subject# RxCombine
RxCombine provides bi-directional type bridging between RxSwift and Apple's Combine framework.
Note: This is highly experimental, and basically just a quickly-put-together PoC. I gladly accept PRs, ideas, opinions, or improvements. Thank you ! :)
Basic Examples
Check out the Example App in the ExampleApp folder. Run pod install
before opening the project.
Installation
CocoaPods
Add the following line to your Podfile:
pod 'RxCombine'
Swift Package Manager
Add the following dependency to your Package.swift file:
.package(url: "https://github.com/CombineCommunity/RxCombine.git", from: "1.6.0")
Carthage
Carthage support is offered as a prebuilt binary.
Add the following to your Cartfile:
github "CombineCommunity/RxCombine"
I want to ...
Use RxSwift in my Combine code
RxCombine provides several helpers and conversions to help you bridge your existing RxSwift types to Combine.
Note: If you want to learn more about the parallel operators in Combine from RxSwift, check out my RxSwift to Combine Cheat Sheet (or on GitHub).
Observable
(and otherObservableConvertibleType
s) have apublisher
property which returns aAnyPublisher<Element, Swift.Error>
mirroring the underlyingObservable
.
let observable = Observable.just("Hello, Combine!")
observable
.publisher // AnyPublisher<String, Swift.Error>
.sink(receiveValue: { value in ... })
Relays
andSubjects
can be converted to their Combine-counterparts using thetoCombine()
method, so you can use them as if they are regular Combine Subjects, and have them connected to your existing subjects.
let relay = BehaviorRelay<Int>(value: 0)
// Use `sink` on RxSwift relay
let combineSubject = relay.toCombine()
combineSubject.sink(receiveValue: { value in ... })
// Use `send(value:)` on RxSwift relay
combineSubject.send(1)
combineSubject.send(2)
combineSubject.send(3)
Use Combine in my RxSwift code
RxCombine provides several helpers and conversions to help you bridge Combine code and types into your existing RxSwift codebase.
Publisher
s have aasObservable()
method, providing anObservable<Output>
mirroring the underlyingPublisher
.
// A publisher publishing numbers from 0 to 100.
let publisher = AnyPublisher<Int, Swift.Error> { subscriber in
(0...100).forEach { _ = subscriber.receive($0) }
subscriber.receive(completion: .finished)
}
publisher
.asObservable() // Observable<Int>
.subscribe(onNext: { num in ... })
PassthroughSubject
andCurrentValueSubject
both have aasAnyObserver()
method which returns aAnyObserver<Output>
. Binding to it from your RxSwift code pushes the events to the underlying Combine Subject.
// Combine Subject
let subject = PassthroughSubject<Int, Swift.Error>()
// A publisher publishing numbers from 0 to 100.
let publisher = AnyPublisher<Int, Swift.Error> { subscriber in
(0...100).forEach { _ = subscriber.receive($0) }
subscriber.receive(completion: .finished)
}
// Convert a Publisher to an Observable and bind it
// back to a Combine Subject 🤯🤯🤯
publisher.asObservable()
.bind(to: subject)
Observable.of(10, 5, 7, 4, 1, 6)
.subscribe(subject.asAnyObserver())
Future ideas
Add CI / TestsCarthage Support- Bridge SwiftUI with RxCocoa/RxSwift
Partial Backpressure support, perhaps?- ... your ideas? :)
License
MIT, of course ;-) See the LICENSE file.
The Apple logo and the Combine framework are property of Apple Inc.