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Testing completion handler APIs with Swift Testing

Published on: October 16, 2024

The Swift testing framework is an incredibly useful tool that allows us to write more expressive tests with convenient and modern APIs. This is my first post about Swift Testing, and I’m mainly writing it because I wanted to write about something that I encountered not too long ago when I tried to use Swift […]

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What is dependency injection in Swift?

Published on: October 11, 2024

Code has dependencies. It’s something that I consider universally true in one way or another. Sometimes these dependencies are third party dependencies while other times you’ll have objects that depend on other objects or functionality to function. Even when you write a function that should be called with a simple input like a number, that’s […]

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Mesh Gradients in SwiftUI explained

Updated on: July 7, 2025

With iOS 18, we have the possibility to create mesh gradients. Mesh gradients are a really nice way to create very cool UI effects. In this post, we’re going to explore exactly what mesh gradients are, how we can use them, and how we can even animate them to look really cool. We’ll start off […]

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Animating SF Symbols on iOS 18

Updated on: September 25, 2024

Over the years, Apple has been putting tons of work into the SF Symbols catalog. With SF Symbols, we’re able to leverage built-in iconography that will look familiar to users while also fitting into the Apple ecosystem very nicely. The fact that there’s thousands of symbols to choose from makes it a highly flexible and […]

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Solving “Value of non-Sendable type accessed after being transferred; later accesses could race;”

Published on: August 23, 2024

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 […]

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Setting the Swift Language mode for an SPM Package

Published on: August 21, 2024

When you create a new Swift Package in Xcode 16, the Package.swift contents will look a bit like this: // swift-tools-version: 6.0 // The swift-tools-version declares the minimum version of Swift required to build this package. import PackageDescription let package = Package( name: "AppCore", products: [ // Products define the executables and libraries a package […]

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Solving “Task-isolated value of type ‘() async -> Void’ passed as a strongly transferred parameter”

Published on: August 21, 2024

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 […]

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Solving “reference to var myVariable is not concurrency-safe because it involves shared mutable state” in Swift

Published on: August 15, 2024

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 […]

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Solving “Converting non-sendable function value may introduce data races” in Swift

Updated on: August 21, 2024

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 […]

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What are Optionals in Swift?

Published on: August 12, 2024

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 […]

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