enumerateChildNodes not finding child nodes in sprite kit - Swift 4 - swift

Question

I am trying to create a SpriteKit game where a ball moves across the screen. When the ball leaves the screen I would like to remove it from the parent and switch to a different scene (GameOverScene).
I am using enumerateChildNodes however it doesn't as if that is working. I am not really sure what the problem is however I think it may have something to do with the parent/child relationship...
func createBall(forTrack track: Int) {
setupTracks()
player?.physicsBody?.linearDamping = 0
player = SKSpriteNode(imageNamed: "small")
player?.name = "BALL"
player?.size = CGSize(width: 100, height: 100)
ballValue = 1
randFloat = Float(arc4random()) / Float(UINT32_MAX)
if randFloat > 0.001 {
ballSpeed = randFloat / 50
}
else {
ballSpeed = randFloat / 50
}
let ballPosition = trackArray?[track].position
player?.position = CGPoint(x: (ballPosition?.x)!, y: (ballPosition?.y)!)
player?.position.y = (ballPosition?.y)!
if ballDirection == "right" {
player?.position.x = 0
moveRight()
}
else {
player?.position.x = (self.view?.frame.size.height)!
moveLeft(speed: ballSpeed)
}
self.addChild(player!)
self.enumerateChildNodes(withName: "BALL") { (node: SKNode, nil) in
if node.position.x < -100 || node.position.x > (self.size.width) + 100 {
print("balls Out")
node.removeFromParent()
let transition = SKTransition.fade(withDuration: 1)
self.gameScene = SKScene(fileNamed: "GameOverScene")
self.gameScene.scaleMode = .aspectFit
self.view?.presentScene(self.gameScene, transition: transition)
}
}
}
I call this function twice, first in override func didMove():
override func didMove(to view: SKView) {
createHUD()
createBall(forTrack: track)
}
And second in override func touchesBegan:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let location = touch.previousLocation(in: self)
let node = self.nodes(at: location).first
if node?.name == "BALL" {
currentScore += ballValue
player?.removeFromParent()
createBall(forTrack: track)
}
else {
let transition = SKTransition.fade(withDuration: 1)
gameScene = SKScene(fileNamed: "GameOverScene")
gameScene.scaleMode = .aspectFit
self.view?.presentScene(gameScene, transition: transition)
}
}
}
update:
The line self.enumerateChildNodes(withName: "BALL") { (node: SKNode, nil) in works so it is not a child parent relationship issue. The if statement is not working.

Answer 1

reading your code I think it's not about a solution, but a different approach. These suggestions will make your life easier:
Start with a smaller code, avoid or comment out all unneeded (like the if randFloat)
Force unwrap player = SKSpriteNode(imageNamed: "small")! with the ! because you actually want to crash if the initialization fails, then you can get rid of all ?
in touchesBegan, better use for touch in touches { as it is more simple to manage
let location = touch.previousLocation(in: self) you probably mean let location = touch.location(in: self)
When the ball leaves the screen I would like to remove it from the parent so this is something happening at some time in the game. You would like to call your self.enumerateChildNodes(withName: "BALL") { into the update call, not every time you touch the screen
If this is not enough, feel free to post the least amount of code to make a playground and let me test it for you :]