What is Swift UI?

SwiftUI is a user interface toolkit introduced by Apple at WWDC 2019 that allows developers to design and build UIs for Apple platforms using Swift code. It provides a declarative Swift syntax to create user interfaces and aims to unify the development process across all Apple devices, including iPhone, iPad, Mac, Apple Watch, and Apple TV.

Some key features and characteristics of SwiftUI include:

Declarative Syntax: Instead of specifying the intricate details of how the UI should look and behave, with SwiftUI, you declare what you want, and the system will figure out how to achieve that. For example, instead of manually managing table views, cells, and delegates, you can simply declare a List and populate it with items.

Live Preview: With the integration in Xcode, developers can instantly see the output of their SwiftUI code in a live preview, allowing for quicker iterations and adjustments.

Data-Driven: SwiftUI heavily emphasizes data-driven design. With tools like @State, @Binding, @ObservedObject, and @EnvironmentObject, developers can create reactive UIs that respond to data changes.

Adaptive and Customizable: SwiftUI automatically adapts the UI to fit different devices and screen sizes. With modifiers, you can quickly customize or tweak elements.

Animation: Animations can be easily added with just a few lines of code. SwiftUI will handle the complexities of creating smooth, interruptible animations.