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Once you start migrating to the Swift 6 language mode, you’ll most likely turn on strict concurrency first. Once you’ve done this there will be several warings and errors that you’ll encounter and these errors can be confusing at times. I’ll start by saying that having a solid understanding of actors, sendable, and data races […]

Once you start migrating to the Swift 6 language mode, you’ll most likely turn on strict concurrency first. Once you’ve done this there will be several warings and errors that you’ll encounter and these errors can be confusing at times. I’ll start by saying that having a solid understanding of actors, sendable, and data races […]

Once you start migrating to the Swift 6 language mode, you’ll most likely turn on strict concurrency first. Once you’ve done this there will be several warings and errors that you’ll encounter and these errors can be confusing at times. I’ll start by saying that having a solid understanding of actors, sendable, and data races […]

In an earlier article, I explained how variables are defined in Swift using let and var. Both constants (let) and variables (var) in Swift always have a type; it’s what makes Swift a strongly typed language. For example, we could define a String variable like this: // the compiler will know myString is a String […]

Once you start migrating to the Swift 6 language mode, you’ll most likely turn on strict concurrency first. Once you’ve done this there will be several warings and errors that you’ll encounter and these errors can be confusing at times. I’ll start by saying that having a solid understanding of actors, sendable, and data races […]

In Xcode 16, this error actually is sometimes presented as "Passing closure as a ‘sending’ parameter risks causing data races between code in the current task and concurrent execution of the closure". The cause is the exact same as what’s covered in this post. Once you start migrating to the Swift 6 language mode, you’ll […]

Environment values are a convenient way to pass data down a deep view hierarchy. We can add values to the environment ourselves, but the syntax is clunky and verbose. In this post you’ll learn about the built-in @Entry macro which makes adding new values a breeze.

let and var are two ways to declare properties in Swift. Let’s explore their uses, and how their behavior will change depending on where they’re used.

Xcode 16 and iOS 18 come with a feature that allows us to build elaborate preview environments using a new PreviewModifier protocol. This protocol allows us to define objects that can create a single context or environment that’s cached and used across your SwiftUI previews. This is useful because it means that you could, for […]

SwiftUI in iOS 18 and macOS 15 has gained a new trick; it can mix colors. This means that it’s now possible to take a color and modify it by applying another color to it using a provided percentage. The video below shows how this works: Notice how the large rectangle updates its color to […]