My project involves no camera passthrough and relies heavily on sprites, but I've been discouraged from using the aging (and possibly dying) SpriteKit or SceneKit as my rendering engine by Apple engineers (here) so I'm exploring other options.
Is it possible to display 2D sprites fluidly using this framework in a non-AR context? Is it possible to create, say, a 2D platformer using just RealityKit?
I'm constructing a Swift Playground with UIKit that contains an SKScene. After creating the code I'm planning to use within an Xcode project, I tried to adapt it into my Playground.
I encountered an issue while running the Playground - when a new SKSpriteNode is added to the Scene, the new and existing nodes jitter, freeze, and lag for a split-second, the FPS counter drops to around 49fps, then returns to smooth 60fps. No errors or warnings are spat, and the console is completely empty.
The scene in the project didn't have this issue, and I can't recreate it on another project - even when I directly copy-paste the code from the Playground to the project.
I've seen other posts with this question - and made a few myself elsewhere - and there's been no responses. I desperately need help for this as nothing I've tried is working and the deadline is in a few days!
Thanks!
The code that is in effect for this SKScene is below.
class SimulatorController: UIViewController {
override func loadView() {
let view = SKView()
let scene = GameScene(size: view.bounds.size)
view.showsFPS = true
view.showsNodeCount = true
view.ignoresSiblingOrder = true
scene.scaleMode = .resizeFill
view.presentScene(scene)
self.view = view
}
}
class GameScene: SKScene {
override func didMove(to view: SKView) {
run(SKAction.repeatForever(SKAction.sequence([
SKAction.run(addNeutron),
SKAction.wait(forDuration: 1)
])
))
}
func random() -> CGFloat {
return CGFloat(Float(arc4random()) / 0xFFFFFFFF)
}
func random(min: CGFloat, max: CGFloat) -> CGFloat {
return random() * (max - min) + min
}
func addNeutron() {
let neutron = SKSpriteNode(imageNamed: "neutron.heic")
neutron.size = CGSize(width: 20, height: 20)
neutron.physicsBody = SKPhysicsBody(rectangleOf: neutron.size)
neutron.physicsBody?.isDynamic = true
let actualX = random(min: 0, max: size.width)
let actualY = random(min: 0, max: size.height)
neutron.position = CGPoint(x: actualX, y: actualY)
addChild(neutron)
let actualDuration = random(min: CGFloat(2.0), max: CGFloat(4.0))
let actualX2 = random(min: 0, max: size.width)
let actualY2 = random(min: 0, max: size.height)
let actionMove = SKAction.move(to: CGPoint(x: actualX2, y: actualY2), duration: TimeInterval(actualDuration))
let actionMoveDone = SKAction.removeFromParent()
neutron.run(SKAction.sequence([actionMove, actionMoveDone]))
}
}
Post not yet marked as solved
Hello! I'm using SpriteKit for my application, and when I add an SKSpriteNode into the scene it lags and the FPS drops from 60 to 45. To make sure this isn't a code issue, I tested this in an app instead of a playground and it worked fine. Will I get penalized for poor performance or is there a way to solve this issue?Thank you 🙂
Hi, I am Sanjiv, a Highschool student who is trying to participate in wwdc student scholarship , and I have a doubt in swift I have two bool variables, one global and one local. Once the value of the global variable changes I want the value of the local variable also to change. I want this for navigation. I have a gameScene and once the level is completed it needs to go to the next navigation view. I have tried multiple methods but none worked. Any help will be appreciated.
Post not yet marked as solved
Hello, I am building game with SpriteKit. 2 or 3 days ago my code worked perfectly then some project files paths changed in my computer. So now my code is running on preview but it's not running on simulator. I got error message like this Thread 1: signal SIGABRT
2022-04-17 23:48:25.927505+0300 MultiplayerGame[58416:1308997] fopen failed for data file: errno = 2 (No such file or directory)
2022-04-17 23:48:25.927569+0300 MultiplayerGame[58416:1308997] Errors found! Invalidating cache...
2022-04-17 23:48:26.015933+0300 MultiplayerGame[58416:1309280] Execution of the command buffer was aborted due to an error during execution. The operation couldn’t be completed. (MTLCommandBufferErrorDomain error 9.)
2022-04-17 23:48:26.016392+0300 MultiplayerGame[58416:1309280] Execution of the command buffer was aborted due to an error during execution. The operation couldn’t be completed. (MTLCommandBufferErrorDomain error 9.)
