• 2024-04-15
When is Single Responsibility Principle helping us write better code?

How many responsibilities should a class have? As many as it needs! This is a common joke, but the reality often is far less amusing... How often do we encounter… “challenging” code annotated with "Do not change!!!" comments? Software development isn't rocket science. There are a few basic rules that most…

  • 2024-02-24
How to bundle assets in an iOS app?

Picture this: you're just dying to play a car racing game. After a quick scroll through the App Store you find the perfect one. It has cool graphics and some sweet retro cars to race. And it's even free! You're pumped, hit download and wait. Finally, you launch the game…

  • 2023-11-10
Why mobile apps need a good abstraction?

Imagine you’ve just implemented a nice feature. Cleanly separated UI from business logic, added some unit tests, etc. Surely, code review would be a formality. Instead, this insufferable Senior Dev requested that you wrap one of the services with abstraction. Surely, you’ve read somewhere that you should operate on abstractions…

  • 2023-08-09
How to implement scalable and testable SwiftUI navigation?

Although SwiftUI is a great framework, it’s not without its limitations. If you’ve ever had to implement a complex application, utilizing branching navigation flows, you probably know what I am talking about. Yes, navigation components in SwiftUI have been a constant source of headache…  An iOS 16 addition, the NavigationStack,…

  • 2023-06-09
How to test UIKit & SwiftUI views? Explained with memes.

The benefits of having an exhaustive automated tests suite are obvious to anyone who ever worked on an app for more than a few months. We’ve all seen what lack of code maintenance might do: duplication, hidden side effects, convoluted business logic. A project codebase is like a garden -…

  • 2023-05-01
How to implement universal networking module in Swift (pt.2)

Let’s pick up where we left off! So far in part 1 we’ve discussed how to make a universal and robust networking client. Now, let’s take a look at how we can make it even better. Arguably, the most important feature of any universal tool is extendibility. We cannot account…

  • 2023-04-10
How to implement universal networking module in Swift (pt.1)

What’s the first service you usually implement in an app? It’s either networking or storage, right? And when it comes to networking, what are your choices? Most people either operate on URLSession directly, leveraging its multiple APIs, or add a 3rd party library like Alamofire.  But there is also a…

  • 2023-03-21
Why should you KISS your SwiftUI views? Explained with memes

If you've been a software developer for a while, you've likely heard about the Keep it Simple, Stupid (KISS) design principle. It suggests that our systems should be implemented in the simplest way possible across all application layers: persistence, services, business logic, and the UI. For all non-user facing app…

  • 2023-02-11
How to implement app analytics the right way

Picture this: You're finishing up an iOS app, and there's only one feature left to implement - the analytics. The client's marketing team has chosen a reputable framework that should be straightforward to integrate. They've even supplied a document detailing which user actions require tracking. It could take a day…