Node not moving after changing scenes - xcode

Question

I made a (basic) game, works perfect, goes to GameOverScene, and when it comes back from GameOverScene to GameScene, the player(spritenode) is not moving anymore..
I commented in the GameScene code which functions its about
I get no error from Xcode!
the bug is in the gamescene.swift file(functions: swipedRight + swipedLeft + swipedUp + swipedDown):
import SpriteKit
class GameScene: SKScene, SKPhysicsContactDelegate {
var kikker:SKSpriteNode = SKSpriteNode()
var auto1:SKSpriteNode = SKSpriteNode()
var lastYieldTimeInterval:NSTimeInterval = NSTimeInterval()
var lastUpdateTimerInterval:NSTimeInterval = NSTimeInterval()
let playerCategory:UInt32 = 0x1 << 1
let auto1Category:UInt32 = 0x1 << 0
required init(coder aDecoder:NSCoder) {
fatalError("NSCoder not supported")
}
override init(size:CGSize) {
super.init(size:size)
anchorPoint = CGPoint(x:0, y:1.0)
let background = SKSpriteNode(imageNamed: "bg5")
var auto1:SKSpriteNode = SKSpriteNode(imageNamed: "auto1")
background.position = CGPoint(x:0, y:0)
background.anchorPoint=CGPoint(x:0,y:1.0)
addChild(background)
kikker = SKSpriteNode(imageNamed:"kikker5")
kikker.anchorPoint = CGPoint(x:0.5, y:0.5)
kikker.xScale = 0.22
kikker.yScale = 0.22
self.physicsWorld.gravity = CGVectorMake(0,0)
self.physicsWorld.contactDelegate = self
kikker.physicsBody?.categoryBitMask = playerCategory
kikker.physicsBody?.contactTestBitMask = auto1Category
kikker.physicsBody?.collisionBitMask = 0
kikker.physicsBody?.usesPreciseCollisionDetection = true
kikker.physicsBody = SKPhysicsBody(circleOfRadius: kikker.size.width/2)
kikker.physicsBody?.dynamic = false
kikker.position = CGPointMake(self.frame.size.width/2, -610)
addChild(kikker)
println(kikker.position)
}
func didBeginContact(contact: SKPhysicsContact!) {
var firstBody:SKPhysicsBody
var secondBody:SKPhysicsBody
if(contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask){
firstBody = contact.bodyA
secondBody = contact.bodyB
}else{
firstBody = contact.bodyB
secondBody = contact.bodyA
}
if((firstBody.categoryBitMask & auto1Category) != 0 && (secondBody.categoryBitMask & playerCategory) != 0)
{
println("aasda")
aangereden(contact.bodyB.node as SKSpriteNode, player: contact.bodyA.node as SKSpriteNode)
}
}
func addCar(){
var auto1:SKSpriteNode = SKSpriteNode(imageNamed: "auto2")
auto1.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(auto1.size.width/2, auto1.size.height/2) )
auto1.physicsBody?.dynamic = true
auto1.physicsBody?.categoryBitMask = auto1Category
auto1.physicsBody?.contactTestBitMask = playerCategory
auto1.physicsBody?.collisionBitMask = 0
auto1.physicsBody?.usesPreciseCollisionDetection = true
let position : CGFloat = 51 + (CGFloat(arc4random_uniform(4)+2)*(-111))
auto1.anchorPoint = CGPoint(x:0.5, y:0.5)
auto1.position = CGPointMake(-auto1.size.width/2, position)
self.addChild(auto1)
let minDuration = 2.5
let maxDuration = 4.0
let rangeDuration = maxDuration - minDuration
let duration = Int(arc4random()) % Int(rangeDuration) + Int(minDuration)
var actionArray:NSMutableArray = NSMutableArray()
actionArray.addObject(SKAction.moveTo(CGPointMake(375 + auto1.size.width/2, position), duration: NSTimeInterval(duration)))
actionArray.addObject(SKAction.removeFromParent())
auto1.runAction(SKAction.sequence(actionArray))
}
println("DOOD")
player.removeFromParent()
}
func updateWithTimeSinceLastUpdate(timeSinceLastUpdate:CFTimeInterval){
lastYieldTimeInterval += timeSinceLastUpdate
if (lastYieldTimeInterval > 2.5){
lastYieldTimeInterval = 0
addCar()
}
}
//#1 function not working after changing scenes: the function is executing, the println works
but for some reason the runAction doesnt do its job, the node(kikker) is not moving as it should
func swipedRight1(sender:UISwipeGestureRecognizer){
var naarRechts = SKAction()
var positionX = kikker.position.x
println("right2")
if(kikker.position.x<200){
println(positionX)
positionX = kikker.position.x + 125
println(positionX)
naarRechts = SKAction.moveToX(positionX , duration: 0.25)
kikker.zRotation=(-1.570)
kikker.runAction(naarRechts)
}
}
//#2 function not working, same story
func swipedLeft1(sender:UISwipeGestureRecognizer){
var naarLinks = SKAction()
var positionX = kikker.position.x
if(kikker.position.x>150){
positionX = kikker.position.x - 125
naarLinks = SKAction.moveToX(positionX , duration: 0.25)
kikker.zRotation=(1.570)
kikker.runAction(naarLinks)
}
}
//#3 function not working, same story
func swipedDown1(sender:UISwipeGestureRecognizer){
var naarBeneden = SKAction()
