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

Geometrical primitives

When developing games, you will usually work with high-level elements, such as sprites, labels, particle systems, or physical bodies. But sometimes you will need to create simple shapes, such as circles, lines, rectangles. For example, you may need to do so to create a prototype for your next game.

SpriteKit provides us with a subclass of SKNode named SKShapeNode, which doesn't have much potential. This class allows us to create rectangles (init(rect:), init(rectOfSize:), init(rect:cornerRadius:), and init(rectOfSize:cornerRadius:)), ellipses (init(ellipseOfSize:) and init(ellipseInRect)), circles (init(circleOfRadius:)), and other types of shape by providing its vertices (init(points:count:)) or path (init(path:centered:)).

In this section, we are going to take advantage of this class in order to create a life bar, which will consist of a red rectangle in the background and a green rectangle in the foreground. This life bar will represent the main character's life points...