Really Need Help About UITouch (Sprite Kit) - swift

Question

i Like to create left side and right side that when i touch them , A bird will fly to the left or right !
I create a bird
var birdtexture = SKTexture(imageNamed: "flappy1.png")
bird = SKSpriteNode(texture: birdtexture)
bird.position
bird.size
bird.physicsBody = SKPhysicsBody(circleOfRadius: bird.size.width/2)
bird.physicsBody?.dynamic = true
bird.physicsBody?.allowsRotation = false
self.addChild(bird)
Then i create left node
var groundleft = SKSpriteNode()
groundleft.position = CGPoint(x: 0, y: 50)
groundleft.size = CGSize(width: 500, height: 100)
groundleft.color = UIColor(red: 7, green: 5, blue: 7, alpha: 20)
groundleft.physicsBody = SKPhysicsBody(rectangleOfSize:CGSizeMake(self.size.width, 100))
groundleft.physicsBody?.dynamic = true
groundleft.physicsBody?.affectedByGravity = false
groundleft.name = "toleft"
self.addChild(groundleft)
then i go to TouchBegan
let touch = touches.first as! UITouch
let touchLocation = touch.locationInNode(self)
let touchedNode = self.nodeAtPoint(touchLocation)
if(touchedNode.name == "toleft"){
bird.physicsBody?.velocity = CGVectorMake(0, 0)
bird.physicsBody?.applyImpulse(CGVectorMake(-10, 100))
}
why it didnt work . Is my method wrong ? Is there any another way for me to make it work ??
please help , so many thanks

Answer 1

In your touchesBegan method try this:
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
if let touch = touches.first as? UITouch {
let touchLocation = touch.locationInNode(self)
if nodeAtPoint(touchLocation) == groundleft { //your sprite node
//do something
}
}
super.touchesBegan(touches , withEvent:event)
}