Fighting duplicate animation code in two easy steps — People sometimes come to me on the street and ask: “Mate, what are the two most important things that define the character of a mobile app?” And whenever that happens, I answer “oh boy, what a silly question. Everybody know that those are animations and code reusability!”. Incredible, huh? So…

Introducing TelegraphKit — It’s a well-known fact that app development (like any job) has its fair share of mundane tasks. Tasks like creating Legal pages, support screens, and settings screens, to name a few. Let’s talk about adding a Privacy Policy. Maybe you already have written it (great work!), now how are you…

Introducing DateBuilder — TL;DR? I’ve open sourced DateBuilder, a powerful date calculation library. Check out the README to see all the incredible stuff it can do. Apple’s Calendar API is amazing, it is. It’s quite obscure in some parts, true, and it requires quite a little bit of learning and adjusting, but it’s…

The best way to debug your local notifications — TL;DR? Check out our new Swift package, it helps you debug local notifications with ease and elegance. At my company we’ve had a few projects recently where we had to implement a sophisticated and sometimes quite complex local notifications system. It’s always tricky to get right, because there are always…

Most apps do it wrong. Learn how to stand out! — UIButton is one of the most loved and hated controls in UIKit. It’s central to pretty much any app out there, but it being one of the oldest UIKit classes, it sometimes feel quite awkward to use. In this article, we’ll explain how to make it not only look beautiful…

One simple trick to avoid unintentionally leaking your users private info — So imagine you have an app with a fairly simple model struct like this: struct User { var identifier: String var handle: String var name: String var dateOfBirth: Date var city: String } And to help you debug problems in your code, you have a remote-logging system that will send…

Ready for some property wrappers? — It’s been almost three years since I wrote ”Do you often forget [weak self]? Here’s a solution”, which luckily resonated with many people. I’ll do a short recap, but if you want a deeper understanding of the topic you can go ahead and read that article first. In short, the…

Stuck between UIKit and SwiftUI, many of us have a hard time finding the energy to push forward “I switched one of my side projects from SwiftUI to UIKit because that shit is not ready for prime time” Since SwiftUI was announced last summer, I talked to many, many of…

Let’s talk about closure-based delegation, retain cycles and generics — Read a 2020 follow-up to this story here: No more [weak self], or the weird new future of delegation Okay, so today’s post is about delegation and how we can make it better with Swift. Without further ado, let’s introduce a standard example of Cocoa-style delegation in Swift: First, we…