Writing tests in iOS apps is a touchy subject. Not everyone is so privileged to be able to write tests full-time, for different reasons. Some people have full control over their development process and choose not to write tests, maybe because they have had a bad experience with it or

Iterating over design that needs to be reflected in code can be tedious and time-consuming. Typically the designer works in graphics editing software and then submits flat art to the developer who implements the design in code. Refining the design requires going through the same laborious process. Even harder if

Swift has very limited runtime support and no meta-programming features. I created a new tool that changes that, it's called Sourcery Using it offers many benefits: * Write less repetitive code and make it easy to adhere to DRY principle. * It allows you to create better code, one that

Even if we are writing pure Swift code in our app, we still deal with Objective-C Frameworks like UIKit. Let's take a look at how we can improve our MVVM architecture by leveraging a little bit of Objective-C runtime and Protocol Oriented Programming. Popular MVVM setup Pretty standard

As I open source another framework this week, I wanted to share few thoughts about building developer tools. Developers are lazy creatures, we like to automate stuff, we write scripts, use File Automation to get rid of repetitive work. One would think that we'd use the same principles

Many of us already write unit tests and run continuous integration servers, we can also leverage great tools like Danger to easily add some checks to the pull requests. If we'd like to prevent some common mistakes from appearing in the repo in the first place, we can

Logging is one of the rare cases when you could probably justify having a singleton, but with Swift Protocol Extension you don't need to. Let's integrate Logging in a way that: * Doesn't cause 3rd party dependencies to leak across your codebase * Hides the existence

I recently did a talk in Prague about iOS Application Architecture, you can watch it here.