Can't play USDZ animation with RealityKit-CodePudding

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.

CodePudding user response：

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)