pfw-observable-models

To separate Swift logic from SwiftUI views, you extract business logic and behavior into dedicated, testable classes using the @Observable macro. This decouples functionality from UI components, making your codebase easier to understand, maintain, and unit test.

The best way to refactor embedded data fetching logic is moving it into an isolated observable model class. This externalizes functionality from your UI components, supporting asynchronous operations and dependency injection within a clean, testable architecture.

Yes, you can use the @Observable macro with asynchronous operations and dependency injection. The approach organizes Swift logic into dedicated classes that explicitly support these patterns, ensuring complex behavior remains isolated and fully testable.

Decoupling logic into observable models works for SwiftUI, UIKit, and AppKit. By moving behavior out of UI components into isolated classes, you achieve a cleaner separation of concerns across different platforms while improving code readability.

You should move business logic out of UI components because managing complex Swift behavior directly within UI code makes it difficult to understand, maintain, and test. Externalizing this logic into observable classes creates a cleaner architecture.

You should avoid observable models when your UI component contains only trivial, static logic that lacks complex behavior or asynchronous operations. If there is no substantial business logic to test or decouple, introducing an isolated model class adds unnecessary architectural overhead.