All methods and mutable properties inside an actor are isolated to that actor by default, which means they cannot be accessed directly from code that’s external to the actor. Acce...

Swift’s tasks use cooperative cancellation, which means that although we can tell a task to stop work, the task itself is free to completely ignore that instruction and carry...

Async/await Sequences and streams Tasks and task groups Actors Testing Solutions

One common confusion with actors comes in deciding exactly where code runs, because just adding @MainActor and hoping for the best is rarely good enough.与 Actor 的一个常...

You can only call async functions from other async functions, because they might need to suspend themselves and everything that is waiting for them. This leads to a bit of a chicke...

Swift's actors run on their own executor most of the time, so they manage how and where their work is done. However, during the actor's initialization its executor isn't ready to t...

Swift Testing's parameterized tests allow us to send multiple values into a single test, and they'll be run in parallel for maximum performance. If you don't want this – if you wa...

Older Swift code uses completion handlers for notifying us when some work has completed, and sooner or later you’re going to have to use it from an async function –&nbs...

Just like their synchronous counterparts, Swift’s async functions can be throwing or non-throwing depending on how you want them to behave. However, there is a twist: although we ...

Swift’s actors are conceptually like classes that are safe to use in concurrent environments. This safety is made possible because Swift automatically ensures no two pieces of cod...