Book Image

Getting Started with SpriteKit

By : Jorge Jordán
Book Image

Getting Started with SpriteKit

By: Jorge Jordán

Overview of this book

SpriteKit is Apple’s game engine to develop native iOS games. Strongly boosted by the Apple Inc., Cupertino, it has increased in popularity since its first release. This book shows you the solutions provided by SpriteKit to help you create any 2D game you can imagine and apply them to create animations that will highlight your existing apps. This book will give you the knowledge you need to apply SpriteKit to your existing apps or create your own games from scratch. Throughout the book, you will develop a complete game. The beautiful designs implemented in the game in this book will easily lead you to learn the basis of 2D game development, including creating and moving sprites, and adding them to a game scene. You will also discover how to apply advanced techniques such as collision detection, action execution, playing music, or running animations to give a more professional aspect to the game. You will finish your first game by learning how to add a main menu and a tutorial, as well as saving and loading data from and to the player’s device. Finally, you will find out how to apply some mobile games techniques such as accelerometer use or touch detection.
Table of Contents (13 chapters)
Getting Started with SpriteKit
About the Author
About the Reviewer

2-star challenge: completing the tutorial

You may have realized that the tutorial reappears every time we rerun the game even if it has been completed previously. Now that we know how to store information on the device, let's take advantage of it in order to store information about whether the tutorial has been completed.


We will need a couple of new variables to support this new behavior. Therefore, add the following lines at the top of GameScene class:

private var isTutorialCompleted: Bool = false
private var kUserDefaultTutorialCompleted = "user_default_tutorial_completed"

We declared a Boolean variable that will act as a flag that represents the user's default value. We also declared a constant that will be used to identify the value of the desired user default.

This new flag will be initialized in initializeUserDefaults. So add the following block of code at the end of the aforementioned method:

if userDefaults.boolForKey(kUserDefaultTutorialCompleted) {
    isTutorialCompleted ...