Returns a Boolean indicating whether the system is allowed to hide the visual indicator for returning to the Home screen.
- iOS 11.0+
true if your view controller lets the system determine when to hide the indicator, or
false if you want the indicator shown at all times. The default implementation of this method returns
Override this method to signal your preference for displaying the visual indicator. The system takes your preference into account, but returning
true is no guarantee that the indicator will be hidden.