While there are a number of abstractions that we can create to be able to observe and communicate value changes — Swift comes built-in with a simple, yet powerful way to attach observations to any kind of non-lazy, stored property — appropriately named property…

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Today we are going to touch the completely new topic on my blog, and it is Unit Testing. Most of us heard about the pros of Unit Testing. I want to show how easily you can start with Unit Testing by covering your model layer. So let’s start with the definition.

When deadlines are tight and the product faces considerable changes, it's common for developers to make concessions in the project's quality to make sure it gets shipped in time. This leads to release anxiety - that stressful feeling where you're unsure if…

Downloading and uploading from the background with the URLSession API brings some common pitfalls, especially when combined with app extensions.

The delegate pattern is often used by a child view controller to communicate with its parent view controller, but it’s not the only way. A lesser used, but occasionally useful, alternate approach is the responder chain.

One of the “delightful” features of iOS is the almost imperceptible UI effects they add to give the illusion of depth. One of the most under-appreciated features is UIMotionEffect, which ties the device’s gyroscope to your views to make them adapt to how…

Starting with a simple Weather App that listed four cities, I am expecting while I ask Siri to tell me the weather of the city, Siri can…

When you write UI tests, you might often think they are too complicated and do not follow DRY principle. So, to tackle this issue, I would…

Let’s see how layout has improved — from manual layout, autoresizing masks and finally to Auto Layout. Learn more on Cartography & SnapKit, and how to abstract Auto Layout using the builder pattern.

Establishing a solid structure within a code base is often essential in order to make it easier to work with. This week, let’s take a look at a few different techniques for structuring the data that makes up our core models, and how improving that structure…

Ever wanted to learn how to reverse malware on Apple macOS? This is the place to start! Join us in this 3-part series on macOS reverse engineering skills.

Pure functions might seem like a mostly theoretical concept at first, but they have the potential to give us some very real, practical benefits — from increased reuse and testability, to more predictable code. This week, let’s take a look at how pure functions…

Functional programming has been a buzzword in Swift since its creation. This is an essential guide of all the fundamental of this powerful paradigm.

Good architectures result in apps that perform well and are easy to maintain. Here is our feedback on functional reactive architecture!

The main advantage that UICollectionView has over UITableView is that you have full control over its layout. If you are used to working with UITableView you can get up to speed with UICollectionView fast as a big part of the API looks quite familiar to that…