Halt when presenting ViewController with SKScene - ios

Question

EDIT: OK, so this happens even with an empty SpriteKit scene!
What could be wrong here??
Why does iOS need 2 seconds to display SpriteKit scene??
EDIT 2: First time i click on tab bar to display view controller with SKScene it displays immediately, but every next time i try to navigate back to this view controller it will take it 2 seconds to display!
I have a a tab bar controller in my app with multiple different viewControllers.
One of them contains a SpriteKit scene, with a couple of nodes, 5 of them, nothing too heavy.
In simulator everything is fine, but when testing on the device i noticed that sometime there is a big halt ( around 2 seconds! ) when changing to ViewController with the SpriteKit scene.
Other times there is no halt and view is displayed immediately.
Now, i know there must be something I'm doing wrong here, because iOS should definitely be able to handle this.
This is my viewDidLoad function inside the viewController with the spriteKit scene:
override func viewDidLoad() {
super.viewDidLoad()
if let scene = MyScene(fileNamed:"MyScene") {
// Configure the view.
scene.switchView = switchView
let parentNode = scene.childNodeWithName("WholeObject") as! SKSpriteNode
let contentNode = scene.childNodeWithName("CenterNode") as! SKSpriteNode
addPhotoToFrame(contentNode, photoName: "woman", maskName: "circleMask")
let node1 = parentNode.childNodeWithName("node1") as! SKSpriteNode
addPhotoToFrame(zealNode1, photoName: "motherCircleImage", maskName: "circleMaskSmall")
let node2 = parentNode.childNodeWithName("node2") as! SKSpriteNode
addPhotoToFrame(zealNode2, photoName: "hairstylistCircleImage", maskName: "circleMaskSmall")
let node3 = parentNode.childNodeWithName("node3") as! SKSpriteNode
addPhotoToFrame(zealNode3, photoName: "dietCircleImage", maskName: "circleMaskSmall")
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
skView.presentScene(scene)
}
}

Answer 1

hi deloki i created a new project in swift and come with a solution its working fine on device..... check out my code
here is my GameViewController which call GameScene
import UIKit
import SpriteKit
extension SKNode {
class func unarchiveFromFile1(file : String) -> SKNode? {
if let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") {
var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as! GameScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
class GameViewController: UIViewController {
var skView:SKView!
override func viewDidLoad() {
super.viewDidLoad()
if let scene = GameScene.unarchiveFromFile1("GameScene") as? GameScene {
// Configure the view.
let graphRect:CGRect = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height)
skView = SKView();
skView.frame=graphRect
skView.showsFPS = true
skView.showsNodeCount = true
self.view.addSubview(skView)
/* 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
skView.presentScene(scene)
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(3 * Double(NSEC_PER_SEC)))
dispatch_after(delayTime, dispatch_get_main_queue()) {
let s2=GameViewController1();
self.presentViewController(s2, animated: true, completion: { () -> Void in
//
})
}
}
}
override func viewDidDisappear(animated: Bool) {
if((skView) != nil)
{
skView .removeFromSuperview();
skView=nil;
}
}
override func shouldAutorotate() -> Bool {
return true
}
override func supportedInterfaceOrientations() -> Int {
if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
return Int(UIInterfaceOrientationMask.AllButUpsideDown.rawValue)
} else {
return Int(UIInterfaceOrientationMask.All.rawValue)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Release any cached data, images, etc that aren't in use.
}
override func prefersStatusBarHidden() -> Bool {
return true
}
}
here is my GameViewController1 which call MyScene1
import UIKit
import SpriteKit
extension SKNode {
class func unarchiveFromFile(file : String) -> SKNode? {
if let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks") {
var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as! GameScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
class GameViewController1: UIViewController {
var skView:SKView!
override func viewDidLoad() {
super.viewDidLoad()
if let scene = GameScene.unarchiveFromFile("MyScene1") as? GameScene {
// Configure the view.
let graphRect:CGRect = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height)
skView=SKView()
skView.frame=graphRect
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
self.view.addSubview(skView)
skView.presentScene(scene)
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(3 * Double(NSEC_PER_SEC)))
dispatch_after(delayTime, dispatch_get_main_queue()) {
let s2=GameViewController();
self.presentViewController(s2, animated: true, completion: { () -> Void in
//
})
}
}
}
override func viewDidDisappear(animated: Bool) {
if((skView) != nil)
{
skView .removeFromSuperview();
skView=nil;
}
}
override func shouldAutorotate() -> Bool {
return true
}
override func supportedInterfaceOrientations() -> Int {
if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
return Int(UIInterfaceOrientationMask.AllButUpsideDown.rawValue)
} else {
return Int(UIInterfaceOrientationMask.All.rawValue)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Release any cached data, images, etc that aren't in use.
}
override func prefersStatusBarHidden() -> Bool {
return true
}
}
creating SKview from storyboard i just created it from programmitically and every 2 second i am switching from one view to another and its working fine on all device but one thing i used Xcode 6.4 and ios9
you can download link from http://www.filedropper.com/tryit

Answer 2

I have no idea what triggers the issue but pausing before the view disappeared fixed it for me.
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.contentView.paused = false
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
self.contentView.paused = true
}