@available(iOS 11.0, tvOS 11.0, *) public class FocusMonitor : BaseNotificationMonitor
FocusMonitor instance monitors the app for changes to the current focus
in the view hierarchy.
Initializes a new
The options that specify which events to monitor. By default, all events are monitored.
The operation queue on which the handler executes. By default, the main operation queue is used.
The handler to call when the current focus is updated or cannot be moved in the selected direction.
override public func addNotificationObservers()