Preloading textures in SpriteKit

Question

I\'ve done some research and I can\'t seem to find anything that clearly explains how to go about preloading both single textures and textures within animations. I\'m currently

Answer 1

I tried to implement appzYourLife answer but it increased the time to load every texture. So I ended up putting all the most used Sprites in one single atlas and puting it in a singleton.

class Assets {
    static let sharedInstance = Assets()
    let sprites = SKTextureAtlas(named: "Sprites")

    func preloadAssets() {
        sprites.preloadWithCompletionHandler {
            print("Sprites preloaded")
        }
    }
}

I call Assets.sharedInstance.preloadAssets() in menuScene. And:

let bg1Texture = Assets.sharedInstance.sprites.textureNamed("background1")
bg1 = SKSpriteNode(texture: bg1Texture)

to reference a texture already loaded in memory.