Adding the coins

Coins are more fun if there are two value variations. We will create two coins:

• A bronze coin, worth one coin

• A gold coin, worth five coins

The two coins will be distinguishable by their color, as seen here:

Creating the coin classes

We only need a single Coin class to create both denominations. Everything in the Coin class should look very familiar at this point. To create the Coin class, add a new file named Coin.swift and then enter the following code:

import SpriteKit 
 
class Coin: SKSpriteNode, GameSprite { 
    var initialSize = CGSize(width: 26, height: 26) 
    var textureAtlas:SKTextureAtlas = 
        SKTextureAtlas(named: "Environment") 
    var value = 1 
 
    init() { 
        let bronzeTexture = 
            textureAtlas.textureNamed("coin-bronze") 
        super.init(texture: bronzeTexture, color: .clear, 
            size: initialSize) 
        self.physicsBody = SKPhysicsBody(circleOfRadius:...