Book Image

Swift 3 Game Development - Second Edition

By : Stephen Haney
Book Image

Swift 3 Game Development - Second Edition

By: Stephen Haney

Overview of this book

Swift is the perfect choice for game development. Developers are intrigued by Swift 3.0 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. This book starts by introducing SpriteKit and Swift's new features that can be used for game development. After setting up your first Swift project, you will build your first custom class, learn how to draw and animate your game, and add physics simulations. Then, you will add the player character, NPCs, and powerups. To make your game more fun and engaging, you will learn how to set up scenes and backgrounds, build fun menus, and integrate with Apple Game Center to add leaderboards and achievements. You will then make your game stand out by adding animations when game objects collide, and incorporate proven techniques such as the advanced particle system and graphics. Finally, you will explore the various options available to start down the path towards monetization and publish your finished games to the App Store. By the end of this book, you will be able to create your own iOS games using Swift and SpriteKit.

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Table of Contents (20 chapters)
Swift 3 Game Development - Second Edition
Swift 3 Game Development - Second Edition
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
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 3
Setting up your development environment
Exploring the SpriteKit demo
Examining the demo code
Cleaning up
Summary
2
Sprites, Camera, Action!
Sprites, Camera, Action!
Sharpening our pencils
Checkpoint 2-A
Drawing your first sprite
Building a SKSpriteNode class
Adding animation to your toolkit
The story on positioning
Adding textures and game art
Designing for retina
Organizing your assets
Centering the camera on a sprite
Checkpoint 2-B
Summary
3
Mix in the Physics
Mix in the Physics
Laying the foundation
Renovating the GameScene class
Exploring the physics system
Checkpoint 3-A
Exploring physics simulation mechanics
Bee meets bee
Checkpoint 3-B
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
Checkpoint 4-A
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
Checkpoint 4-B
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
Adding a new enemy - the Mad Fly
Another terror - Bats!
Guarding the ground - adding the Blade
Adding the coins
Organizing the project navigator
Testing the new game objects
Checkpoint 5-A
Preparing for endless flight
Summary
6
Generating a Never-Ending World
Generating a Never-Ending World
Designing levels with the SpriteKit scene editor
Encounters in endless flying
Checkpoint 6-A
Spawning endless encounters
Spawning the Power-up Star at random
Turning bronze coins to gold
Checkpoint 6-B
Summary
7
Implementing Collision Events
Implementing Collision Events
Learning the SpriteKit collision vocabulary
Adding contact events to our game
Assigning categories to game objects
Preparing GameScene for contact events
Checkpoint 7-A
Player health and damage
Animations for damage and game over
Checkpoint 7-B
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
Checkpoint 8-A
Harnessing SpriteKit's particle system
Granting safety as the game starts
Checkpoint 8-B
Summary
9
Adding Menus and Sounds
Adding Menus and Sounds
Building the main menu
Adding the restart game menu
Checkpoint 9-A
Adding music and sound
Playing sound effects
Checkpoint 9-B
Summary
10
Standing Out in the Crowd with Advanced Features
Standing Out in the Crowd with Advanced Features
Adding fun crates to smash open
Recycling emitter nodes with particle pools
Checkpoint 10-A
Wiring up crate contact events
Adding a health crate
Smashing coin crates
Checkpoint 10-B
Summary
11
Choosing a Monetization Strategy
Choosing a Monetization Strategy
Developing your marketing plan
Leveraging crowdfunding
Showing display ads for revenue
Selling in-app purchases
Localization into foreign markets
Managing scope and completing projects
Summary
12
Integrating with Game Center
Integrating with Game Center
Registering an app with iTunes Connect
Creating a test user
Authenticating the player's Game Center account
Opening Game Center in our game
Checkpoint 10-A
Adding a leaderboard of high scores
Adding an achievement
Checkpoint 10-B
Summary
13
Ship It! Preparing for the App Store and Publication
Ship It! Preparing for the App Store and Publication
Finalizing assets
Designing the launch screen
Uploading our project from Xcode
Submitting for review in iTunes Connect
Summary

Adding a health crate

We have taken many steps to create our crate system. Now we can add our first crate: a crate in the GameScene class that will award health points to the player. Follow these steps to wire up the heart crate:

  1. In GameScene.swift, instantiate a new instance of the Crate class as a property of the GameScene:

            let heartCrate = Crate()

  2. At the bottom of the GameScene didMove function, add the heartCrate to the node tree and call the function that makes it award a heart:

            // Spawn the heart crate, out of the way for now 
        self.addChild(heartCrate) 
        heartCrate.position = CGPoint(x: -2100, y: -2100) 
        heartCrate.turnToHeartCrate()

  3. Locate the GameScene.didSimulatePhysics function. Find the code that spawns the power-up star. We can add on to this code to spawn our heart crate randomly after some encounters. Add the following code below the starRoll conditional (new code in bold):

            // Each encounter has a 10% chance...
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