The set-up is simple:
User points their phone somewhere to find a plane. Plane for whichever reason, does not appear after a predetermined amount of time. Display a modal instructing the user to find a more suitable environment.
The solution seemed to be straightforward, too. Just start a timer, and if an automatic hit test is never registered for a predetermined amount of time, display the modal. This, however, never occurs.
Can you suggest an alternate method, or give me a pointer why my current approach doesn't work?