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Latest Articles

The Best Swift and iOS conferences in 2020

COMMUNITY

The Best Swift and iOS conferences in 2020

Our community has a huge number of awesome conferences around the world, so regardless of where you live there's usually a conference nearby. Of course, there are also many conferences far away too, so if you want to combine learning Swift with some sightseeing it's a double win!

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What’s the difference between map(), flatMap() and compactMap()?

CODE

What’s the difference between map(), flatMap() and compactMap()?

Swift gives us map(), compactMap() and flatMap() methods, but although they might sound similar they do very different things. So, in this article we’ll look at map() vs compactMap() vs flatMap() to help you understand what each one does and when it’s useful.

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How to use Core Image filters the type-safe way

CODE

How to use Core Image filters the type-safe way

iOS 13 introduced new type-safe initializers for Core Image filters that allow us to use them much more easily – and without having to hope that our code works at runtime. Previously much of Core Image was stringly typed, meaning that we would create filters using strings, which in turn meant that Swift couldn't be sure that when we asked for a value to be set that it would actually exist. iOS 13 replaces that with a much better implementation, and you'll never want to go back to the old way.

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Latest Example Code

system

Availability: iOS 12.0+

How to group user notifications using threadIdentifier and summaryArgument

system

Availability: iOS 2.0+

How to convert dates and times to a string using DateFormatter

system

Availability: iOS 2.0+

How to make one operation wait for another to complete using addDependency()

system

Availability: iOS 8.0+

How to convert between camel case and snake case with Codable and keyEncodingStrategy

networking

Availability: iOS 11.0+

How to make a network request wait for an internet connection using waitsForConnectivity

uikit

Availability: iOS 8.0+

What’s the difference between leading, trailing, left, and right anchors?

xcode

Availability: iOS 13.0+

How to set the clock in the iOS Simulator

system

Availability: iOS 8.0+

How to check whether one date is similar to another

testing

Availability: iOS 13.0+

How to benchmark app launch time using XCTOSSignpostMetric.applicationLaunch

core-haptics

Availability: iOS 13.0+

How to detect whether haptic event playback is supported

uikit

Availability: iOS 13.0+

How to disable undo, redo, copy, and paste gestures using editingInteractionConfiguration

accessibility

Availability: iOS 13.0+

How to help VoiceOver read specific kinds of text using accessibilityTextualContext

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We have thousands of questions and challenges to test your knowledge at every point along the way, ensuring you can apply what you've learned.

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It's not enough just to follow tutorials, which is why we get you writing your own apps as fast as possible – all with careful guidance and support.

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The vast amount of free content on Hacking with Swift is supported through the sale of books and courses that teach a wide range of more advanced topics. So, when you're ready to take your skills further check out the books below – and thank you for your support!

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HACKING WITH iOS Start learning Swift 5.1 with either UIKit or SwiftUI, with exclusive extra content available in the download edition.

Level: Beginner – Intermediate

Read for free Buy Download

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SWIFT IN SIXTY SECONDS Want to get started with Swift, but find yourself short on time? This course teaches you the fundamentals of Swift programming in 60-second chunks.

Level: Beginner

Read for free Buy Download

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PRO SWIFT Watch advanced videos that will level up your Swift knowledge: functional programming, protocol-oriented programming, value types, closures, operator overloading, and more.

Level: Intermediate - Advanced

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SWIFT DESIGN PATTERNS Learn smart, idiomatic techniques to design great Swift apps, from using MVC effectively through to MVVM, delegation, protocols, and more.

Level: Intermediate - Advanced

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TESTING SWIFT If you're serious about writing great code, you need to be serious about writing great tests. Testing Swift is designed to guide you through unit tests, UI tests, TDD, and much more!

Level: Intermediate

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SWIFT CODING CHALLENGES Work through real Swift coding problems that help strengthen your skills – perfect for finding and filling holes in your Swift knowledge, and preparing for iOS interviews.

