Randomize different enemy in spritekit to move towards player

Question

I was wondering if anyone could answer my question. I have created 3 different enemy animations with texture atlas in Sprite-kit and I was wondering if there is a way that an enemy is randomly picked to move towards the player as soon as the game begins.

TextureAtlas = SKTextureAtlas(named: "zombies.atlas")
for i in 1...TextureAtlas.textureNames.count {
    let Z = "z\(i).png"
    zombieArray.append(SKTexture(imageNamed: Z))
}


TextureAtlas = SKTextureAtlas(named: "baldzomb.atlas")
for i in 1...TextureAtlas.textureNames.count {
    let bald = "baldzomb_\(i).png"
    baldArray.append(SKTexture(imageNamed: bald))
}

TextureAtlas = SKTextureAtlas(named: "crawler.atlas")
for i in 1...TextureAtlas.textureNames.count {
    let Name = "crawler_\(i).png"
    crawlerArray.append(SKTexture(imageNamed: Name))

}

Answer 1

You can do it like this:

class GameScene: SKScene {


    let storage = [
        SKSpriteNode(color:.brown, size:CGSize(width: 50, height: 50)),
        SKSpriteNode(color:.white, size:CGSize(width: 50, height: 50)),
        SKSpriteNode(color:.black, size:CGSize(width: 50, height: 50)),
        ]

    func getRandomSprite(fromArray array:[SKSpriteNode])->SKSpriteNode{

        return array[Int(arc4random_uniform(UInt32(array.count)))]
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)

        let sprite = getRandomSprite(fromArray: storage)

        if let location = touches.first?.location(in: self){

            if let copy = sprite.copy() as? SKSpriteNode {
                //sprite can have only one parent, so I add a copy, just because of better example
                copy.position = location
                addChild(copy)
            }
        }
    } 
}

So basically you have an array of sprites/textures/whatever and you generate random index based on array length, and return a random element. You can make an extension as well, and do something like yourArray.random.