init(coder:) Creates a bar button item group from data in an unarchiver. Declarationinit?(coder: NSCoder) See AlsoCreating a groupfixedGroup(representativeItem:items:)movableGroup(customizationIdentifier:representativeItem:items:)optionalGroup(customizationIdentifier:isInDefaultCustomization:representativeItem:items:)init(barButtonItems:representativeItem:)