Advanced Swift Actors: Re-entrancy and Interleaving

Conceptually, they’re pretty simple: actors are reference-typed entities that enforce serial access to their methods and state. However, without understanding their nuances, it’s hard to know whether an actor is the right tool for the job or if you’re adding complexity. To help nurture your instinct for when to take an actor out of your toolbelt, I’m going to guide us through a use case that affects almost all apps: authentication. I’ll first explain the challenges of building an authentication service in your iOS app. We will use sequence diagrams to design exactly how our ideal system behaves. Next, I’ll briefly cover core Swift concurrency concepts, explain how actors work under the hood, and discuss what is meant by re-entrancy. Finally, I’ll bring these concepts together and demonstrate how we can use our knowledge of actors to implement an optimal authentication service in your iOS app. <a href="https://betterprogramming.pub/advanced-swift-actors-re-entrancy-and-interleaving-1ad9bfa81f58">Website</a>