UITabBar items jumping on back navigation on iOS 12.1

Question

I have an iOS app with UITabBarController on a master screen, navigating to a detail screen hiding the UITabBarController with setting hidesB

Answer 1

Here's a solution that can handle rotation and tab bar items being added or removed:

class FixedTabBar: UITabBar {

    var buttonFrames: [CGRect] = []
    var size: CGSize = .zero

    override func layoutSubviews() {
        super.layoutSubviews()

        if UIDevice.current.systemVersion >= "12.1" {
            let buttons = subviews.filter {
                String(describing: type(of: $0)).hasSuffix("Button")
            }
            if buttonFrames.count == buttons.count, size == bounds.size {
                zip(buttons, buttonFrames).forEach { $0.0.frame = $0.1 }
            } else {
                buttonFrames = buttons.map { $0.frame }
                size = bounds.size
            }
        }
    }
}