Receiving Xcode notification on Reality Composer animation end

Question

I have the following Reality Composer project that loads properly. As you can see, when the animation completes, it should notify with the keyword "attackComplete".

How do I get this notification?

import RealityKit
import ARKit

class ViewController: UIViewController, ARSessionDelegate {
    
    @IBOutlet var arView: ARView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let boxAnchor = try! Experience.loadOrcAttack()
        arView.session.delegate = self
        arView.scene.anchors.append(boxAnchor)
        print("done")
    }
    
    func session(_ session: ARSession, didUpdate anchors: [ARAnchor]) {
        print(anchors)
    }
}

Answer 1

With Reality Composer's notifications you can implement two scenarios:

Action listener

This is your case and it's easy to implement using

public var onAction: ((RealityKit.Entity?) -> Swift.Void)?.

import UIKit
import RealityKit

class ViewController: UIViewController {
    
    @IBOutlet var arView: ARView!
    let scene = try! Experience.loadScene()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        arView.scene.anchors.append(scene)
        
        scene.actions.attackCompleted.onAction = notificationID   // listener
    }
 
    fileprivate func notificationID(_ entity: Entity?) {        
         print(scene.actions.attackCompleted.identifier)
    }
}

Here is one more example of how .onAction completion handler can be used.

Trigger for action

When you need to notify Reality Composer's scene to play an action use the following scenario:

import UIKit
import RealityKit

class ViewController: UIViewController {
    
    @IBOutlet var arView: ARView!
    let scene = try! Experience.loadScene()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        arView.scene.anchors.append(scene)
    }
    
    @IBAction func press(_ sender: UIButton) {
        scene.notifications.spinner.post()            // trigger for action
    }
}

or use a subscript for [NAME.NotificationTrigger]:

@IBAction func press(_ sender: NSButton) {
    scene.notifications.allNotifications[0].post()
}

Here's one more example of how .post() instance method can be used.

P. S.

If you need more info, read this post.