A message the system sends when the extension’s host app begins running in the background.
You can use this message in your extension to stop tasks and prepare for the system to suspend the extension.
Extensions receive only a short amount of time to perform any background work.
If you need more time to complete critical tasks, use the methods of the ``ProcessInfo`` class to request that time.
Observe this message with the identifier ``NotificationCenter/MessageIdentifier/didEnterBackground-5gdtk``, or specify its type directly to the `addObserver(of:for:using:)` method.
The ``NotificationCenter/MainActorMessage/Subject`` of this message type is ``NSExtensionContext``.
This message interoperates with the notification ``NSNotification/Name/NSExtensionHostDidEnterBackground``.
The system notifies observers of the message when the ``NotificationCenter`` posts the notification.
Similarly, the system notifies observers of the notification when it posts the message.
Converts a posted notification into this main actor message type for any observers.
To implement this method in your own `MainActorMessage` conformance, retrieve values from the ``Notification``'s ``Notification/userInfo`` and set them as properties on the message.
- Parameter notification: The posted ``Notification``.
- Returns: The converted `MainActorMessage` or `nil` if conversion is not possible.
get · iOS 26.0+
name
TypeScript
static get nameValue(): NSNotification_Name
Swift declaration
static var name: Notification.Name { get }
A optional name corresponding to this type, used to interoperate with notification posters and observers.
