Creating an AR App with ARKit

import ARKit

class ViewController: UIViewController {
    @IBOutlet var sceneView: ARSCNView!

    override func viewDidLoad() {
        super.viewDidLoad()
        let configuration = ARWorldTrackingConfiguration()
        sceneView.session.run(configuration)
        addCube()
    }

    func addCube() {
        let cube = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
        let cubeNode = SCNNode(geometry: cube)
        cubeNode.position = SCNVector3(0, 0, -0.5)
        sceneView.scene.rootNode.addChildNode(cubeNode)
    }
}