A modern approach to application architecture in SwiftUI

This week, let’s take a look at a few core language features that enable us to design really lightweight APIs in Swift, and how we can use them to make a feature or system much more capable through the power of composition.

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How I went from manually testing my frameworks to having hundreds of unit tests and multiple automatic checks running on every change

I recently modified one of my apps, Conjugar, to use SwiftUI rather than UIKit for its settings screen. I hereby present, for the reader’s edification and enjoyment, some observations and learnings from this process. I cover: Spurious reasons not to...

At Just Eat we have experimentation and feature flagging at our heart and we've developed a component, named JustTweak, to make things easier on iOS.

Combine is one of the new frameworks released during WWDC 2019. It provides a declarative Swift API for processing values over time. Today we will talk about one of the hidden features of SwiftUI views, which is onReceive modifier. It allows views to subscribe…

Here I’m going to give you some tips about how to use SwiftLint in existing or new projects with four steps helping you in setup SwiftLint…

Make your app look even more professional

Not ready for SwiftUI yet? We can do so much in code and remove Storyboards

Let’s take a look at a few different ways to add plugin support to a type or library, and how doing so can enable a system to become a lot more decoupled and flexible.

Learn everything about Swift property wrappers: how to implement a property wrapper in Swift 5; how to access a property wrapper, its wrapped value and projection; how property wrappers are synthesized by the Swift compiler; discover practical examples of…

Let's build Messages.app's sticker peel-off animation with SceneKit.

In this tutorial, you’ll learn how to use the Vision framework in iOS to perform saliency analysis and use it to create an effect on a live video feed.

Let’s discover different limitations of the Functional Reactive Programming in iOS. Sometimes ReactiveX/RxSwift can harm you…

Learn how to use UserDefaults in Swift 5 with code examples. When to use UserDefaults in Swift? What kind of data should we put to UserDefaults? How user defaults are implemented internally? How to observe value changes in user defaults? And build type-safe…

Why most unit testing is a waste in Swift and how to extract the most value from tests