Avoid unnecessary steps in UITests with deep links — In the last article, we talked about deep links: what they are, how can they be set up and how they can be handled in our app. What we show was only one possible application, but they can be used in many other use…

Use deep links to navigate to the right screen in complex apps — When we browse the web, sometimes we click on a product, and we see the Amazon app opening exactly on the page of that product. Other times, after answering a friend on Messenger, we take a look at their profile, and the Facebook app opens directly on it. These are…

7 reasons why every software engineer should write articles — This article is my 100th article since I started, back in January 2020. It also marks another personal achievement: starting from January 2022, I’ll be working for Meta as a Software Engineer. I’m both excited and scared about this new adventure. To celebrate these milestones, I wanted to share what…

How to implement pervasive features without sweeping changes — When developing an app, there are non-functional requirements that may affect the whole codebase. Consider logging, for example. To inspect an error, we could need to add logs in many different components to track the current state and what the user was doing. Different concerns share the same pervasive characteristic…

How to use generics and value types to reduce boilerplate in previews and other protocol implementations — One of the most annoying things in iOS development when working with UIKit is the slow feedback loop between implementing a piece of UI and seeing it on screen. When developing with UIKit, especially when working with code-first UI, we have to write all our UI code, before we can…

5 steps to develop any feature — There are many ways to develop a new feature. The process starts with a product owner coming to the dev team with an idea. They usually have some user research and some data to sustain the idea, and after a brief discussion, everyone agrees on building the feature. Then, the…

Thread-safe resources testing and actors — When working on big apps, we often need to share data among different components. Whether they are modules or just screens, they could need to read and write data from the same source. This introduces a problem: if the same date structure is used in different threads, we need to…

Use CoreData from an SPM package — Recently, I’ve been helping pro bono the Fight the Stroke association in maintaining and improving the MirrorHR iOS app. Fight the Stroke is a no-profit association whose goal is to improve the lives of families where there are children affected by cerebral palsy. MirrorHR — Epilepsy Research Kit aims to…

How to keep your app state updated with SwiftUI views — Mutable state is the root cause of issues in several apps. It generates inconsistent states that lead to wrong displayed information or, in the worse case, to crashes. We face this problem when two different components use the same information with different representations and, if the user updates the information…