RealityKit与SceneKit能否协同使用？ARView目标检测实现方案咨询

Great questions! Let’s tackle them one by one:

Absolutely—Apple explicitly supports interoperability between these two frameworks, so you can mix and match their content depending on your needs. The most common use case (if you’re working primarily in RealityKit’s ARView) is embedding SceneKit content into a RealityKit scene using the SceneKitComponent.

Here’s a quick example of how to wrap a SceneKit node into a RealityKit entity and display it in your ARView:

// Load your existing SceneKit scene
guard let scnScene = SCNScene(named: "VintageCar.scn") else {
    print("Failed to load SceneKit scene")
    return
}
let scnRootNode = scnScene.rootNode

// Wrap the SceneKit node in a RealityKit SceneKitComponent
let scnComponent = SceneKitComponent(scnNode: scnRootNode)
let sceneKitEntity = Entity()
sceneKitEntity.components.set(scnComponent)

// Add the entity to the ARView's scene with an anchor
let horizontalAnchor = AnchorEntity(plane: .horizontal)
horizontalAnchor.addChild(sceneKitEntity)
arView.scene.addAnchor(horizontalAnchor)

You can also go the other way: convert a RealityKit entity into a SceneKit node using SCNNode(realityKitEntity:), which is useful if you need to render RealityKit content in an ARSCNView. Just keep an eye on performance—overmixing complex content from both frameworks can impact frame rates, so test thoroughly!

You’re right that most initial documentation focuses on ARSCNView, but don’t worry—object detection relies on ARKit’s core capabilities, which work seamlessly with RealityKit’s ARView. Here’s how to implement it:

Step 1: Prepare Your Reference Objects #

First, you need reference objects (.arobject files) that ARKit will use to detect real-world objects. You can create these using:

• Apple’s Object Capture tool (for high-quality scans of physical objects)
• The ARKit scanning feature in Xcode’s pre-built AR templates (for quick on-device scans)

Step 2: Configure the ARSession #

Set up your ARView’s session with ARObjectDetectionConfiguration, which tells ARKit to look for your reference objects:

let detectionConfig = ARObjectDetectionConfiguration()

// Load your reference objects from the app bundle
guard let referenceObjects = ARReferenceObject.referenceObjects(inGroupNamed: "FurnitureObjects", bundle: nil) else {
    fatalError("Failed to load reference objects—check your bundle setup!")
}
detectionConfig.detectionObjects = referenceObjects

// Start the session
arView.session.run(detectionConfig)

Step 3: Handle Detected Objects #

Listen for when ARKit detects a reference object by setting the ARSessionDelegate on your ARView, then create a RealityKit anchor to attach content to the detected object:

class ARViewController: UIViewController, ARSessionDelegate {
    @IBOutlet weak var arView: ARView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        arView.session.delegate = self
        // Run the detection configuration here (as shown above)
    }
    
    func session(_ session: ARSession, didAdd anchors: [ARAnchor]) {
        for anchor in anchors {
            // Check if this is a detected object anchor
            guard let objectAnchor = anchor as? ARObjectAnchor else { continue }
            
            // Create a RealityKit anchor tied to the detected object's position
            let detectedObjectAnchor = AnchorEntity(anchor: objectAnchor)
            
            // Add your custom content (e.g., a 3D label or interactive model)
            if let infoCard = try? Entity.load(named: "ObjectInfoCard") {
                detectedObjectAnchor.addChild(infoCard)
            }
            
            // Add the anchor to the ARView's scene
            arView.scene.addAnchor(detectedObjectAnchor)
        }
    }
}

Key Notes #

• RealityKit’s AnchorEntity will automatically track the ARKit anchor’s position and orientation, so you don’t need to manually update its position.
• For better detection accuracy, ensure the real-world object matches the reference object’s size and orientation, and that the environment has good lighting and distinct surface features.

内容的提问来源于stack exchange，提问作者Kyzyl Monteiro