Swift | I am trying to rotate a sprite and change the direction of rotation when I click

Your problem is that you are not deleting the old SKAction

one trying to rotate yours SKSpriteNode

. To do this, you need to keep track of how your sprite rotates. If I was going to implement this, I would subclass SKSpriteNode

, for example:

class RotatingSprite: SKSpriteNode {
    // This is used to keep track of which way the sprite is rotating.
    enum Direction {
        case Left, Right

        mutating func inverse() {
            switch self {
                case .Left : self = .Right
                case .Right: self = .Left
            }
        }
    }

    // These names will be the keys used when running an action.
    // This will allow you to stop the rotate-left or rotate-right actions.
    static let rotateLeftName  = "RotateLeftAction"
    static let rotateRightName = "RotateRightAction"

    var rotationDirection: Direction? {
        didSet {
            if let r = rotationDirection {
                switch r {
                    // Checks the sprite isn't already rotating to the left.
                    // If it isn't, make the sprite rotate to the left.
                    case .Left where oldValue != .Left:
                        rotateLeft()
                    case .Right where oldValue != .Right:
                        rotateRight()
                    default:
                        break
                }
            }
        }
    }

    private func rotateLeft() {
        // Remove the action rotating the sprite to the right.
        self.removeActionForKey(RotatingSprite.rotateRightName)
        // And start the action rotating the sprite to the left.
        let rotateAction = SKAction.rotateByAngle(-CGFloat(M_PI), duration: 1.0)
        self.runAction(SKAction.repeatActionForever(rotateAction), withKey: RotatingSprite.rotateLeftName)
    }

    private func rotateRight() {
        self.removeActionForKey(RotatingSprite.rotateLeftName)
        let rotateAction = SKAction.rotateByAngle(CGFloat(M_PI), duration: 1.0)
        self.runAction(SKAction.repeatActionForever(rotateAction), withKey: RotatingSprite.rotateRightName)
    }
}

      

        
        
        
      

    

Now you can use RotatingSprite

like this:

class GameScene: SKScene {
    let rotatingSprite = RotatingSprite(texture:bgTexture)

    override func didMoveToView(view: SKView) {
        rotatingSprite.position = CGPoint(x: frame.midX, y: frame.midY)
        self.addChild(rotatingSprite)
    }

    override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        // If the sprite isn't turning you've got to set it off.
        if rotatingSprite.rotationDirection == nil {
            rotatingSprite.rotationDirection = .Left

        // If it is turning, change its direction.
        } else {
            rotatingSprite.rotationDirection!.inverse()
        }
    }
}

      

        
        
        
      

    

Hope it helps!