Spawning multiple nodes in different locations - swift

Question

I'm trying to spawn multiple SKSpriteNodes within the set location, but when I add multiple nodes they just spawn on top of each other? Is there a way to not make this happen?
I'm also having a problem of having to refresh the page in order to get a new location for the node. Is there a way so if the node disappears on the page it will spawn in a new location within the set co-ords?
let rect = CGRectMake(x: 90, y: 360, width: 200, height: 200)
let x = rect.origin.x + CGFloat(arc4random()) % rect.size.width
let y = rect.origin.y + CGFloat(arc4random()) % rect.size.height
let randomPoint = CGPointMake(x, y)
self.redcircle.position = randomPoint
self.addChild(redcircle)
self.bluecircle.position = randomPoint
self.addChild(bluecircle)

Answer 1

You need 2 randomPoint's to put them on a another place.
You use 2 Nodes with one Position cause randomPoint is always the same.
Edit(question in comment):
You have to use min(x, y) and max(x, y)
let x = random(CGRectGetMinX(self.frame), max: CGRectGetMaxX(self.frame))
let y = random(CGRectGetMinY(self.frame), max: CGRectGetMaxY(self.frame))
let randomPoint = CGPointMake(x, y)
self.redcircle.position = randomPoint
self.addChild(red circle)
And here the random function:
func random() -> CGFloat {
return CGFloat(Float(arc4random()) / 0xFFFFFFFF)
}
func random(min: CGFloat, max: CGFloat) -> CGFloat {
return random() * (max - min) + min
}

Answer 2

It would be easier for you to make a method which generates random point based on given rectangle. Or method which spawns sprite within given rectangle, like this:
import SpriteKit
class GameScene: SKScene {
let rect = CGRect(x: 90, y: 360, width: 200, height: 200)
override func didMoveToView(view: SKView) {
let debug = SKSpriteNode(color: SKColor.redColor(), size: rect.size)
debug.alpha = 0.2
debug.position = rect.origin
let origin = SKSpriteNode(color: SKColor.redColor(), size:CGSize(width: 5, height:5))
debug.addChild(origin)
self.addChild(debug)
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let sprite = spawnSpriteAtRandomPositionWithinRect(rect)
self.addChild(sprite)
println("Sprite spawned at position x,y( \(sprite.position.x), \(sprite.position.y))")
}
func randomBetweenNumbers(firstNum: CGFloat, secondNum: CGFloat) -> CGFloat{
return CGFloat(arc4random()) / CGFloat(UINT32_MAX) * abs(firstNum - secondNum) + min(firstNum, secondNum)
}
func spawnSpriteAtRandomPositionWithinRect(rectangle:CGRect)->SKSpriteNode{
let x = randomBetweenNumbers(rectangle.origin.x - rectangle.size.width / 2.0 , secondNum: rectangle.origin.x + rectangle.size.width/2.0)
let y = randomBetweenNumbers(rectangle.origin.y - rectangle.size.height / 2.0 , secondNum: rectangle.origin.y + rectangle.size.height/2.0)
let sprite = SKSpriteNode(color: SKColor.greenColor(), size:CGSize(width: 30, height: 30))
sprite.position = CGPoint(x: x, y: y)
return sprite
}
}
Sprite named debug is not needed actually, but it shows you visually given rectangle.