Book Image

Swift Game Development - Third Edition

By : Siddharth Shekar, Stephen Haney
Book Image

Swift Game Development - Third Edition

By: Siddharth Shekar, Stephen Haney

Overview of this book

Swift is the perfect choice for game development. Developers are intrigued by Swift and want to make use of new features to develop their best games yet. Packed with best practices and easy-to-use examples, this book leads you step by step through the development of your first Swift game. The book starts by introducing Swift's best features – including its new ones for game development. Using SpriteKit, you will learn how to animate sprites and textures. Along the way, you will master physics, animations, and collision effects and how to build the UI aspects of a game. You will then work on creating a 3D game using the SceneKit framework. Further, we will look at how to add monetization and integrate Game Center. With iOS 12, we see the introduction of ARKit 2.0. This new version allows us to integrate shared experiences such as multiplayer augmented reality and persistent AR that is tied to a specific location so that the same information can be replicated on all connected devices. In the next section, we will dive into creating Augmented Reality games using SpriteKit and SceneKit. Then, finally, we will see how to create a Multipeer AR project to connect two devices, and send and receive data back and forth between those devices in real time. By the end of this book, you will be able to create your own iOS games using Swift and publish them on the iOS App Store.
Table of Contents (22 chapters)
Swift Game Development Third Edition
Contributors
Preface
Other Books You May Enjoy
Index

Adding the Power-up Star


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:

Adding the Star class

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 zany animation based on SKAction 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() { 
        let starTexture = 
textureAtlas.textureNamed("star") 
super.init...