In the previous chapters, you’ve worked within the SceneKit paradigm; however, Apple has created a way for you to add a 2D scene to overlay on your 3D scenes. In this chapter, you’ll add a 2D scene that will be used for your timer so it can track how long it will take you and your friends to find and capture the enemy.
SpriteKit Integration
SceneKit gives you a property to add a SpriteKit scene:
var overlaySKScene: SKScene! { get set }
This property can render a 2D scene ...