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...

Swift’s async let syntax provides short, helpful syntax for running lots of work concurrently, allowing us to wait for them all later on. However, it only works as ...

Swift lets us perform async operations using both await and async let, but although they both run some async code they don’t quite run the same: await wai...

Swift tries to ensure access to shared data is done safely, partly through types such as actors, and partly through a concept of sendability implemented through the ...

Sometimes you want to run several async operations at the same time then wait for their results to come back, and the easiest way to do that is with async let. This lets you start...

Just as Swift’s functions can be asynchronous, computed properties can also be asynchronous: attempting to access them must also use await or similar, and may also need&...

Whenever we use await to call an async function, we mark a potential suspension point in our code – we’re acknowledging that it’s entirely possible our function w...

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...

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 ...

Using async functions in Swift is done in two steps: declaring the function itself as being async, then calling that function using await.在 Swift 中使用异步函数分两步完...