Introduction to AsyncStream in Swift: A Practical Example with a Timer
async await
AsyncStream is a powerful way in swift to handle sequences of asynchronous values.
In this article I’ll run through AsyncStream and how it works, with a simple timer example helping us dive into the code and how to test AsyncStream.
What is AsyncStream?
AsyncStream allows the production of a sequence of values over time. Values are emitted as they become ready, making it ideal for handling:
- Network responses
- User events
- Timers
As well as providing tools so we can manage cancellation and asynchronous flows gracefully.
Key Concepts
When we use AsyncStream the producer yields values to the stream, and the consumer iterates over them asynchronously.
There are built-in mechanisms for handling task cancellation.
A Timer Using AsyncStream
I’ve already indicated that timers are good use cases for AsyncStream, so what better example for this article?
Essentially the timer will produce asynchronous sequences using AsyncStream.
