SpriteKit - SpriteNode never shows - swift

Question

I am attempting to learn SpriteKit. I want to add a rectangle/square to the scene in code; but the item never shows;
All I want to do is add a white square to the screen, but find that it never adds.
In a breakpoint, I notice that didMove() never seems to get called.
What am I doing wrong?
class GameScene: SKScene {
override func didMove(to view: SKView) {
let item = SKSpriteNode(color: .white, size: CGSize(width: 150, height: 200))
item.position = CGPoint(x: self.size.width/2, y: self.size.height/2)
self.addChild(item)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
}
override func update(_ currentTime: TimeInterval) {
// Called before each frame is rendered
}
}
update
I did not change the view controller generated by xcode
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
if let view = self.view as! SKView? {
// Load the SKScene from 'GameScene.sks'
if let scene = SKScene(fileNamed: "GameScene") {
// Set the scale mode to scale to fit the window
scene.scaleMode = .aspectFill
// Present the scene
view.presentScene(scene)
}
view.ignoresSiblingOrder = true
view.showsFPS = true
view.showsNodeCount = true
}
}
override var shouldAutorotate: Bool {
return true
}
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
if UIDevice.current.userInterfaceIdiom == .phone {
return .allButUpsideDown
} else {
return .all
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Release any cached data, images, etc that aren't in use.
}
override var prefersStatusBarHidden: Bool {
return true
}
}
There is no GameScene.sks, I deleted this file as I do not want to use sks files

Answer 1

If a breakpoint in didMove(to view:) is never reached, then definitely your ViewController doesn't present the scene for some reason. Can you open your ViewController's file (e.g. GameViewController.swift) and see if you have any of those lines there (or anything to that effect):
let viewSize = UIScreen.main.bounds.size
let scene = GameScene(size: viewSize)
let skView = self.view as! SKView
skView.presentScene(scene)

Answer 2

Turns out view controller was not presenting the scene and changing it to this, following code posted by #Stoyan worked and I saw my sprite showing
override func viewDidLoad() {
super.viewDidLoad()
if let view = self.view as! SKView? {
let viewSize = UIScreen.main.bounds.size
let scene = GameScene(size: viewSize)
view.ignoresSiblingOrder = true
view.showsFPS = true
view.showsNodeCount = true
view.presentScene(scene)
}