SpriteKit world wrong positioning

Question

I'm trying to make my first game using SpriteKit & Swift. I think I understood the concept of World SKNode, but I can't make it work properly.

I add world:SKNode as a child to the GameScene. Then I add 9 child SKSpriteNodes (400px X 400px from starting from 200px X 200px point, because spritesNodes are centered). And they position perfectly, BUT I can't figure out how to get bounds of my world SKNode.

For example, how can I show left down corner of my world?

import SpriteKit

class GameScene: SKScene {
    let cityPartSide:Int = 400
    let startCoord:Int = 200

    var world:SKNode = SKNode()

    override func didMoveToView(view: SKView) {

        //self.world = SKNode()
        self.world.name = "world"
        self.addChild(self.world)
        let map:[[UInt8]] = [[16, 16, 16],
                             [16, 16, 16],
                             [16, 16, 16]]
        drawMap(world, map: map)

    }
    func drawMap(world:SKNode, map:[[UInt8]]) {
        let lineSize:Int = map[0].count
        var lineCounter = map.count
        while lineCounter > 0 {
            lineCounter -= 1
            var elemCounter = 0
            while elemCounter < lineSize {
                var sprite:SKSpriteNode = SKSpriteNode()
                let currentPartNumb = map[lineCounter][elemCounter]
                if currentPartNumb == 0 {
                    elemCounter += 1
                    continue
                } else {
                    sprite = SKSpriteNode(imageNamed: "cell")
                }
                //CHOOSE IMAGE
                sprite.position = CGPoint(x: startCoord + elemCounter * cityPartSide, y: startCoord + ((lineSize-1)-lineCounter)*cityPartSide)
                world.addChild(sprite)
                elemCounter += 1
            }
        }
    }
    override func update(currentTime: CFTimeInterval) {
        /* Called before each frame is rendered */
    }
}

But what I get by running this code is that vertically it is positioned perfectly, but left side of the world is somewhere out of the screen.

Looks to me like you are not handling the scalingFactors correctly, how are you creating the scene itself? What scaleMode are you using? — Knight0fDragon, Apr 07 '16 at 13:41

score 1 · Answer 1 · answered Apr 13 '16 at 19:05

Oh, that was quite easy. I needed to add this

scene.size = self.view.frame.size

in GameViewController.swift's viewDidLoad like this

class GameViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        if let scene = GameScene(fileNamed:"GameScene") {
            // Configure the view.
            let skView = self.view as! SKView
            skView.showsFPS = true
            skView.showsNodeCount = true

            /* Sprite Kit applies additional optimizations to improve rendering performance */
            skView.ignoresSiblingOrder = true

            /* Set the scale mode to scale to fit the window */
            scene.scaleMode = .AspectFill
            scene.size = self.view.frame.size    //<---HERE
            skView.presentScene(scene)
        }
    }

    //...etc.

SpriteKit world wrong positioning

1 Answers1