Can't play USDZ animation with RealityKit

Question

I've followed the answer in this SO question regarding playing the animation of a USDZ file with the following code:

@IBOutlet var arView: ARView!
override func viewDidLoad() {
 super.viewDidLoad()
 // Do any additional setup after loading the view.
 
 arView = ARView(frame: self.view.frame)
 self.view.addSubview(arView)
 arView.cameraMode = .nonAR
 let newAnchor = AnchorEntity(world: .zero)
 let newEnt = try! Entity.load(named: "Vintage Toy Robot")
 newAnchor.addChild(newEnt)
 arView.scene.addAnchor(newAnchor)
 
 print(newEnt.availableAnimations)
 
 for anim in newEnt.availableAnimations {
 newEnt.playAnimation(anim.repeat(duration: .infinity), 
 transitionDuration: 1.25, startsPaused: false)
 }
}

However, the animation does not play, the USDZ file is just static.

Answer 1

Download robot model with animation from AR Quick Look page. Your code is working. Do not use not-animated robot from Reality Composer library.

let entity = try! Entity.load(named: "toy_robot_vintage.usdz")

And delete these two lines of code (you've got 2 ARViews, it's blocking the animation):

arView = ARView(frame: self.view.frame)
self.view.addSubview(arView)

• narner: Oh; yeah that's the one I am using - in the Xcode viewer I can play/pause the model just fine