XPC_ERROR_CONNECTION_INTERRUPTED
dyld4 config: DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/mkg/Library/Developer/Xcode/DerivedData/MultiplayerGame-ghupaqvlksldiogzatxbetsvshfx/Build/Products/Debug-iphonesimulator:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMainThreadChecker.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMTLCapture.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/Developer/Library/PrivateFrameworks/DTDDISupport.framework/libViewDebuggerSupport.dylib DYLD_FRAMEWORK_PATH=/Users/mkg/Library/Developer/Xcode/DerivedData/MultiplayerGame-ghupaqvlksldiogzatxbetsvshfx/Build/Products/Debug-iphonesimulator:/Users/mkg/Library/Developer/Xcode/DerivedData/MultiplayerGame-ghupaqvlksldiogzatxbetsvshfx/Build/Products/Debug-iphonesimulator/PackageFrameworks
CoreSimulator 802.6 - Device: iPhone 12 Pro Max (50569CD6-26AA-45EF-BE07-3B5F9702915E) - Runtime: iOS 15.4 (19E240) - DeviceType: iPhone 12 Pro Max
(lldb)
Post not yet marked as solved
Hi, I just wanted to display a SpriteKit Scene in a SCNPlane. So I set the the SCNMaterial contents to my SKScene, but instead of getting the scene I'm getting a grey plane. This is my code by the way:
var mainScene: SKScene {
let scene = Game()
scene.size = CGSize(width: 1024, height: 1024)
scene.scaleMode = .resizeFill
scene.backgroundColor = .purple
scene.view?.backgroundColor = .purple
scene.view?.allowsTransparency = false
return scene
}
func initMainScene() -> SceneView {
mainScene.view?.isPaused = false
let scene = SCNScene()
let mainSceneMaterial = SCNMaterial()
mainSceneMaterial.normal.contents = mainScene
mainSceneMaterial.isDoubleSided = true
let planeGeometry = SCNPlane(width: 1, height: 1)
planeGeometry.materials = [mainSceneMaterial]
let plane: SCNNode = SCNNode(geometry: planeGeometry)
let camera: SCNNode = SCNNode()
camera.name = "Camera"
camera.camera = SCNCamera()
camera.position = SCNVector3(x: 0.0, y: 0.0, z: 4.0)
let light: SCNNode = SCNNode()
light.light = SCNLight()
light.light!.type = .omni
light.position = SCNVector3(x: 1.5, y: 1.5, z: 1.5)
scene.rootNode.addChildNode(camera)
scene.rootNode.addChildNode(light)
scene.rootNode.addChildNode(plane)
return SceneView(
scene: scene,
pointOfView: scene.rootNode.childNode(withName: "Camera", recursively: false),
options: []
)
}
Here is the screenshot:
Also, my SpriteKit scene has touchesBegan and touchesMoved functions implemented, will those events still work if I embed the scene in the SCNMaterial?
Thanks very much 🙏
Post not yet marked as solved
Would it be possible to work with thousands of physical bodies in SpriteKit?
Hi, I just wanted to add a 3D perspective to my SpriteKit Scene, so I wondered if I render the SpriteKit Scene as a material of SCNGeometry is possible. If not, is there another way to give a 3D perspective to a SpriteKit Scene.
Thanks very much 🙏
Post not yet marked as solved
Working with a student who wants to build a game in SpriteKit as a Mac app, and I was wondering if there are any good tutorials out there for this?
Secondary, is there a better way to do key controls for a macOS games in Swift? Using the KeyDown function with the key code has been more of an annoying process than I would like. Is there any way of simply doing
if keyPressed == "D" {...}?
Post not yet marked as solved
//
// ContentView.swift
// TestSprite1
//
// Created by Alireza | Datance on 4/14/22.
//
import SwiftUI
import SpriteKit
class GameScene: SKScene {
override func didMove(to view: SKView) {
physicsBody = SKPhysicsBody(edgeLoopFrom: frame)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
//with this we would only process single touch
// good question how to process multi touch
guard let touch = touches.first else { return }
let location = touch.location(in: self)
let box = SKSpriteNode(color: SKColor.red, size: CGSize(width: 50, height: 50))
box.position = location
box.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 50, height: 50))
addChild(box)
}
}
struct ContentView: View {
var scene: SKScene {
let scene = GameScene()
scene.size = CGSize(width: 300, height: 400)
scene.scaleMode = .fill
return scene
}
func initScene () {
// why doesn't it work
scene.removeAllActions()
scene.removeAllChildren()
}
var body: some View {
VStack {
Text("Hello, world!")
.padding()
Button("Reset") {
initScene()
}
SpriteView(scene: scene)
.frame(width: 300, height: 400)
.ignoresSafeArea()
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView( )
}
}
Post not yet marked as solved
I'm new to iOS. What would be the right toolkit to create something like a swarm animation with thousands of objects on the screen moving at high speed?
