To show the score and a button, we will add it to the 2D SpriteKit layer. To add the overlay, create a class called OverlaySKscene. In the class, add the following:
import SpriteKit
class OverlaySKScene: SKScene {
let _gameScene: GameSCNScene!
let myLabel: SKLabelNode!
var gameOverLabel: SKLabelNode!
var jumpBtn: SKSpriteNode!
var playBtn: SKSpriteNode!
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
init(size: CGSize, gameScene: GameSCNScene){
super.init(size: size)
}
}We import SpriteKit as we will have to create a SubClass of SpriteKit. Create global variables of type GameSCNScene, SKLabelNodes, and SpriteNodes. Here, we create two LabelNodes: one for displaying the score and the other to show the gameover text. We also create two SpriteNodes: one for the play button and the other for the jump button.