I need a fundamental knowledge about SwiftUI

To gain a fundamental understanding of SwiftUI, you can start by exploring the "SwiftUI essentials" session from WWDC 2024. This session provides a comprehensive introduction to SwiftUI, Apple's declarative user interface framework used to build apps across all of Apple's platforms. Here are some key points covered in the session:

Declarative Syntax: SwiftUI uses a declarative syntax, allowing you to describe what you want in your user interface, and SwiftUI takes care of rendering it. This approach reduces the amount of code you need to write and helps you focus on the unique aspects of your app.
Compositional and State-Driven Views: Views in SwiftUI are compositional and state-driven. This means you can build complex interfaces by composing smaller views, and SwiftUI automatically updates the UI when the state changes, reducing boilerplate code and potential bugs.
Platform Integration: SwiftUI provides platform-idiomatic capabilities and integrates seamlessly with Apple's SDKs. It allows for incremental adoption, meaning you can integrate SwiftUI into existing apps without needing to rewrite the entire app.
Cross-Platform Capabilities: SwiftUI is designed to work across all Apple platforms, enabling you to share code and create native apps for iOS, macOS, watchOS, and more.
Interoperability: SwiftUI can interoperate with other frameworks like UIKit and AppKit, allowing you to leverage existing components and capabilities.

For a more detailed exploration, you can watch the SwiftUI essentials session, starting from the "Fundamentals of views" chapter. This will provide you with a solid foundation in understanding how SwiftUI works and how you can start building apps with it.