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Swift 3 Game Development

By : Haney

4.5 (6)

Swift 3 Game Development

4.5 (6)

By: 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.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Designing Games with Swift

1. 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!

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

Customer Reviews

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Retrofitting the Player class for flight

We need to perform a few quick setup tasks before we can react to player input. We will remove some of our older testing code and add a physics body to the Player class.

The Beekeeper

First, clean up the old bee physics tests from the last chapter. Open GameScene.swift, find didMove and locate the bottom two lines; one sets a mass for bee2, and the other applies an impulse to bee2. Remove these two lines:

bee2.physicsBody?.mass = 0.2 
bee2.physicsBody?.applyImpulse(CGVector(dx: -25, dy: 0))

Updating the Player class

We need to give the Player class its own update function. We want to store player-related logic in Player and we need it to run before every frame:

Open Player.swift and add the following function inside Player:
```
        func update() { } 
```

In GameScene.swift, add this code at the bottom of the GameScene class:

        override func update(_ currentTime: TimeInterval) { 
            player.update() 
        }

Perfect. The GameScene class will...

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