Post not yet marked as solved
I have a SpriteKit scene using UITouch to drag and drop. That works. I have also an SKCameranode and a pinchGesture so you can pinch to zoom in and out of the scene. That works too. Lastly, I set up a panGesture so that you can pan the scene when it is zoomed in. That also works, but it conflicts with the drag and drop. The drag and drop works when the scene first loads, but if you zoom in on the scene, you can no longer drag and drop because it just tries to pan, and even if you zoom back out to normal size, the drag and drop function remains messed up and will only partially move.
I know there are instructions on how to allow simultaneous gestures or how to prefer one gesture over another, but only UIGestureRecognizer is mentioned in Apple's explanation of those. I didn't see anything about UITouch. Is there a way to make touches using UITouch and UIGestureRecognizers not conflict with each other?
Post not yet marked as solved
I am using xcode 13.3 beta 3 to make a game in spritekit using swift. The game is working pretty good and i am very happy with it so far. There is a problem i am trying to figure out.
The game is a block type game where you drag a block into the game area from a holding area and drop it in an open spot.
When you first touch and hold the block or touch and move the block, a method moves the block a certain number of points above the touch area Y axis using SKAction.moveby. The block x axis matches the touch area. Then you move the block to an open are and drop it.
If you do this very slow, there is no problem. But if you try to do it fast, you can see it do the SKAction.moveby first and complete, then the block quickly moves from where it finished the moveby animation to where you current touch position is it. This makes it feel very jerky and unnatural.
Is there a way to make the block follow your fingers position AND animate using moveby at the same time?
I feel that the problem is with the skaction.moveby because if you move your finger fast enough, you can be way above where the animation would normally finish and thats why you see the block jump to the touch.
I wonder if there is a way to use the update() method to somehow change the blocks position without using moveby or move to.
Thank you for any help you can provide me. I can also you show you my touchesBegin, moved and ended methods if that will help.
Post not yet marked as solved
-[SKLabelNode _isEligibleForFocus]: unrecognized selector sent to instance 0x1164f040
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)
Post not yet marked as solved
How can I develop Children interactive Book for iPad with SwiftUI?
Post not yet marked as solved
I’m currently working on a matching game and when the user touches the nodes (Fruit match cards) I want them to display different images when a user clicks the nodes (Fruit match cards).
This is my current code:
import Foundation
import SpriteKit
class EasyScreen: SKScene {
override func didMove(to view: SKView) {
var background = SKSpriteNode(imageNamed: "Easy Screen Background")
let timerText = SKLabelNode(fontNamed: "Arial")
timerText.fontSize = 40
timerText.fontColor = SKColor.white
timerText.position = CGPoint(x: 20, y: 400)
timerText.zPosition = 1
var counter:Int = 120
timerText.run(SKAction.repeatForever(SKAction.sequence([SKAction.run {
counter-=1
timerText.text = " Time: (counter)"
print("(counter)")
if counter <= 0{
let newScene = TryAgainScreen(fileNamed: "Try Again Screen")
newScene?.scaleMode = .aspectFill
self.view?.presentScene(newScene)
}
},SKAction.wait(forDuration: 1)])))
background.position = CGPoint(x: 0, y: 0)
background.size.width = self.size.width
background.size.height = self.size.height
background.anchorPoint = CGPoint(x: 0.5,y: 0.5)
let matchCardOne = SKSpriteNode(imageNamed: "Fruit Match Card")
let matchCardTwo = SKSpriteNode(imageNamed: "Fruit Match Card")
let matchCardThree = SKSpriteNode(imageNamed: "Fruit Match Card")
let matchCardFour = SKSpriteNode(imageNamed: "Fruit Match Card")
matchCardOne.name = "FruitMatchCard1"
matchCardTwo.name = "FruitMatchCard2"
matchCardThree.name = "FruitMatchCard3"
matchCardFour.name = "FruitMatchCard4"
matchCardOne.size = CGSize(width: 150, height: 300)
matchCardTwo.size = CGSize(width: 150, height: 300)
matchCardThree.size = CGSize(width: 150, height: 300)
matchCardFour.size = CGSize(width: 150, height: 300)
matchCardOne.zPosition = 1
matchCardTwo.zPosition = 1
matchCardThree.zPosition = 1
matchCardFour.zPosition = 1
matchCardOne.anchorPoint = CGPoint(x: 0.5, y: 0.5)
matchCardTwo.anchorPoint = CGPoint(x: 0.5, y: 0.5)
