What is SwiftUI combine?

A subject is a publisher that you can use to ”inject” values into a stream , by calling its send(_:) method. This can be useful for adapting existing imperative code to the Combine model.

Combine was introduced as a new framework by Apple at WWDC 2019 . The framework provides a declarative Swift API for processing values over time and can be seen as a 1st party alternative to popular frameworks like RxSwift and ReactiveSwift.6 Nis 2021

Combine is not actually necessary for bindings to happen, but this doesn’t mean you can’t harness its power. You can use SwiftUI on its own to create bindings . But using Combine allows more power. As you’ll see throughout the tutorial, once you are on the ViewModel side, using Combine becomes the natural choice.

Open-source implementation of Apple’s Combine framework for processing values over time . The main goal of this project is to provide a compatible, reliable and efficient implementation which can be used on Apple’s operating systems before macOS 10.15 and iOS 13, as well as Linux, Windows and WebAssembly.

Publishers and Subscribers hold SwiftUI together , they provide the synchronization between the UI and the underlying model. Besides Publishers and Subscribers, Combine also contains a third feature called Operators. Operators operate on a Publisher, perform some computation, and return another Publisher.1 Oca 2021

Overview. The Combine framework provides a declarative Swift API for processing values over time . These values can represent many kinds of asynchronous events. Combine declares publishers to expose values that can change over time, and subscribers to receive those values from the publishers.