How would you manage async tasks in an iOS app?

Question

Anonymous · Accepted Answer

Async/await is a syntax in Swift (and many other programming languages) used for
writing asynchronous, non-blocking code in a more readable and linear manner.
 * Async: Marks a function as asynchronous, meaning it can suspend its execution
   and wait for a result without blocking the thread.
 * Await: Pauses the execution of the async function until the awaited
   asynchronous operation completes.

WHEN TO USE IT:

1. Network Calls: For handling API requests or database operations without
    freezing the UI.
 2. Concurrency: When you want to perform multiple tasks simultaneously but in a
    structured way.
 3. Simplified Code: To replace nested closures or completion handlers, making
    the code cleaner and easier to maintain.

Example in Swift:

swiftCopy codefunc fetchData() async throws -> Data {

let url = URL(string: "https://api.example.com/data")!

let (data, _) = try await URLSession.shared.data(from: url)

return data

}

This makes asynchronous code behave more like synchronous code while remaining
efficient and non-blocking.

Anonymous · Answer

Async/await is a syntax in Swift used to work with asynchronous code more
cleanly and readably.
 * Async marks a function that performs asynchronous work, allowing it to pause
   and resume.
 * Await pauses the execution of the current function until the asynchronous
   task completes, returning its result.

Use it when:
 * You need to perform operations like network requests, file I/O, or database
   queries without blocking the main thread.
 * You want to improve code readability and maintainability compared to
   completion handlers or delegate patterns.

How would you manage async tasks in an iOS app?

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