Learn how to implement the UIKeyCommand to add keyboard shortcuts to classes like the UITabBarController and UICollectionView and use them in the simulator.

ExpressibleBy represents a series of protocols in the Swift Standard library that allows you to instantiate objects directly from token literals. Let's see how it works.

Apple recently introduced a new framework named CryptoKit at WWDC19, which makes generating hashes, encrypting data and verifying/authenticating data even easier. Previously, the only way to use cr...

iOS and macOS contain built in support for various ways to format dates, such as for human readable text and to show intervals between dates. At WWDC19, Apple added a new RelativeDateTimeFormatter,...

How to avoid getting killed by the OS.

Dependency injection makes unit testing possible and development easier. This post describes the process of preparing an app for dependency injection, as well as implementing three approaches to dependency injection: constructor injection, Swinject, and The…

Make your favourite Carthage frameworks static

Refer to this iOS tutorial and learn how to schedule and implement iOS background tasks in your iOS app development project. Get free source code inside.

Combine is a new framework by Apple introduced at WWDC 2019. The framework provides a declarative Swift API for processing values over…

In this short article we'll see how you can block and identify calls with call directory app extension.

One really interesting aspect of Swift’s overall design is how centered it is around the concept of value types. This week, let’s take a look at a few different ways in which we can make use of the semantics of value types — and how doing so could significantly…

What kind of types do you use to manage dependencies between objects in Swift? How do you keep your objects that depend on others testable? How do you prevent an addition of a method from causing changes to test code? Couplings should be loose, but how to…

Exploring iOS, SwiftUI & much more.

Learn how to design iOS app with layered architecture using Swift 5. We'll cover how Clean Architecture applies to iOS; clear up misconceptions about the so-called iOS architectures MVC, MVVM and MVP; study how to design business logic, user interface and…

Behavior<Context> is a hidden gem in the Quick testing framework. It was introduced silently in 2017 and it’s not even mentioned in the documentation! Here’s my PR which fixes that. The more I know about it the more I think this should be the way we write…

Unused images can be cleaned up using several free tools like LSUnusedResources and FengNiao. Learn how to use those tools and keep your projects clean.

Type Erasure explained through common use cases

Very often we can make a big impact on the quality of our code base by improving some of its more minor details. This week, let’s take a look at one technique for doing such local improvements, by refactoring large functions into dedicated, rule-based systems.