NSExtensionContext.DidBecomeActiveMessage
A message the system sends when the extension’s host app moves from the inactive to the active state.
Declaration
struct DidBecomeActiveMessageOverview
You can use this message to adjust your extension’s activity when the host app becomes active.
Observe this message with the identifier didBecomeActive, or specify its type directly to the addObserver(of:for:using:) method. The Subject of this message type is NSExtensionContext.
This message interoperates with the notification NSExtensionHostDidBecomeActive. 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.