Black screen on ARView - swift

Question

I am trying to programmatically instantiate an ARView. This is my code for the View Controller
import Foundation
import UIKit
import RealityKit
class ARViewController: UIViewController {
var arView: ARView = {
let arview = ARView()
arview.cameraMode = .ar
arview.automaticallyConfigureSession = true
arview.translatesAutoresizingMaskIntoConstraints = false
return arview
}()
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
setupUIConstraints()
}
func setupUI() {
view.addSubview(arView)
// Load the "Cupcake" scene from the "Experience" Reality File
let boxAnchor = try! Experience.loadBox()
// Add the box anchor to the scene
arView.scene.anchors.append(boxAnchor)
}
func setupUIConstraints() {
view.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
view.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
view.widthAnchor.constraint(equalTo: view.widthAnchor).isActive = true
view.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true
}
}
The app will appropriately ask me for Camera permissions, but even after accepting, the 'view' is just a black screen. I am on an iPhone XS, and have imported arkit into my info.plist. Any help would be much appreciated.

Answer 1

In setupUIConstraints you're setting the constraints for the ARViewController.view to its own constraints, rather than the ARView.
Change to the ARView and you should be good!