Accelerometer works in first game, but goes crazy in the second - ios

Question

I'm creating a game where a player will control a falling sprite with the accelerometer X axis and an impulse is added when the user taps on the screen. In my current code when I run the game, it works okay and then once the player dies and tries again the sprite goes crazy and just flies of the screen. Can someone help please...
class PlayScene: SKScene, SKPhysicsContactDelegate {
var score = 0
var scoreLabel = SKLabelNode()
var gameOverLabel = SKLabelNode()
var labelHolder = SKSpriteNode()
var background = SKSpriteNode()
let playerGroup:UInt32 = 1
let objectGroup:UInt32 = 2
let gapGroup:UInt32 = 0 << 3
let boundary:UInt32 = 4
var movingObjects = SKNode()
var motionManager = CMMotionManager()
var destX:CGFloat = 0.0
var gameOver = 0
var currentX: CGFloat?
let greenPlayer = SKSpriteNode(imageNamed: "Image/Players/greenPlayer.png")
override func didMoveToView(view: SKView) {
self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
self.physicsWorld.contactDelegate = self
self.physicsBody!.friction = 0
self.physicsWorld.gravity = CGVectorMake(-0.0, -0.8)
self.addChild(labelHolder)
scoreLabel.fontName = "Helvetica"
scoreLabel.fontSize = 60
scoreLabel.text = "0"
scoreLabel.position = CGPointMake(CGRectGetMidX(self.frame), self.frame.size.height - 140)
scoreLabel.zPosition = 10
self.addChild(scoreLabel)
//self.physicsWorld.contactDelegate = self
self.addChild(movingObjects)
let backgroundTexture = SKTexture(imageNamed: "Image/TempBG.png")
background=SKSpriteNode(texture: backgroundTexture)
background.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
background.size.width = self.frame.width
background.zPosition = 0
self.addChild(background)
greenPlayer.physicsBody = SKPhysicsBody(circleOfRadius: greenPlayer.size.height/2)
greenPlayer.physicsBody?.dynamic = true
greenPlayer.physicsBody?.allowsRotation = false
greenPlayer.physicsBody?.categoryBitMask = playerGroup
greenPlayer.physicsBody?.collisionBitMask = objectGroup
greenPlayer.physicsBody?.contactTestBitMask = objectGroup
greenPlayer.physicsBody?.collisionBitMask = gapGroup
greenPlayer.physicsBody?.collisionBitMask = boundary
//self.greenPlayer.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
self.greenPlayer.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
greenPlayer.zPosition = 5
self.addChild(greenPlayer)
currentX = self.greenPlayer.position.x
//if motionManager.accelerometerAvailable == true {
motionManager.startAccelerometerUpdatesToQueue(NSOperationQueue.currentQueue()!, withHandler:{ data, error in
if data!.acceleration.x < 0 {
self.destX = self.currentX! + CGFloat(data!.acceleration.x * 1000)
}
else if data!.acceleration.x > 0 {
self.destX = self.currentX! + CGFloat(data!.acceleration.x * 1000)
}
})
NSTimer.scheduledTimerWithTimeInterval(2, target: self, selector: Selector("makeDodges"), userInfo: nil, repeats: true)
}
func makeDodges() {
if(gameOver == 0){
let gapWidth = greenPlayer.size.width * 3
let movementAmount = arc4random() % UInt32(self.frame.size.width / 2)
let dodgeOffSet = CGFloat(movementAmount) - (self.frame.size.width / 4)
let moveDodges = SKAction.moveByX(0, y: self.frame.size.height * 2, duration: NSTimeInterval(self.frame.size.height / 100))
let removeDodges = SKAction.removeFromParent()
let moveAndRemoveDodges = SKAction.sequence([moveDodges, removeDodges])
let dodge1Texture = SKTexture(imageNamed: "Image/Dodge.png")
let dodge1 = SKSpriteNode(texture: dodge1Texture)
dodge1.position = CGPoint(x: CGRectGetMidX(self.frame) + dodge1.size.width/2 + gapWidth/2 + dodgeOffSet, y: CGRectGetMidY(self.frame) - self.frame.size.height)
dodge1.runAction(moveDodges)
dodge1.physicsBody = SKPhysicsBody(rectangleOfSize: dodge1.size)
dodge1.physicsBody?.dynamic = false
dodge1.physicsBody?.categoryBitMask = objectGroup
dodge1.zPosition = 10
movingObjects.addChild(dodge1)
let dodge2Texture = SKTexture(imageNamed: "Image/Dodge.png")
let dodge2 = SKSpriteNode(texture: dodge2Texture)
dodge2.position = CGPoint(x: CGRectGetMidX(self.frame) - dodge2.size.width/2 - gapWidth/2 + dodgeOffSet , y: CGRectGetMidY(self.frame) - self.frame.size.height)
dodge2.runAction(moveDodges)
dodge2.physicsBody = SKPhysicsBody(rectangleOfSize: dodge2.size)
dodge2.physicsBody?.dynamic = false
dodge2.physicsBody?.categoryBitMask = objectGroup
dodge2.zPosition = 10
movingObjects.addChild(dodge2)
let gap = SKNode()
gap.position = CGPoint(x: CGRectGetMidX(self.frame) + dodgeOffSet , y: CGRectGetMidY(self.frame) - self.frame.size.height)
gap.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(dodge1.size.height, gapWidth))
gap.runAction(moveAndRemoveDodges)
gap.physicsBody?.dynamic = false
gap.physicsBody?.collisionBitMask = gapGroup
gap.physicsBody?.categoryBitMask = gapGroup
gap.physicsBody?.contactTestBitMask = playerGroup
movingObjects.addChild(gap)
}
}
func didBeginContact(contact: SKPhysicsContact) {
if contact.bodyA.categoryBitMask == gapGroup || contact.bodyB.categoryBitMask == gapGroup {
score++
print(score)
scoreLabel.text = "\(score)"
} else {
if gameOver == 0 {
gameOver = 1
movingObjects.speed = 0
let scene:SKScene = GameScene(size: self.frame.size)
scene.scaleMode = .AspectFill
let transition:SKTransition = SKTransition.fadeWithDuration(2)
self.view?.presentScene(scene, transition: transition)
}
}
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if(gameOver == 0) {
greenPlayer.physicsBody?.velocity = CGVectorMake(0, 0)
greenPlayer.physicsBody?.applyImpulse(CGVectorMake(0, 50))
} else {
score = 0
scoreLabel.text = "0"
movingObjects.removeAllChildren()
self.greenPlayer.position = CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame))
greenPlayer.physicsBody?.velocity = CGVectorMake(0, 0)
labelHolder.removeAllChildren()
gameOver = 0
movingObjects.speed = 1
currentX = CGRectGetMidX(self.frame)
}
}
override func update(currentTime: CFTimeInterval) {
let action = SKAction.moveToX(destX, duration: 1)
self.greenPlayer.runAction(action)
}
}

Answer 1

You never stop and remove the old motion manager queue, so your old scene will never die, thus causing your problems.
Add motionManager.stopAccelerometerUpdates();motionManager = nil; at the point you want to destroy your old scene, If you are not destroying your old scene, and just resetting your data, then just add motionManager.stopAccelerometerUpdates(); to the point where you are going to reset your scene.