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: moving lights

In this challenge, I want you to simulate the sun moving along the day so that you can see how we can treat lights as nodes. So, try to move the sun from left to right as the game moves forward.


To achieve this behavior, we are going to update the sun's position every time a wave finishes so that it will change gradually.

Let's start by calling a new method at the end of initializeWave:

// Update sun position

Implement this using the following lines of code:

func updateSunPosition() {
    // Move sun on the x coordinates
    sunLight.position.x += 10.0

    // Reset sun position if needed
    if sunLight.position.x >= view!.bounds.size.width + 65.8 {
        sunLight.position.x = -65.8

As you can see, we move the sun along the x coordinate by increasing its position by 10.0 every time a wave is initialized.

Also, we reset its position when sunLight.position.x achieves the last position on the right-hand side, as we want...