5/16/2023 0 Comments Publisher plus tutorial![]() ![]() These must match the Output and Failure of the publisher.Ī subscriber receives a stream of value, completion or failure events from a publisher. Like Publisher, it has two associated types: Input and Failure. ![]() Publishers and operators are pointless unless something is listening to the published events. Like a river, values come from the upstream publisher and flow to the downstream publisher. Think of values flowing from the original publisher, through a series of operators. You can chain multiple operators together to perform complex processing. An operator describes a behavior for changing values, adding values, removing values or many other operations. Operators are special methods that are called on publishers and return the same or a different publisher. Several Foundation types have been enhanced to expose their functionality through publishers, including Timer and URLSession, which you’ll use in this tutorial.
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