xcode 6 drawing line error - xcode

Question

Hi everyone i am making a sprite-kit app in which the user must be able to draw multiple lines. To do this I made the following code.
import SpriteKit
class GameScene: SKScene {
var line = SKShapeNode()
var path = CGPathCreateMutable()
var touch: UITouch!
var location:CGPoint!
override func didMoveToView(view: SKView) {
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
touch = touches.anyObject() as UITouch!
location = touch.locationInNode(self)
drawLine()
}
override func touchesEnded(touches: NSSet!, withEvent event: UIEvent!) {
self.delete(line)
}
func drawLine() {
CGPathMoveToPoint(path, nil, location.x, location.y)
CGPathAddLineToPoint(path, nil, 500.0, 500.0)
line.path = path
line.strokeColor = UIColor.redColor()
line.lineWidth = 5.0
self.addChild(line)
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}
This works but when the users tries the draw the second line the application crashes.
Can someone explain to me why that is happening?
------Edit------
I think i need to use an array of lines so I did something like this:
var line: [[SKShapeNode]] = []
which gives me the following error:
[[SKShapeNode]] does not have a member named 'path'.
So I though I had to make the path variable an array as well but that only gave me a second error: GameScene does not have a member named 'path'. So I changed it all back but I still think I have to use an array although I can't really figure out how to make it work.

Answer 1

Copy and paste this..now you'll redefine your line every time
import SpriteKit
class GameScene: SKScene {
var line = SKShapeNode()
var path = CGPathCreateMutable()
var touch: UITouch!
var location:CGPoint!
override func didMoveToView(view: SKView) {
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
/* Called when a touch begins */
touch = touches.anyObject() as UITouch!
location = touch.locationInNode(self)
drawLine()
}
override func touchesEnded(touches: NSSet!, withEvent event: UIEvent!) {
self.delete(line)
}
func drawLine() {
CGPathMoveToPoint(path, nil, location.x, location.y)
CGPathAddLineToPoint(path, nil, 500.0, 500.0)
SKShapeNode *line = [SKShapeNode node]; //redfine line every time
line.path = path
line.strokeColor = UIColor.redColor()
line.lineWidth = 5.0
self.addChild(line)
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
}
}