To practice your SceneKit knowledge, create a new project and instead of choosing the Game template, pick the Single View Application template. Of course, you are free to explore the default project Xcode creates for you when you choose the Game template with SceneKit, but it's not terribly useful for the AR gallery.
After creating your project, open the main storyboard and look for a SceneKit view. Drag this view into the view controller. You should notice that the view you just added to the view controller has replaced the default view entirely. Because of this, the view property on ViewController will not be a regular UIView, it will be an instance of SCNView instead. This is the view that will be used to ...
