Book Image

Swift Game Development - Third Edition

By : Siddharth Shekar, Stephen Haney
Book Image

Swift Game Development - Third Edition

By: Siddharth Shekar, Stephen Haney

Overview of this book

Swift is the perfect choice for game development. Developers are intrigued by Swift 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. The book starts by introducing Swift's best features – including its new ones for game development. Using SpriteKit, you will learn how to animate sprites and textures. Along the way, you will master physics, animations, and collision effects and how to build the UI aspects of a game. You will then work on creating a 3D game using the SceneKit framework. Further, we will look at how to add monetization and integrate Game Center. With iOS 12, we see the introduction of ARKit 2.0. This new version allows us to integrate shared experiences such as multiplayer augmented reality and persistent AR that is tied to a specific location so that the same information can be replicated on all connected devices. In the next section, we will dive into creating Augmented Reality games using SpriteKit and SceneKit. Then, finally, we will see how to create a Multipeer AR project to connect two devices, and send and receive data back and forth between those devices in real time. By the end of this book, you will be able to create your own iOS games using Swift and publish them on the iOS App Store.
Table of Contents (22 chapters)
Swift Game Development Third Edition
Contributors
Preface
Other Books You May Enjoy
Index

Creating the health power-up 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 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 to spawn a star...