SpriteKitジェスチャーの問題

だから私はこの戦術/パズルゲームにロックマンエグゼに似たタイルシステムを実装しようとしています。ただし、スワイプジェスチャでスプライトを目的の距離に移動することができないようです。

代わりに、ジェスチャによってスプライトがビューの左下に移動します。そのコーナーでは、ジェスチャーはまだ構成されたとおりに動作していないようです。

スプライトが左下に移動するのはなぜですか？

コードは次のとおりです。

class GameScene: SKScene {

var mageNodeOne: Mage?

//Swipe gesture handlers
func swipedRight(sender:UISwipeGestureRecognizer) {
    mageNodeOne!.position = CGPointMake(self.position.x + 115, self.position.y)
    println("swiped right")
}

func swipedLeft(sender:UISwipeGestureRecognizer) {
    mageNodeOne!.position = CGPointMake(self.position.x - 115, self.position.y)
    println("swiped left")
}

func swipedUp(sender:UISwipeGestureRecognizer) {
    mageNodeOne!.position = CGPointMake(self.position.x, self.position.y + 220)
    println("swiped up")
}

func swipedDown(sender:UISwipeGestureRecognizer) {
    mageNodeOne!.position = CGPointMake(self.position.x, self.position.y - 220)
    println("swiped down")
}

//Scene Setup
override func didMoveToView(view: SKView) {

    // Add gesture recognizers to view
    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)

    // Add tiles to view
    var tileSpacerOne = SKSpriteNode(imageNamed: "TileSpacer")
    tileSpacerOne.position = CGPoint(x: 508, y: 388)
    tileSpacerOne.zPosition = -1
    self.addChild(tileSpacerOne)

    var tileOne = SKSpriteNode(imageNamed: "TileExampleOne")
    tileOne.position = CGPoint(x: 350, y: 608)
    self.addChild(tileOne)

    var tileTwo = SKSpriteNode(imageNamed: "TileExampleOne")
    tileTwo.position = CGPoint(x: 350, y: 388)
    self.addChild(tileTwo)

    var tileThree = SKSpriteNode(imageNamed: "TileExampleOne")
    tileThree.position = CGPoint(x: 350, y: 168)
    self.addChild(tileThree)

    var tileFour = SKSpriteNode(imageNamed: "TileExampleOne")
    tileFour.position = CGPoint(x: 665, y: 608)
    self.addChild(tileFour)

    var tileFive = SKSpriteNode(imageNamed: "TileExampleOne")
    tileFive.position = CGPoint(x: 665, y: 388)
    self.addChild(tileFive)

    var tileSix = SKSpriteNode(imageNamed: "TileExampleOne")
    tileSix.position = CGPoint(x: 665, y: 168)
    self.addChild(tileSix)

    // Add mage to view
    mageNodeOne = Mage(imageNamed: "MageOne")
    mageNodeOne!.position = CGPointMake(667,475.5)
    addChild(mageNodeOne!)
}