On iOS, the layout of a view hierarchy is expressed dynamically using the Auto Layout constraint system. Thus a view hierarchy can adapt itself to all the possible device screens sold by Apple. Auto Layout takes care to translate all the constraints into…

On the previous post, we discovered a mysterious CATransaction.commit at the bottom of our interrupted layout phase stack. Let’s find out its role in the layout process.

On the previous post, we discovered that the commit of the current implicit transaction is responsible of our initial interrupted layout phase. So we only have one question left: when does it take place?

Swift actors are a powerful tool to address data races and make your code thread-safe

Localizing your app is a big part of making it more inclusive and available to people in other languages. Apple has made it easier for developers to localize our apps. Starting with Xcode 15 and String Catalogs.

Adding @resultBuilder in Swift 5.4 was important, but you might have missed it. It’s the secret engine behind the easy syntax you use to describe a view’s layout: @ViewBuilder. If you’ve ever wondered whether you could create custom syntax like that in your…

Notes from my WWDC23 SwiftData lab.

The fifth iteration of the SwiftUI framework brings a lot of new APIs related to ScrollView, making it much more powerful than before. This week will begin the series of posts about new abilities of the ScrollView in SwiftUI, and we will start with scroll…

How, why and when to define version-specific manifests for your Swift Packages.

This is another huge year of updates, delivering many highly requested features such as advanced scroll view effects, container relative sizing, and even Metal shaders.

The HIG contains guidance and best practices that can help you design a great experience for any Apple platform.

In December of 1979 Tyrgve Reenskaug, an employee of Xerox PARC, published a paper called MODELS-VIEWS-CONTROLLERS about a design pattern he had invented for developing applications with a graphica…

Accessibility labels, hints, and grouping are great, but don’t forget to think about Voice Control too.

So many new SwiftUI APIs from W.W.D.C. 23. Here's a neat one that I've written myself previously, a modifier for relative frame sizing.

Meet the ButtonRepeatBehavior, a brand new view modifier in SwiftUI that allows to repeat a button's action on long press events.

During WWDC 2023 Apple announced that the `AppIntents` framework can now also be used to create Widget configurations. Since last year's announcement of `AppIntents` I was looking forward to also configuring Widgets with AppIntents. Now it's here and...

This article will introduce these new features of ScrollView in SwiftUI 5, hoping to help developers in need more and earlier.

In iOS 17, you can animate SF Symbols with the new modifier. Let's learn how to do it.

The plain button style has behavior and appearance different from the other styles. Let's learn how this affects a tappable area.

Store Xcode bookmarks to important code references and search queries. Use the bookmarks as a to-do list to increase your productivity.