Overview

Using Blocs on iOS isn't as straight forward as using it on Android. That's mostly because Kotlin and Swift have some fundamental differences and also because Objective-C sits in between the two languages as the "interface language". One of the culprits that made the integration in Swift difficult is the fact that:

Generics can only be defined on classes, not on interfaces (protocols in Objective-C and Swift) or functions https://kotlinlang.org/docs/native-objc-interop.html.

Kotlin Bloc uses generic types extensively and while some interfaces could be converted to abstract classes to better support iOS, the numerous extension functions that make Kotlin Bloc so powerful, still need to use generic types.

At least in SwiftUI the integration with blocs isn't too bad once we add some helper classes though.