Adding a new enemy - the Mad Fly

Pierre Penguin will need to dodge more than just Bees to accomplish his goal. We will add a few new enemies in this chapter, starting with the MadFly class. The Mad Fly is quite grumpy, as you can see:

Adding the MadFly class

MadFly is another straightforward class; it looks a lot like the bee code. Create a new Swift file named MadFly.swift and enter this code:

import SpriteKit 
 
class MadFly: SKSpriteNode, GameSprite { 
    var initialSize = CGSize(width: 61, height: 29) 
    var textureAtlas:SKTextureAtlas = 
        SKTextureAtlas(named: "Enemies") 
    var flyAnimation = SKAction() 
 
    init() { 
        super.init(texture: nil, color: .clear, 
            size: initialSize) 
        self.physicsBody = SKPhysicsBody(circleOfRadius: 
            size.width / 2) 
        self.physicsBody?.affectedByGravity = false 
        createAnimations() 
        self.run(flyAnimation) &...