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SwiftUI tips and tricks Paul Hudson    @twostraws    May 30th 2025 Updated for Xcode 16.4 SwiftUI is packed with powerful headline features, but there are also dozens of smaller tips and tricks that will help you write better apps. I’ve tried to summarize all the tips I’ve come across so far below, and where applicable I’ve also provided links to my more in-depth SwiftUI tutorials to help give you

SwiftUI by Example is the world's largest collection of SwiftUI examples, tips, and techniques giving you almost 600 pages of hands-on code to help you build apps, solve problems, and understand how SwiftUI really works. Also available as a download edition Introduction A brief explanation of the basics of SwiftUI Don’t panic! What is SwiftUI? SwiftUI vs Interface Builder and storyboards Frequentl

Swift 4.1 improves Codable with keyDecodingStrategy Snake case is now just a few keystrokes away. Swift 4.0 brought many great new features, including multi-line strings, better keypaths, and lots of improved dictionary functionality. But it also gave us Codable for the first time: by far the easiest, safest way to convert Swift objects into JSON and XML. However, Codable had one particular annoya

What's new in Swift 3.1 Paul Hudson    January 26th 2017    @twostraws Swift 3.1 is a small, backwards-compatible update to Swift 3.0, cleaning up a few advanced features in preparation for more serious changes coming when Swift 4.0 is announced in June. Although it took a lot of behind-the-scenes work to make these changes happen (see here and here if you'd like some detail), the end result for d

Learn SwiftUI and UIKit for free Whether you want to learn SwiftUI or UIKit, Hacking with iOS is a complete tutorial series written for Swift and iOS, taking you from beginner to advanced using hands-on projects. What you get You get all the UIKit projects and all the SwiftUI projects, 30+ hours of video, hands-on tests, and more – all completely free. What you don't get This free online edition d

Take Swift to the server Includes free updates for new Swift versions – click to read my update policy Building web apps in Swift lets you re-use the skills you've already mastered, while being faster and safer than other languages. This course teaches you everything you need to craft your own server-side APIs and websites, all using Swift. 100% SWIFT 5 Don't waste time with out of date tutorials

How to scan a barcode Swift version: 5.10 Paul Hudson    @twostraws    May 28th 2019 iOS supports barcode scanning out of the box, but to be honest it's not that easy to do. So, here's a complete UIViewController subclass that you can add to your Swift project and get immediate support with no hassle – all you need to do is update the found(code:) method to take some interesting action, then prese

How to generate haptic feedback with UIFeedbackGenerator Swift version: 5.10 Paul Hudson    @twostraws    February 7th 2020 iOS 10 introduced new ways of generating haptic feedback using predefined vibration patterns shared by all apps, thus helping users understand that various types of feedback carry special significance. The core of this functionality is provided by UIFeedbackGenerator, but tha

What's new in iOS 10 for developers Paul Hudson    June 13th 2016    @twostraws iOS 10 was announced at WWDC 2016, and introduces a huge range of changes for Apple developers who want to extend the system in various exciting ways. I've tried to summarize the key changes below so you can get started with them straight away, providing code where feasible. Note: you need to download Xcode 8 in order

What's new in Swift 3.0 Paul Hudson    June 13th 2016    @twostraws Swift 3.0 is changing pretty much everything, and your code will almost certainly refuse to build until you make the necessary changes. Seriously, if you thought the jump from Swift 1.2 to 2.0 was big, you ain't seen nothing yet. In this article I'm going to explain some of the most important changes with as many code examples as

What's new in Swift 2.2 Paul Hudson    21st March 2016    @twostraws Swift 2.2 is almost here, and cleans up a number of quirks, adds some missing features, and deprecates – perhaps controversially – some language features. This article goes over all the major changes, along with several minor ones, and gives you practical code examples so you can get up and running straight away. If you liked thi

Safari Content Blocking in iOS: a tutorial by example Paul Hudson    June 12th 2015    @twostraws How to write a content blocker extension in 10 minutes (and never see the Daily Mail again) Please note: this is a tutorial explaining how to make your own content blocker. If all you want to do is install a content blocker, click here for a step-by-step tutorial: How to install an ad blocker in Safar

What's new in iOS 9 for developers Paul Hudson    June 11th 2015    @twostraws If you already completed the entire Hacking with Swift coding series, you'll have watched Apple's WWDC15 keynote with as much excitement as I did. And yes: Swift 2 was announced along with iOS 9 and Xcode 7, so if you're keen to start learning then I'm here to help. So, while I'm busy updating the complete book, I wrote

Where the world learns Swift. With more free Swift tutorials than any other site, Hacking with Swift will help you learn app development with SwiftUI and UIKit. Search the site, or choose a learning path below. Start Learning Ready to take your first steps with app development? We have a massive curriculum that teaches Swift with both SwiftUI and UIKit using real-world projects – all free. GET STA