Randomly spawn SKNode on the x position?

Question

I have a game and I can't seem to get the node to randomly spawn on x position, it will randomly spawn but often will go off screen and the game is then useless and have to restart it:

func addEnemy () {
    //enemy
    let minValue = self.size.width / 8;
    let maxValue = self.size.width-20;
    let spawnPoint = UInt32(maxValue - minValue);

    Enemy = SKSpriteNode(imageNamed: "Enemy")
    Enemy.size = CGSize(width: 150, height: 200)

    Enemy.position = CGPoint(x: CGFloat(arc4random_uniform(spawnPoint)), y: self.size.height)
    self.addChild(Enemy)
}

user3441734 · Answer 1 · 2015-10-29T10:14:21.740

1

let min: CGFloat = 15.0
let max: CGFloat = 200.0
let randomCGFloatBetweenMinAndMax = CGFloat(rand())/CGFloat(RAND_MAX)*(max-min)+min

or if you prefer

let randomCGFloatBetweenMinAndMax2 = CGFloat(arc4random_uniform(UInt32(max-min)) + UInt32(min))

edited Oct 29 '15 at 10:14

answered Oct 29 '15 at 10:04

user3441734

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thank you so much! i hade to edit it to min = self.size.width / 15.0 and max = self.size.width - 200 – Tye Howatt Oct 29 '15 at 17:11

Randomly spawn SKNode on the x position?

1 Answers1