One touch moving in 2 points, but it is not moving - ios

Question

Please help!
I want to let my ball moving when the screen is touched to other position and on next touch to original position.
I only want to change X position the Y will be the same.
But when I touch the screen it is doing nothing.
This is the code, I have written for the ball.
override func didMoveToView(view: SKView) {
addball()
}
func addball() {
ball = SKSpriteNode(imageNamed: "Ball")
self.ball.position = CGPointMake(frame.size.width/4, frame.size.height/3)
self.addChild(ball)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
if touches.count % 2 == 0 {
let right = SKAction.moveToX(frame.size.width/4*3, duration: 0.1)
self.ball.runAction(right)
} else {
let left = SKAction.moveToX(frame.size.width/4, duration: 0.1)
self.ball.runAction(left)
}
}
}
Thanks for all answers:)

Answer 1

This may be a silly answer, but are you touching it with 2 fingers at the same time?
Try doing touches.count > 0 instead to test if it is just the touch.
If you are touching 1 finger, then another, your touch count will stay at 1 because only 1 touch began event happened.
The first touch will be part of the move state, the second touch is your begin state
Edit:
var toggle = false;
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
if toggle {
let right = SKAction.moveToX(frame.size.width/4*3, duration: 0.1)
self.ball.runAction(right)
} else {
let left = SKAction.moveToX(frame.size.width/4, duration: 0.1)
self.ball.runAction(left)
}
}
toggle = !toggle;
}