Combine is a reactive programming framework introduced by Apple in iOS 13, macOS 10.15, and other platforms. By leveraging a declarative approach, Combine helps handle event streams and data updates efficiently. One of the fundamental components in Combine are the Publishers. This article dives into what a Publisher is, how it works, and practical examples of its usage.
What is a Publisher?
A Publisher is a type that can transmit a sequence of values over time. This allows to "listen" for changes that could have been done by an unknown element.
We can convert any type to a Publisher type using the @Published keyword, adding the possibility of subscribing to any new change.
Let's see an example where we have a ViewModel that subscribe to a Service property changes:
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