Although Swift functions are synchronous by default, we can make them asynchronous by adding one keyword: async. Inside asynchronous functions, we can call other asy...

Many of Apple’s frameworks report back success or failure using multiple different delegate callback methods rather than completion handlers, which means a simple continuation won...

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 ...

By default, all Swift functions are synchronous, but what does that mean? A synchronous function is one that executes all its work in a simple, straight line on a single threa...

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...

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...

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...

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 provides withCheckedContinuation() and withUnsafeContinuation() to let us create continuations that can’t throw errors, but if the API you’re using ...

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...