Awesome Swift Playgrounds

A curated list of awesome Swift playgrounds.

Contributing

Please take a quick look at the contribution guidelines first. Thanks to all contributors; you rock!

If you see a playground here that does not work anymore with the current release of Xcode or is not a good fit, please submit a pull request to improve this file or consider updating it. Thank you!

Learning Swift

Some interesting playgrounds to learn Swift

Learn Swift - 30+ playgrounds that follow the "Language Guide" section of Apple's Swift book. 🌟
The Swift Programming Language Playgrounds - 40+ playgrounds, one for each chapter of Apple's Swift book. 🌟
Swift Reference Playground - Reference playground with basic language syntax and examples.
Swift Worksheets - Learn Swift by reading through and experimenting with playgrounds.
Swift Crash Course - A Swift crash course, with links explaining the language and a playground for each topic.
Swift-Introduction - Collection of playgrounds covering various aspect of the Swift language.
Swift2 by Playgrounds - Learn Swift 2.0 from playgrounds.
Swift Hack Pack - Collection of playgrounds that teaches Swift.
SwiftStandardLibraryPlaygrounds - A collection of playground demonstrating the use of the Swift Standard Library.
MPCS51030 UChicago iOS Course - Playgrounds from the 2015 iOS course of the University of Chicago.
The Swift Summary Book - A summary of Apple's Swift language. 🌟
Swifter Tips - Examples for every feature of the Swift language.

Learning Swift: Advanced Topics

Advanced topics, useful once you have mastered the basics of the language

A Swift Introduction to Core Data - Learn Code Data experimenting directly in this playground. 🌟
Swiftly Typed Resources - A playground showing how Swift makes Strings, Colors, Fonts, Images, etc easier to deal with.
TDDSwiftPlayground - Demonstration of using Swift Playgrounds in Test Driven Development with XCTest.
Swift DSL Example - Implementation of a DSL in Swift.
Swift KVO Closures - Swift KVO playground.
Swift Data Tutorial - Learn everythig about NSDate.
Swift And C - Examples about using C with Swift.
Swift Memory Management - How to avoid retain cycles, from this post.
Concurrency on iOS - Concurrency and Parallelism in iOS

Design Patterns

Design Patterns Playgrounds - Playground that show various traditional design patterns.
Design Patterns Playground - Learning GoF's Design Patterns in Swift 2.

Protocol Oriented Programming

Swift Diagram Playgrounds - Adaptation of the Protocol-Oriented Programming in Swift talk from WWDC 2015.
Swift Protocol Extensions - A playground to explore Protocol Extensions.
Battleship Example - An example of how to use Protocol Oriented Programming with the battleship game.

Functional Reactive Programming

ReactiveCocoa Playground - The easiest way to get a taste of ReactiveCocoa.
Swift Reactive Playground - Companion to the article: ReactiveCocoa made Simple With Swift.

Apple's Playgrounds

Playgrounds from Apple, usually presented at some WWDC

Apple's Mandelbrot Playground - A playground with the mandelbrot fractal (updated to Swift2 by @palmerc).
Apple's Balloons Playground - The balloons playground showed at WWDC14.
Interactive Playgrounds - Playground that presents the interactive playgrounds feature with a UIKit dynamics Newton's cradle. 🌟
Apple's Crustacean Playground - Protocol-Oriented Programming with Value Types
Apple's Swift Standard Library Playground - experiment with Swift standard library types and high-level concepts using visualizations and practical examples.

Playgrounds about Playgrounds

Playgrounds that describe what you can do with playgrounds

Interactive Playground - Exploring interactivity in Playgrounds in Xcode 7.3.
XCTest Playground - Better looking tests for playgrounds
Mondrian - Make iOS app mockups in Swift 2.x playgrounds.

Algorithms and Data Structures

Algorithms and data structures implemented in Swift

Learn about transducers - A little tutorial that explains transducers.
Swift Functors, Applicatives, and Monads in Pictures - Companion to the article: Swift Functors, Applicatves, and Monads in Pictures.
Functors in Swift - A playground to introduce Functors in Swift, and their practical usage.
DataStructures Playground - Data Structures and Algorithms in Swift.
Swiftography - Standard cryptographic algorithms in a Swift Playground.
Algorithms Playground - Various algorithm implementation in Swift.
Dynamic Programming With Swift - A set of three dynamic programming problems implemented in a Swift.
Swift Algorithm Club - Algorithms and data structures in Swift with explanations. 🌟
Sorting Experiments - Alluring experiments with sorting algorithms in Swift, sort of.
The Jelly Bean Problem - The Jelly Bean problem from Wait But Why.
Euclidean Strings - A playground leveraging ReSwift to generate Euclidean Strings

