# WatchKit integration Add WatchKit views to your SwiftUI app, or use SwiftUI views in your WatchKit app. ## Overview Integrate SwiftUI with your app’s existing content using hosting controllers to add SwiftUI views into WatchKit interfaces. A hosting controller wraps a set of SwiftUI views in a form that you can then add to your storyboard-based app.  You can also add WatchKit views and view controllers to your SwiftUI interfaces. A representable object wraps the designated view or view controller, and facilitates communication between the wrapped object and your SwiftUI views. For design guidance, see in the Human Interface Guidelines. ## Topics ### Displaying SwiftUI views in WatchKit [`class WKHostingController`](/documentation/SwiftUI/WKHostingController) A WatchKit interface controller that hosts a SwiftUI view hierarchy. [`class WKUserNotificationHostingController`](/documentation/SwiftUI/WKUserNotificationHostingController) A WatchKit user notification interface controller that hosts a SwiftUI view hierarchy. ### Adding WatchKit views to SwiftUI view hierarchies [`protocol WKInterfaceObjectRepresentable`](/documentation/SwiftUI/WKInterfaceObjectRepresentable) A view that represents a WatchKit interface object. [`struct WKInterfaceObjectRepresentableContext`](/documentation/SwiftUI/WKInterfaceObjectRepresentableContext) Contextual information about the state of the system that you use to create and update your WatchKit interface object. --- 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)