Mobile Development on code.kiwi.com

Feature configuration with Swift macros

Mon, 15 Sep 2025 11:24:59 +0000

This article describes how we made the iOS app feature configuration system more ergonomic by using Swift’s macros. We take a framework with repetitive, hard-to-understand declarations and manual mocking and eliminate all of these weaknesses.

ObservableObject initialisation using Environment

Wed, 23 Aug 2023 13:22:30 +0000

For the purpose of this article, our ObservableObjects represent optional testable and mockable view models that drive the domain logic for some of the more complicated screens in our app.

A side note on the SwiftUI environment for following code examples: As our app is driven by feature-based modular architecture, we are using Environment instead of EnvironmentObjects for our modular dependencies. This approach has some disadvantages (for example not being able to fully use @Published properties), but in our case, the modularity aspect overweights these limitations.

Highlights from WWDC 2019

Wed, 26 Jun 2019 21:49:00 +0000

When asked to describe this year’s WWDC, words like “packed”, “massive”, and “overwhelming” come to mind. It seems that Apple has announced multiple years worth of development. The following are some of the most prominent features, but rest assured that this article could easily be ten times as long if one was to dig beneath the surface.

Guide to advanced UI tests on iOS

Wed, 15 May 2019 21:32:00 +0000

Image source

Let’s talk about tests for iOS today — especially about writing advanced UI tests using the XCTest framework.

Before we start, I’d like you to know I will skip all the preparations — such as creating a new test target and adding pods to test target since it’s something you should already know before reading this article. Guide to these settings can be found eg here. Also, as for the languages, we will be using mainly Swift and a bit of Objective-C.