UIKit And Graphics

A list of playgrounds that demostrate various aspect of UIKit and other graphical frameworks

UIStackView Playground - Interesting examples of use of UIStackViews.🌟
Bezier Path Playgrounds - Some playgrounds to better understand UIBezierPaths.
RPClarity - Shows a technique for blurring an image behind the characters behind one or more UILabels.
Swift Clock - An animated clock in a swift playground.
Checkmark Button - Animated check mark button.
UIKit playground - Playgrounds to experiment interactively with UIKit views.
WatchKit Asset Playground - A swift playground for creating awesome animations for your WatchKit Apps.
Swift 2.0 Protocol Extension Example - Showing how to use Swift2 protocol extensions to render errors in UIViews and UIViewControllers without subclassing or creating classes.
Tinting - A small playground to demonstrate image tinting in UIKit.
Animated GIF Playground - Swift playground for generating animated GIFs.
Ray tracing Playground - A playground and a series of articles on ray tracing, see also part 2, 3, 4, 5 🌟
WWDC16 Logo Playground - Drawing the WWDC16 logo in a playground.
WWDC16 Typography 🇯🇵 - Draw a logo or any text with the WWDC16 ASCII texture.

###Core Image

Interpolation Playground - Playground demonstrating lerp, smooth step, Catcall-Rom and others!
CoreImage for Swift Playgrounds - Growing collection of CoreImage playgrounds from the upcoming book "CoreImage For Swift". 🌟
Image Processor - Implementing different image filter algorithms.

###Metal

METAL Playground - Apple Metal framework playground. 🌟
Metalbrot - Interactive playground that draws the Mandelbrot fractal with Metal. 🌟

Animations

iOS Animation Samples - Experiment with iOS animations. 🌟
Additive Animations - Experiment with multiple additive animations in Core Animation.
Core Animation Playground - Companion to Apple's Core Animation Programming Guide.
Duet-Inspired Trail Effect - How to get a Duet style trailing effect in SpriteKit.

SpriteKit

Sprite Kit Collisions - Demonstrates how to perform physics collision detection using Swift and Sprite Kit.
SceneKit Examples - Experiment with SceneKit and Swift.

Audio

Sounds and music

Bach Playground - A Simple Swift Playground that plays a brief piece by Bach with AVAudioEngine and AVMIDIPlayer.
PlayerNode Playground - Playground using AVAudioEngine with a playernode and effects to play an audio file. 🌟

Mathematics

Live math with playgrounds

Lindenmayer Systems - A Swift playground exploring Lindemayer systems.
Swift Accelerate - Using the Accelerate framework and Swift for Linear Algebra.
Swifty Mathematics - A collection of swift playground about mathematics.
Numerical Algorithms - Numerical argorithms playground from Ray Wenderlich.
Swift Natural Numbers - A playground for implementing the natural numbers and more concepts in number theory.

Libraries

Library tutorials, in a playground

Argo Playground - JSON decoding with Argo.
Parse Playground - Experimenting with Parse.com in Swift.
S3Uploader - A playground to upload images to AWS S3.
100 AudioKit Playgrounds - Audio synthesis and processing with AudioKit.
AIToolbox - A set of playgrounds showing machine learning algorithms, all implemented with pieces of the AIToolbox framework code.
Realm Swift Playground - A playground that demos the basic features of Realm in swift.

Playground Sets

Sets of playgrounds about various topics

Public Extensions - A set of useful extensions from @PublicExtension. 🌟
Sketchytech's Playgrounds - Various Playgrounds. 🌟
Parks And Recreation - Great collection of interesting playgrounds, for fun and for profit. 🌟
Swift fun playgrounds - A few playgrounds to showcase Swift peculiar features.
BradLarson's Playgrounds - Various playgrounds.
Dmikusa's Playgrounds - Playgrounds that show basic Swift, JSON parsing, sending HTTP requests and basic file IO.
Cananito's Playgrounds - Various playgrounds.
Mgrebenets's Playgrounds - Various playgrounds.
Uberbruns's Playgrounds - Various playgrounds.
URaimo's Playgrounds - My playgrounds, various topics.

Miscellaneous

What doesn't fit anywhere else, but still awesome

Turtle Playground - A playground with Logo-like commands. 🌟
Game Boards - Chess, checkers, tic-tac-toe, sudoku and many others in playground. 🌟
Swift Brainfuck - Brainfuck interpreter written in Swift using Playground.
Icon Creator - Create app icons on Swift playground.
StarWars Seals - Emblems from Star Wars in Swift playgrounds via CoreGraphics and UIViews
SwiftFiles - Save, Load and Delete files easily from within a Swift playground.
Register VM - A register-based VM in a Swift playground. 🌟
Earth photos - A slideshow of Earth photos taken by DSCOVR/EPIC 🌟

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