ARKit and SCNText

gistfile1.txt

 let text = SCNText(string: item.label, extrusionDepth: 5.0)
            text.firstMaterial?.diffuse.contents = UIColor.orange
            text.firstMaterial?.specular.contents = UIColor.orange
            text.font = UIFont(name: "Optima", size: 44)
            text.containerFrame = CGRect(x: 0, y: 0, width: 100, height: 44)
            
            let textNode = SCNNode(geometry: text)
            textNode.position = SCNVector3(-0.2 + x, -0.9 + delta, -1)
            
            x += 0.12
            
           // self.node.addChildNode(boxNode)
            self.node.addChildNode(textNode)  // this never displays the text node