what is swiftui | Ask WWDC

SwiftUI is Apple's declarative user interface framework designed to build apps across all of Apple's platforms. It allows developers to describe the UI they want, and SwiftUI takes care of the details like dark mode, dynamic type, and tracking changes in the model. This approach enables developers to share more code across different devices, making it easier to build apps that feel native on Apple's platforms with less code.

SwiftUI is easy to learn and packed with advanced features, making it suitable for both new apps and incremental adoption within existing ones. It integrates seamlessly with the underlying OS and other frameworks, providing interoperability with UIKit and AppKit. This means you can use SwiftUI alongside existing views and view controllers from these frameworks.

Some key features of SwiftUI include:

Declarative syntax for building user interfaces.
Seamless integration with UIKit and AppKit.
Support for animations, custom containers, mesh gradients, and scrolling customizations.
Interoperability with other frameworks like Swift Data and Swift Charts.

SwiftUI is used extensively within Apple's own apps and system experiences, such as Control Center, Notification Center, and Finder, as well as in apps like Music and Xcode.

For more detailed information, you can refer to the following sessions from WWDC 2024:

These sessions cover the fundamentals of SwiftUI, its capabilities, and how it can be used across different platforms.