SKSpriteNode Won't Move - xcode

Question

I have created a rectangular image in the form of an SKSpriteNode in Swift with the following code:
var screenImage = SKSpriteNode(texture: SKTexture(imageNamed: "\(imageChoices[randomImageChoice].0)"))
screenImage.position = CGPointMake(screen1.position.x, screen1.position.y)
screenImage.size = CGSizeMake(self.frame.size.width * 0.6, self.frame.size.height)
self.addChild(screenImage)
I proceed to move the image with the following code:
func swipedTrue(sender: UISwipeGestureRecognizer) {
if gameOver == false && tutorial == false {
//if you swipe, it checks if you were right, then moves on or GameOver()
if (wordChoices[randomWordChoice]).1 == true {
//reset time
timePerQuestion = 1.0
//randomize word
randomWordChoice = Int(arc4random() % 3)
newImage = SKSpriteNode(texture: SKTexture(imageNamed: "\(wordChoices[randomWordChoice].0)"))
//randomize color of screens, mid-swipe
newScreen.fillColor = UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0)
//replace timeBar
decreaseTimeBlock.fillColor = newScreen.fillColor
decreaseTimeBlock.position = CGPointMake(self.frame.size.width * 1.5, self.frame.size.height * 0.985)
timeBarRedValue = 0.0; timeBarGreenValue = 1.0
newTimeBar.fillColor = UIColor(red: CGFloat(timeBarRedValue), green: CGFloat(timeBarGreenValue), blue: 0.0, alpha: 1.0)
//actions caused by swipe: it's "bringNewScreen" because if you swipeFalse, the newScreen comes from bottom. If you swipeTrue, it comes from the top.
var swipeTrueCurrentScreen = SKAction.moveToX(self.frame.size.width * 2, duration: 0.5)
var bringNewScreen = SKAction.moveToY(self.frame.size.height * 0.5, duration: 0.5)
var bringNewTimeBar = SKAction.moveToY(self.frame.size.height * 0.985, duration: 0.5)
//reset the newScreen and word to the top of the screen, to be dropped again
newScreen.position = CGPointMake(self.frame.size.width * 0.5, self.frame.size.height * 1)
newImage.position = CGPointMake(self.frame.size.width * 0.5, self.frame.size.height * 1)
newTimeBar.position = CGPointMake(self.frame.size.width * 0.5, self.frame.size.height * 1.58)
//swipe word and screen
currentImage.runAction(swipeTrueCurrentScreen)
currentTimeBar.runAction(swipeTrueCurrentScreen)
currentScreen.runAction(swipeTrueCurrentScreen)
//make swiping noise
runAction(SKAction.playSoundFileNamed("Swoosh 3-SoundBible.com-1573211927.mp3", waitForCompletion: false))
//bring in the newScreen
newScreen.runAction(bringNewScreen)
newImage.runAction(bringNewScreen)
newTimeBar.runAction(bringNewTimeBar)
//increase score
++score
scoreLabel.text = "\(score)"
//here, switch the currentScreen with the newScreen so that the process can be repeated
if newScreen == screen1 {
newScreen = screen2
newImage = screenImage2
newTimeBar = timeBar2
currentScreen = screen1
currentImage = screenImage1
currentTimeBar = timeBar1
} else {
newScreen = screen1
newImage = screenImage1
newTimeBar = timeBar1
currentScreen = screen2
currentImage = screenImage2
currentTimeBar = timeBar2
}
} else {
GameOver()
}
}
}
However, for some reason, the image will not move, and when I try to move it in other situations at well, it refuses. How can I fix this?

Answer 1

Except one missing parenthesis here (but I guess it's not the case in your code) the code have no particular reason to not work. The problem is most likely on how you use it.
My guess is that you are doing something like so :
import SpriteKit
class GameScene: SKScene {
var sprite : SKSpriteNode = SKSpriteNode() // A
override func didMoveToView(view: SKView) {
// You are creating another `sprite` variable
// and not using the (A) sprite you declare above
var sprite = SKSpriteNode(imageNamed:"Spaceship") // B
// Here you set the (B) sprite you just created
sprite.size = CGSizeMake(self.frame.size.width * 0.6, self.frame.size.height)
sprite.position = CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame));
// Here it's still the (B) sprite you just created
// that you add to the scene
self.addChild(sprite)
// You are calling your action from somewhere else
self.applyAction()
}
func applyAction() {
// You create an action, OK
let action = SKAction.moveToX(self.frame.size.width * 2, duration: 0.5)
// You apply the action to the (A) sprite property you have in your class
// Same as : self.sprite.runAction(action)
sprite.runAction(action)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}
In that case, you just have to not create another sprite variable. By removing the var keyword on the // B line.
Let met know if it helped.
If it's not the case, please give more details (code, ...).