What is the problem with this init(coder:) function? - swift

Question

I don't get it guys.
I'm trying to create a 2D game and i'm stuck with a very basic issue.
Here is my code:
import SpriteKit
class GameScene: SKScene {
let box: SKSpriteNode
let hero: SKSpriteNode
override init(size: CGSize){
hero = SKSpriteNode(color: UIColor.red, size: CGSize(width: size.width / 5, height: size.height / 5))
box = SKSpriteNode(color: UIColor.blue, size: CGSize(width: size.width, height: size.height))
super.init(size: size)
self.addChild(box)
self.addChild(hero)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func didMove(to view: SKView) {
// Setting up the scene
}
override func update(_ currentTime: TimeInterval) {
// Called before each frame is rendered
}
Xcode indicates me the following error :"Property 'self.box' not initialized at super.init call" at the init (coder:) function.
Then i tried to replace it with:
required init?(coder a Decoder: NSCoder){
fatalError("init(coder:) has not been implemented)
}
But guess what... when i launch the game it indicates me that i have a fatal error.
When i delete all initializers it tells me that i need initialisers.
Do you have any idea of how to do it?

Answer 1

Given that box and hero are not optional, they must be initialized in all initializers.
You have done it for your custom initializer but you also need to do it for init with coder since that initializer can be invoked separate from your custom initializer.