UPDATED: The Swift 3 Cheatsheet

Written by: Reinder de Vries, September 22 2016, in App Development

Swift Cheatsheet, iOS Development with Swift 3

Why learn by heart if you can cheat? Grab this cheatsheet for Swift 3, including common syntax for primitives, basic classes, closures, error handling and more!

Download the Swift 3 Cheatsheet (PDF)

Swift 3 has recently been released and it’s the first major open-source iteration of the popular programming language for the Apple ecosystem (iOS, tvOS, watchOS and macOS).

The language update introduced a few big changes, making this version of Swift the best yet. Including:

  • Omit needless words. No more stringByReplacingOccurrencesOfString ..., just replacingOccurences(of: ...!
  • Consistent use of English grammar for methods that return vs. change in-place.
  • No more NS prefix for basic classes – bye-bye NeXTSTEP!
  • Consistent lowerCamelCase for properties, methods and structs.
  • Together with the first point – all function arguments now have labels!

I seriously think v. 3 is the first real gamechanger since Swift’s initial launch. Read up on all changes, here.

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In This Cheatsheet…

Compared to the previous version of the cheatsheet, a lot has changed. It’s expanded, made clearer, upgraded and updated. Dare I say it’s the most Swifty edition yet?

Including syntax examples for:

  • Variables
  • Functions
  • Classes
  • Instances
  • Control flow
  • Loops
  • Conditionals
  • Strings
  • Optionals
  • Dictionaries
  • Arrays
  • Closures
  • Guard & Defer
  • Generics
  • Tuples
  • Error Handling

Download the Swift 3 Cheatsheet (PDF)

What’s Next?

Pin the cheatsheet to your desktop – don’t print it out – and use it for your next Swift project. Learning how to Swift? Use the cheatsheet to improve your expertise and retention of basic Swift concepts, and practice your skill.

Got an idea for the next version of the cheatsheet? Let me know in the comments!

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Written By: Reinder de Vries

Reinder de Vries is an indie app developer who teaches aspiring app developers and marketers how to build their own apps at LearnAppMaking.com. Since 2009 he has developed over 50 apps for iOS, Android and the web, and his code is used by millions of users all over the globe. When Reinder isn't building apps, he enjoys strong espresso and traveling.

Got a killer app idea?

Grab the App Toolbox 2017 to learn how to save time building your app,
and how to 10x your app installs in the App Store. With the toolbox, you'll immediately know how to move forward to build better, more profitable apps.

Get The App Toolbox

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