10. Integrating with Game Center | Game Development with Swift

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Table Of Contents

Game Development with Swift

By : Stephen Haney

4.6 (14)

Game Development with Swift

4.6 (14)

By: Stephen Haney

Overview of this book

If you wish to create and publish fun iOS games using Swift, then this book is for you. You should be familiar with basic programming concepts. However, no prior game development or Apple ecosystem experience is required.

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

Are there any downsides to Swift?

Prerequisites

What you will learn in this book

Further research

Setting up your development environment

Creating our first Swift game

Summary

2. Sprites, Camera, Actions!

2. Sprites, Camera, Actions!

Sharpening our pencils

Checkpoint 2- A

Drawing your first sprite

The story on positioning

Adding textures and game art

Organizing your assets

Putting it all together

Centering the camera on a sprite

Checkpoint 2-B

Summary

3. Mix in the Physics

3. Mix in the Physics

Laying the foundation

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

Polling for device movement with Core Motion

Checkpoint 4-A

Wiring up the sprite onTap events

Teaching our penguin to fly

Improving the camera

Pushing Pierre forward

Checkpoint 4-B

Summary

5. Spawning Enemies, Coins, and Power-ups

5. Spawning Enemies, Coins, and Power-ups

Introducing the cast

Organizing the project navigator

Testing the new game objects

Checkpoint 5-A

Summary

6. Generating a Never-Ending World

6. Generating a Never-Ending World

Designing levels with the SpriteKit scene editor

Encounters in endless flying

Integrating scenes into the game

Checkpoint 6-A

Spawning endless encounters

Spawning the star power-up at random

Checkpoint 6-B

Summary

7. Implementing Collision Events

7. Implementing Collision Events

Learning the SpriteKit collision vocabulary

Adding contact events to our game

Checkpoint 7-A

Player health and damage

Collecting coins

The power-up star logic

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 heads-up display

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

Checkpoint 9-B

Summary

10. Integrating with Game Center

10. Integrating with Game Center

Registering an app with iTunes Connect

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

11. Ship It! Preparing for the App Store and Publication

11. Ship It! Preparing for the App Store and Publication

Finalizing assets

Finalizing iTunes Connect information

Uploading our project from Xcode

Submitting for review in iTunes Connect

Summary

Index

Index

Opening Game Center in our game

If the user is authenticated, we will add a button to the MenuScene class so they can open the leaderboard and view achievements from within our game. Alternatively, players can always use the Game Center app in iOS to view their progress.

Follow these steps to create a leaderboard button in the menu scene:

Open MenuScene.swift in Xcode.
Add a new import statement at the top of the file so we can use the GameKit framework:
```
import GameKit
```
Update the line that declares the MenuScene class so that our class adopts the GKGameCenterControllerDelegate protocol. This allows the Game Center screen to inform our scene when the player closes the Game Center:
```
class MenuScene: SKScene, GKGameCenterControllerDelegate {
```
We need a function that will create the leaderboard button and add it to the scene. We will call this function once the Game Center authenticates the player. Add a new function to the MenuScene class named createLeaderboardButton as shown here:
```
func createLeaderboardButton...
```

CONTINUE READING

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