I have a wide "dock" area at the bottom of the screen. I have placed a UIFocusGuide across the top of it. Depending on which element in the dock has focus, the system may or may not have a focus solution if the user swipes up.
How can I tell my focus guide to use the system-calculated new focus item if there is one, but if not, it should use the one configured in my setPreferredFocusEnvironments:
Alternatively, is there a way to determine where a "swipe up" will take the focus without actually doing it? As the focused element in the dock changes, I could check this and if it has no destination provided by the system, I can add one.
My dock is a view within a main view controller but preferredFocusEnvironments is never called when the user tries to move to a non-existent view from an element in the dock.