<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -",
    "tvOS: 15.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "GroupActivities",
  "identifier" : "/documentation/GroupActivities/GroupSessionEvent/url",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Group Activities"
    ],
    "preciseIdentifier" : "s:15GroupActivities0A12SessionEventV3url10Foundation3URLVSgvp"
  },
  "title" : "url"
}
-->

# url

The URL to open when the participant taps the event link in the system UI.

```
let url: URL?
```

## Discussion

When the user taps your custom event in the system UI, the system opens
the provided URL. Specify a universal link to open your app to the place
where the action occurred. If the value of this link is `nil`, the
system brings your app to the foreground.

For information about how to support universal links in your app, see <doc://com.apple.documentation/documentation/Xcode/supporting-universal-links-in-your-app>

---

Copyright &copy; 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)