willRestoreState
Generated on 5/28/2025
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The concept of willRestoreState is related to state restoration in applications. In the context of WWDC, state restoration is discussed in the session titled "Tailor macOS windows with SwiftUI." In this session, it is explained that state restoration saves the size and position of windows when the app quits and reopens them automatically the next time the app launches. However, for certain windows, like an "about" window, you might want to disable this automatic restoration. This can be done using the restoration behavior scene modifier in SwiftUI.
For more details, you can refer to the session Tailor macOS windows with SwiftUI (05:13).
Tailor macOS windows with SwiftUI
Make your windows feel tailor-made for macOS. Fine-tune your app’s windows for focused purposes, ease of use, and to express functionality. Use SwiftUI to style window toolbars and backgrounds. Arrange your windows with precision, and make smart decisions about restoration and minimization.
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.
Extend your app’s controls across the system
Bring your app’s controls to Control Center, the Lock Screen, and beyond. Learn how you can use WidgetKit to extend your app’s controls to the system experience. We’ll cover how you can to build a control, tailor its appearance, and make it configurable.
Support semantic search with Core Spotlight
Learn how to provide semantic search results in your app using Core Spotlight. Understand how to make your app’s content available in the user’s private, on-device index so people can search for items using natural language. We’ll also share how to optimize your app’s performance by scheduling indexing activities. To get the most out of this session, we recommend first checking out Core Spotlight documentation on the Apple Developer website.
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.
Break into the RealityKit debugger
Meet the RealityKit debugger and discover how this new tool lets you inspect the entity hierarchy of spatial apps, debug rogue transformations, find missing entities, and detect which parts of your code are causing problems for your systems.