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.

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Table of Contents (22 chapters)
Swift Game Development Third Edition
Swift Game Development Third Edition
Contributors
Contributors
Preface
Preface
Other Books You May Enjoy
Other Books You May Enjoy
Free Chapter
1
Designing Games with Swift
Designing Games with Swift
Why you will love Swift
Prerequisites
What you will learn in this book
New in Swift 4.2
Setting up your development environment
Exploring the SpriteKit demo
Examining the demo code
Cleaning up
Summary
2
Sprites, Camera, Action!
Sprites, Camera, Action!
Preparing your project
Drawing your first sprite
Building a SKSpriteNode class
Animation—movement, scaling, and rotation
The story on positioning
Working with textures
Designing for Retina
Organizing art into texture atlases
Centering the camera on a sprite
Summary
3
Mix in the Physics
Mix in the Physics
Laying the foundations
Renovating the GameScene class
Physics bodies and gravity
Exploring physics simulation mechanics
Bumping bees into bees
Summary
4
Adding Controls
Adding Controls
Retrofitting the Player class for flight
Assigning a physics body to the player
Polling for device movement with Core Motion
Wiring up the sprite onTap events
Teaching our penguin to fly
Listening for touches in GameScene
Fine-tuning gravity
Spreading your wings
Improving the camera
Pushing Pierre forward
Tracking the player's progress
Summary
5
Spawning Enemies, Coins, and Power-Ups
Spawning Enemies, Coins, and Power-Ups
Introducing the cast
Locating and adding the art assets
Adding the Power-up Star
A new enemy - the Mad Fly
Another terror - Bats!
Guarding the ground with the Blade
Adding coins
Organizing the project navigator
Testing the new game objects
Preparing for endless flight
Summary
6
Generating a Never-Ending World
Generating a Never-Ending World
Designing levels with the SpriteKit scene editor
Building encounters for Pierre Penguin
Looping encounters for a never-ending world
Adding the Power-up Star at random places
Turning bronze coins into gold coins
Summary
7
Implementing Collision Events
Implementing Collision Events
Learning the SpriteKit collision vocabulary
Collision versus contact
Physics category masks
Using category masks in Swift
Adding contact events to our game
Assigning categories to game objects
Preparing GameScene for contact events
Viewing console output
Testing our contact code
Player health and damage
Animations for damage and game over
The Power-up Star logic
Summary
8
Polishing to a Shine – HUD, Parallax Backgrounds, Particles, and More
Polishing to a Shine – HUD, Parallax Backgrounds, Particles, and More
Adding a HUD
Parallax background layers
Using the particle system
Creating a SpriteKit particle file
Configuring the path particle settings
Adding the particle emitter to the game
Granting safety as the game starts
Summary
9
Adding Menus and Sounds
Adding Menus and Sounds
Building the main menu
Wiring up the START GAME button
Wiring up GameScene for game over
Informing the GameScene class when the player dies
Implementing touch events for the restart menu
Adding music with AVAudio
Playing sound effects
Adding Options to the Menu Scene
Summary
10
Standing out in the Crowd with Advanced Features
Standing out in the Crowd with Advanced Features
Adding crates to smash open
Creating the Crate particle effects
Recycling emitter nodes with particle pools
Wiring up crate contact events
Creating the health power-up crate
Spawning smashable crates that reward coins
Summary
11
Introduction to SceneKit
Introduction to SceneKit
Creating a Scene with SCNScene
Adding objects to the scene
Importing scenes from an external 3D application
Creating the hero class and physics
Adding an enemy and collision detection
Adding a SpriteKit overlay
Adding labels and buttons
Adding touch interactivity
Adding the Gameloop
Adding wall and floor parallax
Adding particles
Adding character animation
Summary
12
Choosing a Monetization Strategy
Choosing a Monetization Strategy
Developing your marketing plan
Leveraging crowdfunding
Showing display ads for revenue
Adding an AdMob Ad in the App
Selling in-app purchases
Adding In-App Purchases
Localization in foreign markets
Managing scope and completing projects
Summary
13
Integrating with Game Center
Integrating with Game Center
Authenticating the player's Game Center account
Opening Game Center in our game
Updating the leaderboard from the code
Adding an achievement
Summary
14
Introduction to Spritekit with ARKit
Introduction to Spritekit with ARKit
Requirements for the project
Creating an AR Spritekit project
Adding text and crosshair
Adding anchors at random locations
Adding custom sprite
Registering touch controls to remove game objects
Summary
15
Introduction to Scenekit with ARKit
Introduction to Scenekit with ARKit
Going through the basic Scenekit/ARKit project
Project setup and detecting a plane
Adding touches
Adding Game Objects
Adding Score and Gameover text
Finishing touches
Summary
16
Publishing the Game on the App Store
Publishing the Game on the App Store
Creating the Bundle ID for the app
Preparing the project
Create the App in the itunesconnect portal
Upload the App and submit for review
Summary
17
Multipeer Augmented Reality
Multipeer Augmented Reality
Multipeer connectivity framework overview
Creating the multipeer session class
Creating a UI for the app
Setting outlets and adding variables
Testing the application
Summary
Index
Index

Contributors

About the authors

Siddharth Shekar is a game developer and teacher with over 5 years of industry experience and 12 years of experience in C++ and other programming languages, and is adept at graphics libraries such as OpenGL and Vulkan and game engines such as Unity and Unreal. He has also published games on the iOS and Android App Stores.

Siddharth has also authored 4 books, including Mastering Android Game Development with Unity and Learning iOS 8 Game Development Using Swift, all published by Packt Publishing

He currently lives in New Zealand and is a lecturer in the Games Department at Media Design School. He teaches graphics programming and PlayStation 4 native game development, and mentors final year production students.

I would like to thank my parents for supporting me in everything that I choose to do. I would also like to thank Media Design School for encouraging me to continue working on this book. Finally, I would like to thank Packt Publishing for putting this book together and offering me the opportunity to write the book.

Stephen Haney has written two books on iOS game development. He began his programming journey at the age of 8 years on a dusty, ancient laptop using BASIC. He has been fascinated with building software and games ever since. Now well versed in multiple languages, he enjoys programming as a creative outlet the most. He believes that indie game development is an art form—an amazing combination of visual, auditory, and psychological challenges—rewarding to both the player and the creator.

He enjoyed writing this book and sincerely hopes that it directly furthers your career or hobby.

About the reviewer

Rafał Sroka is a Software Engineer with extensive expertise in iOS development, building-up mobile apps, QA and release process, API design, and complex software projects. He has worked on various high-value projects in Poland, Germany, and Switzerland. He prefers working in cross-functional start-up environments where fast delivery of well-written and tested code is crucial. He holds a Master's degree in Electronics and Telecommunications. In his free time, he's a dedicated rock climber and mountaineer. He is a doer.

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