Contents

addObserver(of:for:using:)

Adds an observer to a center for messages delivered on the main actor with a given subject and identifier.

Declaration

func addObserver<Identifier, Message>(of subject: Message.Subject.Type, for identifier: Identifier, using observer: @escaping @MainActor (Message) -> Void) -> NotificationCenter.ObservationToken where Identifier : NotificationCenter.MessageIdentifier, Message : NotificationCenter.MainActorMessage, Message == Identifier.MessageType

Parameters

  • subject:

    The metatype to observe all values for a given type.

  • identifier:

    An identifier representing a specific message type.

  • observer:

    A closure to execute when receving a message.

Return Value

A token representing the observation registration with the given notification center.

See Also

Observing concurrency-safe notifications