Deleting the Gamescene.sks file raises CPU to 25% on device - swift

Question

I just created a brand new Xcode Game Project. I deleted the Gamescene.sks file. Ran it and the cpu instantly to 25-30%. I made another Xcode project just to see if I could replicate it. Ran it before deleting the file and cpu was basically 0%, but sure enough when I deleted the file and ran it again, the cpu jumped up to the same high numbers. My goal is to subclass skscene and use that without the Gamescene.sks file. Can someone explain why this happens?

Answer 1

I was able to replicate this behavior just deleting the .sks file.
The problem is GameViewController is looking for that file at first loading time, as you can see here:
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
}
}
So you need to initialize it another way. Just as an example, you could init an empty scene like this:
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
if let view = self.view as! SKView? {
// Load the SKScene from 'GameScene.sks'
let scene = SKScene(size: CGSize(width: 1000, height: 1000))
scene.scaleMode = .aspectFill
view.presentScene(scene)
view.ignoresSiblingOrder = true
view.showsFPS = true
view.showsNodeCount = true
}
}
and you'll see 1% of CPU load.