Level: Intermediate - Advanced

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PRACTICAL iOS 12 Build powerful real-world projects using Apple's latest iOS – there is no faster way to get up to speed.

Level: Intermediate - Advanced

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Advanced iOS: Volume One book cover.

ADVANCED iOS: VOLUME ONE Build awesome, real-world projects using APIs introduced in iOS 10, and learn about speech transcription, SiriKit, iMessage apps, the new rich media notifications, and more.

Level: Intermediate - Advanced

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ADVANCED iOS: VOLUME TWO Build powerful real-world projects using powerful technologies like Core ML, ARKit, PDFKit, drag and drop, Core NFC, and more.

Level: Intermediate - Advanced

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DIVE INTO SPRITEKIT Learn to build high-performance games for iPad with a unique twist: you get to choose what should happen in each game. It's your game – you decide!

Level: Beginner

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HACKING WITH macOS Power up your desktop by learning to build macOS apps – I'll teach you everything you need to know, while helping you build real-world projects that take full advantage of macOS.

Level: Beginner – Intermediate

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HACKING WITH watchOS Build powerful, useful apps for Apple's tiniest devices – this book gives you everything you need to make great apps that quite literally never leave your user's side.

Level: Beginner – Intermediate

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HACKING WITH tvOS Build for the biggest screen of all – take full advantage of the Siri remote and build incredible apps and games using UIKit, SpriteKit, and more!

Level: Beginner – Intermediate

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SERVER-SIDE SWIFT Transfer your Swift skills to the server and learn to build awesome web apps, APIs, and websites all using Swift.

Level: Beginner - Intermediate

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Objective-C for Swift Developers book cover.

OBJECTIVE-C FOR SWIFT DEVELOPERS Round out your iOS coding knowledge with Apple's original language – this whole book has been designed to teach you Objective-C as quickly as possible by building on your Swift skills.

Level: Advanced

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Beyond Code book cover.

BEYOND CODE Learn the meta skills you need to be a better coder: regular expressions, Unix command line tools, Git source control, Scrum project management, and more.

Level: Beginner

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Hacking with Swift videos.

VIDEOS Buy recordings of online video workshops that teach specific advanced topics, all in 1080p high definition – it's an incredibly convenient way to learn.

Level: Intermediate – Advanced

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MERCHANDISE Buy some Swift-themed gifts for yourself or your favorite programmer friend and you'll learn Swift faster. Probably.

Level: All

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“The projects in this course are created in a way to expose you to real-world code – very practical and extensible! Highly recommended.”

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“Just finished reading Swift Design Patterns. It's awesome, just like other books by Paul. It helped me a lot to understand some iOS aspects deeply.”

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“Paul's is a warranty of quality. He writes books at a speed that always surprises me for its timing and effectiveness. This book represents all that!”

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“I'm a huge fan of Paul Hudson – more than an in-depth source of technical information, its super easy to understand and learning from him is inspiring!”

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“Paul Hudson is a Swift community treasure. I regularly turn to Pro Swift and Paul's other books for reference and inspiration. Thank you!”

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“The entire Hacking with Swift series is great! Swift Coding Challenges forces me to think abstractly and dig into the code more than ever.”

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“Paul's book does an amazing job teaching beginners how to use server-side Swift in an effective, testable, efficient way.”

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“Everything that you need, nothing that you don't. Paul does a great job of explaining even the most advanced concepts in an easy to understand manner.”

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Hello, my name is Paul and I think Swift is awesome.

About Me

My name is Paul Hudson, and I wrote Hacking with Swift to help you learn to make apps for iOS, macOS, watchOS, and more.

On this site you can find my free Swift tutorials, lots of other awesome Swift books I wrote, a huge collection of Swift example code, plus Swift news, tips, and tutorials to help take your learning further.

I've already helped thousands of people to learn Swift coding, and I'd love to help you too. Feel free to get in touch if you have questions – you can email me at paul@hackingwithswift.com or tweet me @twostraws.

Want to know more about me? Click here.