var positionY = kikker.position.y
if(kikker.position.y>(-600)){
positionY = kikker.position.y - 111
naarBeneden = SKAction.moveToY(positionY , duration: 0.25)
kikker.zRotation=3.141
kikker.runAction(naarBeneden)
}
}
//#4 function not working, same story
func swipedUp1(sender:UISwipeGestureRecognizer){
var naarBoven = SKAction()
var positionY = kikker.position.y
if(kikker.position.y < (-60)){
positionY = kikker.position.y + 111
naarBoven = SKAction.moveToY(positionY, duration: 0.25)
kikker.zRotation=0
kikker.runAction(naarBoven)
}
if(positionY > (-60)){
var gameOverScene:SKScene = GameOverScene(size: self.size)
self.view?.presentScene(gameOverScene)
}
}
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
var timeSinceLastUpdate = currentTime - lastUpdateTimerInterval
lastUpdateTimerInterval = currentTime
if (timeSinceLastUpdate > 1){
timeSinceLastUpdate = 1/60
lastUpdateTimerInterval = currentTime
}
updateWithTimeSinceLastUpdate(timeSinceLastUpdate)
}
}
here the GameOverScene file:
import UIKit
import SpriteKit
class GameOverScene: SKScene {
override init(size:CGSize){
super.init(size:size)
self.backgroundColor = SKColor.whiteColor()
var message:NSString = NSString()
message = "Game Over"
var label:SKLabelNode = SKLabelNode(fontNamed:"DamascusBold")
label.text = message
label.fontColor = SKColor.blackColor()
label.position = CGPointMake(self.size.width/2, self.size.height/2)
self.addChild(label)
var scene:GameScene!
self.runAction(SKAction.sequence([SKAction.waitForDuration(3.0),
SKAction.runBlock({
// var transition:SKTransition = SKTransition.flipHorizontalWithDuration(0.5)
var scene1:SKScene = GameScene(size: self.size)
self.view?.presentScene(scene1)
})
] ))
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
gameviewcontroller file:
import UIKit
import SpriteKit
import AVFoundation
class GameViewController: UIViewController, UITextFieldDelegate{
var scene:GameScene!
func swipedRight(sender: UISwipeGestureRecognizer){
scene.swipedRight1(sender)
}
func swipedLeft(sender: UISwipeGestureRecognizer){
scene.swipedLeft1(sender)
}
func swipedDown(sender: UISwipeGestureRecognizer){
scene.swipedDown1(sender)
}
func swipedUp(sender: UISwipeGestureRecognizer){
scene.swipedUp1(sender)
}
override func viewDidLoad() {
super.viewDidLoad()
let skView = view as SKView
skView.multipleTouchEnabled = false
scene = GameScene(size: skView.bounds.size)
scene.scaleMode = SKSceneScaleMode.AspectFill
skView.presentScene(scene)
let swipeRight:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedRight:"))
swipeRight.direction = .Right
view.addGestureRecognizer(swipeRight)
let swipeLeft:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedLeft:"))
swipeLeft.direction = .Left
view.addGestureRecognizer(swipeLeft)
let swipeUp:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedUp:"))
swipeUp.direction = .Up
view.addGestureRecognizer(swipeUp)
let swipeDown:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipedDown:"))
swipeDown.direction = .Down
view.addGestureRecognizer(swipeDown)
}
override func prefersStatusBarHidden() -> Bool {
return true
}
}

Answer 1

You're calling your swipedUp1 (etc) methods on the wrong scene. Here's what's happening:
Your view controller has a reference to the GameScene instance that you start with. Its gesture action methods call to that, and all is well.
When you start a new game from GameOverScene, that creates a new instance of GameScene and presents it in the view. Now you have two instances of GameScene: the one your view controller is still pointing to, and the one the view is now rendering.
When you're gesture actions fire, they're still talking to the first GameScene. So your log lines get printed, but you don't see anything happen because the second GameScene is the one being displayed.
You probably don't want two scenes sticking around, anyway.
You can fix both problems by eliminatimg the scene property in your view controller and having your gesture actions call through to view.scene instead (after appropriate casting):
func swipedUp(sender: UISwipeGestureRecognizer) {
let skView = view as SKView
let gameScene = skView.scene as GameScene
gameScene.swipedUp1(sender)
}
This way, the swipe goes to whichever scene the view controller's view is currently presenting.
Alternatively, you could keep your original swipedUp (etc) code, and change scene from a stored property to a read-only computed one that always gets you the currently presented scene:
var scene: GameScene {
let skView = view as SKView
return skView.scene as GameScene
}