Applies a closure to create a subject that delivers elements to subscribers.
SDKs
- iOS 13.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
- Xcode 11.0+
Framework
- Combine
Declaration
func multicast<S>(_ createSubject: @escaping () -> S) -> Publishers.Multicast<Publishers.Concatenate<Prefix, Suffix>, S> where S : Subject, Self.Failure == S.Failure, Self.Output == S.Output
Parameters
createSubjectA closure to create a new
Subjecteach time a subscriber attaches to the multicast publisher.
Discussion
Use a multicast publisher when you have multiple downstream subscribers, but you want upstream publishers to only process one receive(_:) call per event.
In contrast with multicast(subject:), this method produces a publisher that creates a separate Subject for each subscriber.