How to implement a space shooter with SpriteKit and SWIFT - Part 6: Game Center integration

Adding Game Center integration

Welcome to part 6 of my swift programming tutorial. In the previous parts we've created sprites, added movement, created enemies which follow our sprite, added bullets, a HUD, collision detection, sound and particle effects. Today I'll show how to integrate Game Center to add a global leaderboard.

The most complex part is doing configuration stuff in iTunes Connect. 3 from 4 steps of this tutorial are related to that. You need a paid Apple Developer Account to execute the next steps:

• Upload our App to iTunes Connect  
• Create a Leaderboard in iTunes Connect 
• Create a Sandbox Test User in iTunes Connect
• Coding 

How to implement a space shooter with SpriteKit and SWIFT - Part 5: Particles and Sound

Adding particles and sound 

Welcome to part 5 of my tutorial series. In the previous parts we've created a sprite, added movement, created enemies which follow our sprite, added bullets, a HUD, collision detection, .... 
But, for a real game some important elements are missing to beautify the game:

• Sound effects: explosions, game over, ...
• Particle effects: explosions, background star field 

I'll show how to implement this today. As a starting point you can download the code from tutorial part 4 here. 

How to implement a space shooter with SpriteKit and SWIFT - Part 4: Collision Detection

Adding basic game logic and collision detection

Welcome to part 4 of my tutorial series. In the previous parts we've created a sprite, added movement, created enemies which follow our sprite, added bullets and a HUD. But, for a real game some essential parts are missing:

• Collision detection between the bullets and our sprite
• Basic game logic
• Scoring
• Pause
• Life Lost & Game Over

I'll show how to implement this today. As a starting point you can download the code from tutorial part 3 here. 

How to implement a space shooter with SpriteKit and SWIFT - Part 3: Create a HUD

Adding a HUD with SpriteKit and SWIFT

Tutorial Overview:

• Part 1: Initial project setup, sprite creation and movement using SKAction and SKConstraint

• Part 2: Adding enemies, bullets and shooting with SKAction and SKConstraint

• Part 3: Adding a HUD with SKLabelNode and SKSpriteNode

• Part 4: Adding basic game logic and collision detection

• Part 5: Adding particles and sound 

• Part 6: GameCenter integration

• Part 7: iAd integration

• Part 8: In-App Purchases

Add the HUD:

I'll add a simple HUD which shows the score, the remaining lifes and a pause button. As a starting point you can download the code from tutorial part 2 here. 

First of all let's fix a bug in the sample code of my last post. Open GameViewController.swift and move the code from viewDidLoad to viewDidAppear. This is necessary because the orientation change to landscape might not be completed. In this case width and height are inverted, if we determine them in viewDidLoad:

How to implement a space shooter with SpriteKit and SWIFT - Part 2

Adding enemies, bullets and shooting with SKAction and SKConstraint

Tutorial Overview:

• Part 1: Initial project setup, sprite creation and movement using SKAction and SKConstraint

• Part 2: Adding enemies, bullets and shooting with SKAction and SKConstraint

• Part 3: Adding a HUD with SKLabelNode and SKSpriteNode

• Part 4: Adding basic game logic and collision detection

• Part 5: Adding particles and sound 

• Part 6: GameCenter integration

• Part 7: iAd integration

• Part 8: In-App Purchases

Add the enemies:

I'll add several enemy sprites. These will automatically follow and orient to the hero sprite.  You can download the code from Part 1 here.

How to implement a space shooter with SpriteKit and SWIFT - Part 1

Initial project setup, sprite creation and movement using SKAction and SKConstraint

Tutorial Overview:

• Part 1: Initial project setup, sprite creation and movement using SKAction and SKConstraint

• Part 2: Adding enemies, bullets and shooting with SKAction and SKConstraint

• Part 3: Adding a HUD with SKLabelNode and SKSpriteNode

• Part 4: Adding basic game logic and collision detection

• Part 5: Adding particles and sound 

• Part 6: GameCenter integration

• Part 7: iAd integration

• Part 8: In-App Purchases

1. Create a new universal project (template: game; language: Swift)

Writing games is more fun than writing a blog post: New teaser video for my upcoming tutorial

Sorry, I love writing blog posts, but this time I have written a small game instead of completing my tutorial. Here's another short teaser video:

That's all for today. The complete code will be available at GitHub soon.

Cheers,
Stefan

Follow @StefanJosten