When designing concurrent programs, correctness is always the most important factor, but you should also consider performance factors as well. Code that executes correctly under multiple threads, but slower than the same code running on a single thread, is hardly an improvement. In this post, I benchmark the overhead of…

Despite Apple’s promoting their new SwiftUI framework, there’re a lot of projects, based on the plain old UIKit framework. Nevertheless, even if this is the case, and you’re tied to UIKit, there’s nothing that gets in the way of adopting Combine. To leverage Combine pipelines with UIKit, the used UIKit…

Suppose our Combine-based app connects to an outdoor air temperature sensor, which pushes the temperature measurements at a constant rate. We want our app to show a dynamic diagram of the latest temperature readings, but we don’t need all history of them, rather only a certain number of the latest…

Intro Apple’s Combine, a reactive programming (RP) framework, was developed for heavy use and with achieving the maximum flexibility and performance in mind. Being deeply integrated with other proprietary components, at a low level, it is closed source. Combine generally won’t be that hard to start to use for those who…

Table of Contents Introduction UIAppearance technology? What is a theme in the first place? Theme model Theme manager Notifying via Observer Swift-y Target-Action for flexibility Turning into a shared component Wrap up Introduction For today’s apps support for both light and dark appearances that users can toggle between has become the standard. While the…