pattern in swiftui

SwiftUI is a powerful framework for building user interfaces across all Apple platforms. It is built on three core principles: declarative syntax, compositional design, and state-driven updates.

Key Patterns in SwiftUI

1. Declarative Syntax: SwiftUI allows you to describe what your UI should look like, and it takes care of rendering it. This means you define the desired state of the UI, and SwiftUI updates the view hierarchy accordingly. This is different from imperative UI frameworks where you manually update the UI.

2. Compositional Design: SwiftUI encourages breaking down your UI into small, reusable components. This is achieved through view composition, where complex UIs are built by combining simpler views. For example, a List can be composed of multiple Text views, and custom views can be created and reused throughout your app.

3. State-Driven Updates: SwiftUI automatically updates the UI when the underlying state changes. This is managed through property wrappers like @State and @Binding, which allow views to react to changes in data. This eliminates the need for manual UI updates and reduces bugs related to state management.

4. Adaptive Views: SwiftUI views are designed to adapt to different contexts and styles. For example, buttons and toggles can automatically adjust their appearance based on the platform and context they are used in, such as in menus or forms.

5. Platform-Specific APIs: While SwiftUI provides a common set of components across platforms, it also includes platform-specific APIs to take advantage of unique features, such as the digital crown on watchOS.

For more detailed insights, you can refer to the session SwiftUI essentials (13:06) which covers built-in capabilities and adaptivity in SwiftUI.