Add 3d node to sceneView following wwdc code, but the 3d node rotates 90 degrees

问题

I use iPad to develop an AR app. I follow the wwdc code to add my first node on the sceneView. If the iPad is landscape, I can get the right result, but if the iPad is Portrait, it rotates 90 degrees. Anybody can help me, thanks?

        guard let frame = sceneView.session.currentFrame else {
            return
        }
        if let scnStr = noti.object as? String {
            // Create a new scene
            let scene = SCNScene(named: "art.scnassets/\(scnStr)")!
            let emojiNode = SCNNode()
            for node in scene.rootNode.childNodes  {
               emojiNode.addChildNode(node)
            }
            sceneView.scene.rootNode.addChildNode(emojiNode)
            var translation = matrix_identity_float4x4
            translation.columns.3.z = -1
            emojiNode.simdTransform = matrix_multiply(frame.camera.transform, translation)
        }

来源：https://stackoverflow.com/questions/60072627/add-3d-node-to-sceneview-following-wwdc-code-but-the-3d-node-rotates-90-degrees