SwiftUI idiomatic architecture or design for iOS SwiftUI app

To design an idiomatic architecture for an iOS app using SwiftUI, you should focus on the key principles of SwiftUI: declarative syntax, compositional views, and state-driven updates. Here are some insights from the "SwiftUI essentials" session at WWDC 2024:

1. Declarative Syntax: SwiftUI allows you to describe what your UI should look like, and it handles the rendering. This means you define views as value types using structs, which are efficient and easy to manage. This approach helps in reducing boilerplate code and potential update bugs.

2. Compositional Views: SwiftUI encourages breaking down your UI into small, reusable components. This compositional approach does not impact performance negatively, allowing you to organize your code in a way that makes sense for your app's architecture.

3. State-Driven Updates: SwiftUI automatically updates the UI when the underlying data changes. This is achieved through a state-driven model where views are updated based on changes in the data they depend on. This eliminates the need for manual UI updates and reduces the risk of bugs.

4. Platform Integration: SwiftUI provides platform-specific capabilities while maintaining a common set of components across all Apple platforms. This allows you to create apps that feel native to each platform while reusing a significant amount of code.

5. Scene-Based App Structure: An app in SwiftUI is defined by scenes, which are declarative structures similar to views. This structure supports multi-window capabilities on platforms like macOS and allows for the creation of custom widgets.

For more detailed guidance, you can refer to the SwiftUI essentials session, which covers built-in capabilities and how to leverage them across all platforms.