I have ARView and Experience.rcproject file that I am trying to open in my VC, but problem is my screen black. Why?

import RealityKit
import UIKit
import ARKit

class ArVC: UIViewController, ARSCNViewDelegate {
    
    lazy var sceneView: ARSCNView = {
        let sceneView = ARSCNView()
        sceneView.delegate = self
        return sceneView
    }()
    
    var arView: ARView = {
        let arView = ARView()
        let boxAnchor = try! Experience.loadBox()
        arView.scene.anchors.append(boxAnchor)
        return arView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .clear
    }
    
    func createView() {
        self.view.addSubview(sceneView)
        self.view.addSubview(self.sceneView)
        self.sceneView.snp.makeConstraints { make in
            make.centerY.centerX.equalToSuperview()
        }
        
        view.subviews.forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }
        
        self.sceneView.addSubview(self.arView)
        self.arView.snp.makeConstraints { make in
            make.centerX.centerY.equalToSuperview()
        }
    }
}

What other options are there to set ARView programmatically? Thank you.

CodePudding user response：

This test code does the trick. If you're building AR project from scratch (by choosing simple iOS App template, not ARKit template), make sure you added Privacy - Camera Usage Description and Required device capabilities (Item 0 = ARKit) in info.plist file.

import RealityKit
import UIKit

class ViewController: UIViewController {
    
    var arView: ARView = {
        let arView = ARView(frame: .zero)
        let boxAnchor = try! Experience.loadBox()
        arView.scene.anchors.append(boxAnchor)
        return arView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .red
        
        self.view.addSubview(self.arView)
            
        NSLayoutConstraint.activate([
            arView.topAnchor.constraint(equalTo: self.view.topAnchor),
            arView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor),
            arView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor),
            arView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor)
        ])
        self.view.subviews.forEach {
            $0.translatesAutoresizingMaskIntoConstraints = false
        }
    }
}

Also I've noticed you added sceneView twice.