preview in swiftui
Generated on 8/12/2024
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At WWDC 2024, several updates related to previews in SwiftUI were introduced. In the session titled "What’s new in Xcode 16," new APIs were highlighted that simplify the creation and management of previews. These include the previewable macro, which can be attached to property wrappers like state, allowing you to use them directly within a preview block. This eliminates the need for wrapper views and reduces boilerplate code. Additionally, the preview modifier API was introduced to make it easier to share environment or data for previews, enhancing reusability and performance by caching data.
Moreover, in the session "What’s new in SwiftUI," it was mentioned that Xcode Previews now have a dynamic linking architecture, which allows developers to switch between a preview and build and run without needing to rebuild the project, thus increasing iteration speed.
For more detailed information, you can refer to the session What’s new in Xcode 16 (02:49) and What’s new in SwiftUI (14:17).
What’s new in Xcode 16
Discover the latest productivity and performance improvements in Xcode 16. Learn about enhancements to code completion, diagnostics, and Xcode Previews. Find out more about updates in builds and explore improvements in debugging and Instruments.
What’s new in Quick Look for visionOS
Explore how Quick Look in visionOS can elevate file preview and editing experiences in your app. We’ll cover the integration of in-app and windowed Quick Look, as well as a brand-new API that customizes the windowed Quick Look experience in your app. We’ll also share the latest enhancements to viewing 3D models within Quick Look.
SwiftUI essentials
Join us on a tour of SwiftUI, Apple’s declarative user interface framework. Learn essential concepts for building apps in SwiftUI, like views, state variables, and layout. Discover the breadth of APIs for building fully featured experiences and crafting unique custom components. Whether you’re brand new to SwiftUI or an experienced developer, you’ll learn how to take advantage of what SwiftUI has to offer when building great apps.
Platforms State of the Union
Discover the newest advancements on Apple platforms.
What’s new in SwiftUI
Learn how you can use SwiftUI to build great apps for any Apple platform. Explore a fresh new look and feel for tabs and documents on iPadOS. Improve your window management with new windowing APIs, and gain more control over immersive spaces and volumes in your visionOS apps. We’ll also take you through other exciting refinements that help you make expressive charts, customize and layout text, and so much more.
Enhance your UI animations and transitions
Explore how to adopt the zoom transition in navigation and presentations to increase the sense of continuity in your app, and learn how to animate UIKit views with SwiftUI animations to make it easier to build animations that feel continuous.