---
title: launchUserNotificationUserInfoKey
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsapplication/launchusernotificationuserinfokey
---

# launchUserNotificationUserInfoKey

A key that indicates your app was launched because a user activated a notification in the Notification Center.

## Declaration

```swift
class let launchUserNotificationUserInfoKey: String
```

## Discussion

Discussion The launchUserNotificationUserInfoKey key is an NSUserNotification object that is present in the userInfo dictionary of the didFinishLaunchingNotification notification if your app was launched because a user activated a notification in the Notification Center. To access the notification payload in the userInfo dictionary, you can use code like this: NSUserNotification *userNotification = [[myNotification userInfo]     objectForKey:NSApplicationLaunchUserNotificationKey];     if (userNotification) {         // The app was launched by a user selection from Notification Center.     }

## See Also

### Keys

- [launchIsDefaultUserInfoKey](appkit/nsapplication/launchisdefaultuserinfokey.md)