SwiftUI helps you build great-looking apps across all Apple platforms with the power of Swift — and as little code as possible. With SwiftUI, you can bring even better experiences to all users, on any Apple device, using just one set of tools and APIs.
What is new in Swift UI ?
Advanced app experiences and tools – Enhance your apps with new features, such as improved list views, better search experiences, and support for control focus areas. And gain more control over lower-level drawing primitives with the new Canvas API, a modern, GPU-accelerated equivalent of drawRect.
Accessibility improvements – Speed up interactions by exposing the most relevant items on a screen in a simple list using the new Rotor API. The current accessibility focus state, such as the VoiceOver cursor, can now be read and even changed programmatically. And with the new Accessibility Representation API, your custom controls easily inherit full accessibility support from existing standard SwiftUI controls.
SwiftUI improvements on macOS – New performance and API availability improvements, including support for multicolumn tables, make your macOS apps even better.
Always-On Retina Display support – On Apple Watch Series 5 and later, the Always-On Retina Display allows watchOS apps to stay visible, even when the watch face is dimmed, making key information available at a glance.
Widgets for iPadOS – Now widgets can be placed anywhere on the Home screen and increased to a new, extra-large widget size.
Xcode includes intuitive design tools that make building interfaces with SwiftUI as easy as dragging and dropping. As you work in the design canvas, everything you edit is completely in sync with the code in the adjoining editor. Code is instantly visible as a preview as you type, and any change you make to that preview immediately appears in your code. Xcode recompiles your changes instantly and inserts them into a running version of your app — visible, and editable at all times.
Drag and drop – Arrange components within your user interface by simply dragging controls on the canvas. Click to open an inspector to select font, color, alignment, and other design options, and easily rearrange controls with your cursor. Many of these visual editors are also available within the code editor, so you can use inspectors to discover new modifiers for each control, even if you prefer hand-coding parts of your interface. You can also drag controls from your library and drop them on the design canvas or directly on the code.
Dynamic replacement – The Swift compiler and runtime are fully embedded throughout Xcode, so your app is constantly being built and run. The design canvas you see isn’t just an approximation of your user interface — it’s your live app. And Xcode can swap edited code directly in your live app with “dynamic replacement,” a new feature in Swift.
Previews – You can now create one or many previews of any SwiftUI views to get sample data, and configure almost anything your users might see, such as large fonts, localizations, or Dark Mode. Previews can also display your UI in any device and any orientation.
SwiftUI provides views, controls, and layout structures for declaring your app’s user interface. The framework provides event handlers for delivering taps, gestures, and other types of input to your app, and tools to manage the flow of data from your app’s models down to the views and controls that users will see and interact with.
Define your app structure using the App protocol, and populate it with scenes that contain the views that make up your app’s user interface. Create your own custom views that conform to the View protocol, and compose them with SwiftUI views for displaying text, images, and custom shapes using stacks, lists, and more. Apply powerful modifiers to built-in views and your own views to customize their rendering and interactivity. Share code between apps on multiple platforms with views and controls that adapt to their context and presentation.
You can integrate SwiftUI views with objects from the UIKit, AppKit, and WatchKit frameworks to take further advantage of platform-specific functionality. You can also customize accessibility support in SwiftUI, and localize your app’s interface for different languages, countries, or cultural regions.
