SwiftUI - Add SceneKit Scene to MacOS project - xcode

Question

Goal: Add SceneKit Scene to SwiftUI MacOS project (not Catalyst) using UIViewRepresentable
What I did:
Following code works fine when target is SwiftUI iOS.
But when target is MacOS, I get error bellow:
import SwiftUI
import SceneKit
struct ScenekitView : UIViewRepresentable {
let scene = SCNScene(named: "art.scnassets/ship.scn")!
func makeUIView(context: Context) -> SCNView {
// create and add a camera to the scene
let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
scene.rootNode.addChildNode(cameraNode)
// place the camera
cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)
// create and add a light to the scene
let lightNode = SCNNode()
lightNode.light = SCNLight()
lightNode.light!.type = .omni
lightNode.position = SCNVector3(x: 0, y: 10, z: 10)
scene.rootNode.addChildNode(lightNode)
// create and add an ambient light to the scene
let ambientLightNode = SCNNode()
ambientLightNode.light = SCNLight()
ambientLightNode.light!.type = .ambient
ambientLightNode.light!.color = UIColor.darkGray
scene.rootNode.addChildNode(ambientLightNode)
// retrieve the ship node
let ship = scene.rootNode.childNode(withName: "ship", recursively: true)!
// animate the 3d object
ship.runAction(SCNAction.repeatForever(SCNAction.rotateBy(x: 0, y: 2, z: 0, duration: 1)))
// retrieve the SCNView
let scnView = SCNView()
return scnView
}
func updateUIView(_ scnView: SCNView, context: Context) {
scnView.scene = scene
// allows the user to manipulate the camera
scnView.allowsCameraControl = true
// show statistics such as fps and timing information
scnView.showsStatistics = true
// configure the view
scnView.backgroundColor = UIColor.black
}
}
#if DEBUG
struct ScenekitView_Previews : PreviewProvider {
static var previews: some View {
ScenekitView()
}
}
#endif
Really appreciate if anyone here can help!
Cheers to all!

Answer 1

Not much to change - just instead of UIViewRepresentable conform to NSViewRepresentable, and similar replacements from AppKit instead of UIKit
Here it is (tested with Xcode 11.2):
import SwiftUI
import SceneKit
import AppKit
struct ScenekitView : NSViewRepresentable {
let scene = SCNScene(named: "art.scnassets/ship.scn")!
func makeNSView(context: NSViewRepresentableContext<ScenekitView>) -> SCNView {
// create and add a camera to the scene
let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
scene.rootNode.addChildNode(cameraNode)
// place the camera
cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)
// create and add a light to the scene
let lightNode = SCNNode()
lightNode.light = SCNLight()
lightNode.light!.type = .omni
lightNode.position = SCNVector3(x: 0, y: 10, z: 10)
scene.rootNode.addChildNode(lightNode)
// create and add an ambient light to the scene
let ambientLightNode = SCNNode()
ambientLightNode.light = SCNLight()
ambientLightNode.light!.type = .ambient
ambientLightNode.light!.color = NSColor.darkGray
scene.rootNode.addChildNode(ambientLightNode)
// retrieve the ship node
let ship = scene.rootNode.childNode(withName: "ship", recursively: true)!
// animate the 3d object
ship.runAction(SCNAction.repeatForever(SCNAction.rotateBy(x: 0, y: 2, z: 0, duration: 1)))
// retrieve the SCNView
let scnView = SCNView()
return scnView
}
func updateNSView(_ scnView: SCNView, context: Context) {
scnView.scene = scene
// allows the user to manipulate the camera
scnView.allowsCameraControl = true
// show statistics such as fps and timing information
scnView.showsStatistics = true
// configure the view
scnView.backgroundColor = NSColor.black
}
}