How To Present a SKScene from a UIViewController

Question

I am creating this game in SpriteKit. At first launch, the GameViewController presents another ViewController called the MenuViewController linked with a storyboard. And in the MenuViewController there is a play button that will present a SKScene called the GameScene.

I figured out how to present the MenuViewController from the GameViewController, but I can't find a way to present the GameScene when the play button is tapped. In my code, when the button is tapped, nothing actually happens.

GameViewController:

import UIKit
import SpriteKit

class GameViewController: UIViewController {

    override func viewDidAppear(_ animated: Bool) {

        let storyBoard: UIStoryboard = UIStoryboard(name: "MenuViewController", bundle: nil)
        let vc = storyBoard.instantiateViewController(withIdentifier: "MenuViewController") as! MenuViewController
        self.present(vc, animated: true, completion: nil)

    }

}

And in the MenuViewController:

import UIKit
import SpriteKit

class MenuViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    @IBAction func playButtonTapped(_ sender: Any) {

         if let view = self.view as! SKView? {
            let scene = GameScene(size: view.bounds.size)
            scene.scaleMode = .aspectFill 
            view.presentScene(scene)
            view.ignoresSiblingOrder = true
            view.showsFPS = false
            view.showsNodeCount = false
            view.showsPhysics = false

         }
    }

}

Also, I got this warning printed into the console:

SKView: ignoreRenderSyncInLayoutSubviews is NO. Call _renderSynchronouslyForTime without handler

I don't know if this is related...

I did set the view of the MenuViewController's storyboard to be equal SKView. I can't find any way to make the GameScene appear. Nothing happens.

Thanks!

OKMIN OKMIN · Accepted Answer · 2020-02-12T04:47:42

According to Apple Devlopment Documentation, 'scene' needs to present for 'view'. Try this. :)

@IBAction func playButtonTapped(_ sender: Any) {

     if let view = self.view as? SKView {
        let scene = GameScene(size: view.bounds.size)
        scene.scaleMode = .aspectFill
        view.ignoresSiblingOrder = true
        view.showsFPS = false
        view.showsNodeCount = false
        view.showsPhysics = false

        // Add this code
        view.presentScene(scene)
     }
}

https://developer.apple.com/documentation/spritekit/skview/1519705-presentscene

How To Present a SKScene from a UIViewController

3 Answers