standardAppearance
The appearance settings for a tab bar.
Declaration
@NSCopying var standardAppearance: UITabBarAppearance? { get set }Discussion
When a tab bar displays the selected item, the appearance setting in this property overrides the settings in the standardAppearance property of UITabBar.
Use this property to apply a tab bar appearance based on the tab bar item stored in the selectedItem property. If the selected item’s standardAppearance property is nil, UIKit uses the tab bar’s standard appearance.