BooksTabVisibilityObserving
@MainActor
public protocol BooksTabVisibilityObserving : AnyObjectAdopted by a books tab’s content view controller (or a container that forwards to it) so the hosting standalone tab can tell it when it actually becomes the visible tab, or is hidden.
UIKit appearance callbacks are not a reliable “the user is looking at this tab” signal for the
standalone tab hosts: the swiper hosts page views (not view controllers), so viewDidAppear(_:)
does not re-fire on revisit. Tabs forward their own per-visit signal through this protocol
instead, so a screen can fire its “open” analytics event only when it is actually visited.
-
Undocumented
Declaration
Swift
@MainActor func booksTabDidBecomeVisible() -
Undocumented
Declaration
Swift
@MainActor func booksTabDidBecomeHidden()