On iOS 12.1 I've solved this issue by overriding safeAreaInsets in the UITabBar subclass:
class TabBar: UITabBar {
private var cachedSafeAreaInsets = UIEdgeInsets.zero
override var safeAreaInsets: UIEdgeInsets {
let insets = super.safeAreaInsets
if insets.bottom < bounds.height {
cachedSafeAreaInsets = insets
}
return cachedSafeAreaInsets
}
}
For iOS 13.0 onward,
class TabBar: UITabBar {
private var cachedSafeAreaInsets = UIEdgeInsets.zero
let keyWindow = UIApplication.shared.connectedScenes
.filter { $0.activationState == .foregroundActive }
.compactMap { $0 as? UIWindowScene }
.first?.windows
.filter { $0.isKeyWindow }
.first
override var safeAreaInsets: UIEdgeInsets {
if let insets = keyWindow?.safeAreaInsets {
if insets.bottom < bounds.height {
cachedSafeAreaInsets = insets
}
}
return cachedSafeAreaInsets
}
}