# handleUserActivity(_:) Responds to Handoff–related activity from complications and notifications. ``` optional func handleUserActivity(_ userInfo: [AnyHashable : Any]?) ``` ## Parameters `userInfo` The dictionary containing data about the activity. ## Discussion Use this method to respond to Handoff–related activity. WatchKit calls this method when your app launches as a result of a Handoff action. Use the information in the provided `userInfo` dictionary to determine how you want to respond to the action. For example, you might decide to display a specific interface controller. The default implementation of this method does nothing. When overriding this method, don’t call `super`. > Note: > If you are creating a SwiftUI app for watchOS 7 or later, use the modifier instead. ### Handling Activities from Complications and Notifications WatchKit calls this method when your app launches from a complication or notification. Update your app’s user interface based on the `userInfo` parameter. Your app should seamlessly continue the interaction from the complication or notification. When your app launches because the user tapped on a complication, the `userInfo` dictionary contains the key. The value is a Date object that indicates when the complication launched. ## See Also [`updateUserActivity(_:userInfo:webpageURL:)`](/documentation/WatchKit/WKInterfaceController/updateUserActivity(_:userInfo:webpageURL:)) Registers the current user activity with the system. --- 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)