.swift

 @objc func resolveAnchor() {
    
   if let cloudAnchor = try? self.gSession.resolveCloudAnchor(withIdentifier: self.cloudIdentifier) {
                
                let box = SCNBox(width: 0.3, height: 0.3, length: 0.3, chamferRadius: 0)
                let material = SCNMaterial()
                material.diffuse.contents = UIColor(fromHexString: hex)
                box.materials = [material]
                
                let node = SCNNode(geometry: box)
                node.position = SCNVector3(cloudAnchor.transform.columns.3.x, cloudAnchor.transform.columns.3.y, cloudAnchor.transform.columns.3.z)
                self.sceneView.scene.rootNode.addChildNode(node)
                
            }
    }