# init(hostingDelegateClass:) Creates a `UISceneSessionActivationRequest` customized to open a SwiftUI scene. ``` init?(hostingDelegateClass: D.Type) where D : UIHostingSceneDelegate ``` ## Parameters `hostingDelegateClass` A Class type that conforms to `UIHostingSceneDelegate`. ## Discussion The first scene declared in the `rootScene` property of your hosting delegate class will be activated by this request. ``` class HostingSceneDelegate: UIHostingSceneDelegate { static var rootScene: some Scene { WindowGroup() { ContentView() } } } let request = UISceneSessionActivationRequest( hostingDelegateClass: HostingSceneDelegate.self ) UIApplication.shared.activateSceneSession(for: request) ``` When a UIScene is activated using this request object, its configuration is managed by SwiftUI. You will not see a call to your app delegate’s `application(_:configurationForConnecting:options:)` method. An instance of the provided hosting delegate class will be created by SwiftUI and receive lifecycle callbacks for the associated scene. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)