let randomNumber = arc4random_uniform(2) let x: CGFloat = randomNumber == 0 ? 1 : -1 enemy.position = CGPoint(x: (CGFloat(arc4random_uniform(UInt32(UIScreen.main.bounds.width))) * x), y: UIScreen.main.bounds.height) here is my code for enemy spawn, it works but some of my enemies are spawning outside of my screen. What can i change to make them all spawn inside the border

How can i change my objects gravity without having my player fall with it. I added physicsWorld.gravity = CGVector(dx: 0, dy: 0) on my players movement and affectedByGravity on both my object and player. If I change dy to -9.8, my object falls but along with my player

Im getting a overridden error for my player and enemy. I made a enemy file and added this code into my gamescene. My enemy only spawns in if i delete my player movement code func spawnEnemy() {       let enemy = Enemy(image: SKSpriteNode(imageNamed: "enemy"))   self.addChild(enemy)   }       override func update(_ currentTime: TimeInterval) {     spawnEnemy()   }

I have the bare bones of an AUv3 plug in. I have used UIHostingController to allow me to add a SwiftUI view. Then from the SwiftUI I have added a SprikeKit scene which I want to use to start building an interface for the AU. It's a very basic GameScene for now. If I run one instance of it in Logic then it's OK. If I add another instance it crashes with a Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) error. This seems to be down to how I declare a SpriteNode variable. If I declare it within the GameScene as a "let" then it's fine. If I declare it outside the class - (see hashed code) then it will crash with two instances. It would be useful to me later on for this to be a public variable as I want to perform functions on it outside of the class. Is there a better way to declare the SpriteNode variable to make it stable? import SpriteKit //public var ball = SKShapeNode(circleOfRadius: 30) var ball = SKShapeNode(circleOfRadius: 30) class GameScene: SKScene {         let ball = SKShapeNode(circleOfRadius: 30)     override func didMove(to view: SKView) {            //physicsBody = SKPhysicsBody(edgeLoopFrom: frame)         ball.position = CGPoint(x: 200, y: 200)         ball.fillColor = .lightGray         self.addChild(ball)          }

I deleted the grid on gamescene.sks and i dont know how to get it back. Now my game wont run

I am trying to use an EnvironmentObject in an init. I am aware that this is not possible because it hasn't been initialised yet. But what is the solution? I have tried loading the scene.gameCenterManger in .onAppear but that doesn't seem to work. I want to use @State for my gamescene variable, because SKScene will reset itself when the view does a refresh. struct GameSceneView: View {     @EnvironmentObject var gameCenterManager:GameCenterManager @State var scene = GameScene()     init() {   scene.size = CGSize(width: 1000, height: 1800)       scene.scaleMode = .aspectFill // doing it as below will throw an error. //scene.gameCenterManager = gameCenterManager     }     var body: some View {         SpriteView(scene: scene )             .environmentObject(gameCenterManager)             .frame(width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)             .ignoresSafeArea()             .overlay(ImageOverlay(), alignment: .bottomTrailing)            .onAppear{ scene.gameCenterManager = gameCenterManager  }     } }

When adding a particle emitter in SpriteKit, I want each particle to stay in the same spot instead of moving with the node the particle is coming off of. My node moves, and I want the particle to flow off of the back and float up (as a trail). Not to be stuck dragged behind the node. Any help? Im using swift in Xcode.

I have an SKSpriteNode with an SKAction being run on it: theGem!.run(premAction, completion: {theGem!.run(repeatAction)}) Can't seem to find out the proper steps to run another action, such as: theGem.run(endsequence, completion: {theGem.removeAllActions(); theGem.run(stopAction)}) Should I stop the previous action first? Is there a way to turn the repeat part off so that the first SKAction ends smoothly?