioning changes in the behaviour. I also tried implementing the following methods of UITabBarControllerDelegate:

func tabBarController(_ tabBarController: UITabBarController, animationControllerForTransitionFrom fromVC: UIViewController, to toVC: UIViewController) -> (any UIViewControllerAnimatedTransitioning)? {
        nil
    }
func tabBarController(_ tabBarController: UITabBarController, interactionControllerFor animationController: any UIViewControllerAnimatedTransitioning) -> (any UIViewControllerInteractiveTransitioning)? {
        nil
    }

How can I get rid of the flashing?

Answer 1

Temporarily solved it by setting UIView.setAnimationsEnabled(false) in func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool

And then setting UIView.setAnimationsEnabled(true) in func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController)

Answer 2

To fix the flicker without removing the animation you can try adding this in your view controller viewDidLoad function:

tabBarController?.view.backgroundColor = .clear

It worked in my case.