Animating a sprite with SpriteView under iOS15

Question

Trying to animate a sprite node within SpriteKit using SwiftUI but not having much success.

Created a touchable sprite, that works. But tried a texture map, does nothing. Tried manually changing the textures, does nothing.

import SwiftUI
import SpriteKit

class GameScene: SKScene {

private var cat1: Cat!
private var cat2: Cat!
private var catAnimation: SKAction!

func createCats() {
    var textures:[SKTexture] = []
    for i in 1...4 {
        textures.append(SKTexture(imageNamed: "img\(i)"))
    }
    
    print("tex \(textures.count)")
    catAnimation = SKAction.animate(withNormalTextures: textures, timePerFrame: 1)
    
    cat1 = Cat(texture: textures.first, color: UIColor.red, size: CGSize(width: 48, height: 48))
   
    cat1.position = CGPoint(x: 64, y: 128)
    cat1.color = .magenta
    cat1.isUserInteractionEnabled = true
    cat1.delegate = self
    addChild(cat1)
    
    cat2 = Cat(texture: textures.first, color: UIColor.red, size: CGSize(width: 48, height: 48))
    
    cat2.position = CGPoint(x: 128, y: 128)
    cat2.color = .green
    cat2.isUserInteractionEnabled = true
    cat2.delegate = self
    addChild(cat2)
}

override func didMove(to view: SKView) {
    createCats()
}

}

extension GameScene: CatDelegate {

func catTouched(cat: Cat) {
    print("cat of color \(cat.color)")
    cat.run(SKAction.repeat(catAnimation, count: 4))
}

}


protocol CatDelegate {
func catTouched(cat: Cat)
}

class Cat: SKSpriteNode {
var delegate: CatDelegate!

var isEnabled = true
var sendTouchesToScene = true
var colour: SKColor = .blue
var textures:[SKTexture] = []
var count = 0

override init(texture: SKTexture!, color: UIColor, size: CGSize) {
        super.init(texture: texture, color: color, size: size)
    for i in 1...4 {
        textures.append(SKTexture(imageNamed: "img\(i)"))
    }
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent!) {
    
    guard isEnabled else { return }
    
    //send touch to scene if you need to handle further touches by the scene
    if sendTouchesToScene {
        super.touchesBegan(touches, with: event)
    }
    
    self.colorBlendFactor = 1.0
    
    //handle touches for cat
    delegate?.catTouched(cat: self)
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    //
}


}



struct ContentView: View {

var scene: SKScene {
    let scene = GameScene()
    scene.size = CGSize(width: 256, height: 256)
    scene.scaleMode = .fill
    scene.backgroundColor = .white
    return scene
}

var body: some View {
    SpriteView(scene: scene)
        .frame(width: 256, height: 256)
        .border(Color.red)
        
}
}

struct ContentView_Previews: PreviewProvider {
static var previews: some View {
    ContentView()
}
}

extension Task where Success == Never, Failure == Never {
static func sleep(seconds: Double) async throws {
    let duration = UInt64(seconds * 1000_000_000)
    try await sleep(nanoseconds: duration)
}
}