matchCardThree.anchorPoint = CGPoint(x: 0.5, y: 0.5)
matchCardFour.anchorPoint = CGPoint(x: 0.5, y: 0.5)
matchCardOne.position = CGPoint(x: -125, y: 60)
matchCardTwo.position = CGPoint(x: -125, y: -260)
matchCardThree.position = CGPoint(x: 70, y: 60)
matchCardFour.position = CGPoint(x: 70 , y: -260)
addChild(background)
addChild(matchCardOne)
addChild(matchCardTwo)
addChild(matchCardThree)
addChild(matchCardFour)
addChild(timerText)
}
override func touchesBegan(_ touches: Set, with event: UIEvent?) {
self.view?.isMultipleTouchEnabled = false
let touch = touches.first
let positionInScene = touch!.location(in: self)
let touchedCardOneNode = self.atPoint(positionInScene)
if let name = touchedCardOneNode.name {
if name == "FruitMatchCard1" {
let newTexture = SKTexture(imageNamed: "Apple")
FruitMatchCard1.init(texture: newTexture)
}
}
let touchTwo = touches.first
let positionInSceneTwo = touch!.location(in: self)
let touchedCardTwoNode =
self.atPoint(positionInScene)
if let name = touchedCardTwoNode.name {
if name == "FruitMatchCard2" {
FruitMatchCard2.init(imageNamed: "Banana")
}
}
let touchThree = touches.first
let positionInSceneThree = touch!.location(in: self)
let touchedCardThreeNode = self.atPoint(positionInScene)
if let name = touchedCardThreeNode.name {
if name == "FruitMatchCard3" {
FruitMatchCard3.init(imageNamed: "Apple")
}
}
let touchFour = touches.first
let positionInSceneFour = touch!.location(in: self)
let touchedCardFourNode = self.atPoint(positionInScene)
if let name = touchedCardFourNode.name {
if name == "FruitMatchCard4" {
FruitMatchCard4.init(imageNamed: "Banana")
}
}
}
override func touchesEnded(_ touches: Set, with event: UIEvent?) {
}
I’m trying to change the textures of the nodes in this part of the code. Inside the “if name == “FruitMatchCard” { } “ part of the code. However, when I launch the Xcode simulator the node’s textures aren't changing.
Any advice on how I can do this? Thanks!
Post not yet marked as solved
We noticed when using async await with SpriteKit run function.
Self is retained until run action is completed which can cause memory leak.
Task {
try? await Task.sleep(nanoseconds: 2 * NSEC_PER_SEC)
await controller.startIntro()
print("intro done")
}
If you deallocate controller, memory won't be released until await is not completed.
calling:
scene.removeAllActions()
cause memory leak.
Here is project reproducing steps with possible workarounds:
https://github.com/maradic/SpriteKitConcurrencyBug
Is this SpriteKit bug or am I doing something wrong?
Hey everyone,In one of my apps I've been working on where SKShapeNodes fall from the top to the bottom via gravity, if the player recieves a notification in iOS 9 (such as a text message), the game temporarily freezes for around 1 second and then resumes but the nodes have jumped ahead, as if the nodes are still falling but failing to display for that second. Has anyone else come across this? Is there a solution or is it just best to hold out hope for iOS 10? Unfortunately this issue makes the game near unplayable 😟Cheers
Post not yet marked as solved
Im learning to use spritekit, first-project kind of newbie, and on various tutorials I've seen that there is a tab on the right column, on the bottom, with a menu that helps import visual assets quickly into a gamescene.
Upon creating my first project I can't seem to find this tab nor a way to add it to my project; under the "Custom shader uniforms" my right-most column seems empty, unlike what I've seen on tutorials. Since this 'tab' doesn't seem to have a title I'm unsure of what I'm even looking for!
This is how my new spritekit scene looks like:
This is a screenshot from a tutorial where an asset importer kind of tab can be seen:
Any help is very much appreciated!!!
Post not yet marked as solved
In my app using storyboard and spritekit developed in Xcode 12.5.1 uses segue connected button to bring up another storyboard which presents a scene and show a sprite.
The segue sequence triggered by the use pressing the Play button and running the segue shows an upward transition
and the scene with the sprite that when clicked animates that sprite.
My problem is I was getting two events that are causing me issues.
The first is that I was expecting a sidewards transition for the Show segue.
and second that the scene only covers 2 thirds on the screen not all of it.
Screenshots of. Xcode showing main storyboard and segue connections, simulator app Settings, app Game initial view and app Game with sprite animated.
Anyone any hints for me for explanation of the first event and how to resolve the second which is spoiling my development time?
wmk.
