Many of my favorite games grant temporary invulnerability when the player picks up a Star. We will add a hyperactive Power-up Star to our game. Meet our Star:
Now that the art is in place, you can create a new Swift file named Star.swift in your project; we will continue to organize classes into distinct files. The Star class will be similar to the bee class we created earlier. It will inherit from SKSpriteNode and adhere to our GameSprite protocol. The Star will add a lot of power to the player, so we will also give it a special SKAction-based zany animation to make it stand out.
To create the Star class, add the following code in your Star.swift file:
import SpriteKit
class Star: SKSpriteNode, GameSprite {
var initialSize = CGSize(width: 40, height: 38)
var textureAtlas:SKTextureAtlas =
SKTextureAtlas(named: "Environment")
var pulseAnimation = SKAction()
init() {
...