In the sample project, there is an ARParentViewController which contains on OverlayViewController and an ARViewController.
I've added a ViewController to a storyboard in XCode, and I've assigned the ARParentViewController to that class.
But I would like to add UI to the AR view. For instance, in the storyboard, I create a button. I then connect it (IBOutlet) to the ARParentViewController class, and then add it as a sub-view to the main view of the controller. But that doesn't work...
So, I'm just wondering, what is the proper way to superimpose UI over top of the AR view?