To implement image tracking, you will set up an ARSession that uses ARWorldTrackingConfiguration to detect images and track a user's movement through the environment. When one of the images you have prepared is discovered in the scene, an SCNPlane will be added above the picture with a short description of the picture itself.
Because ARKit uses the camera, your app must explicitly provide a reason for accessing the camera, so the user understands why your app needs permission to use their camera. Add the NSCameraUsageDescription key to the Info.plist file and add a short text about why the gallery needs access to the camera.
If you open ViewController.swift, you will find a property called artDescriptions ...
