How can I implement asynchronous code in iOS?

How can I implement asynchronous code in iOS?

You can use Grand Central Dispatch (GCD) or async/await in Swift to handle asynchronous tasks.

Can you give me an example using async/await?

Sure! Here's a simple example:

func fetchData() async throws -> Data {
    let url = URL(string: "https://api.example.com/data")!
    let (data, _) = try await URLSession.shared.data(from: url)
    return data
}

What about error handling in asynchronous code?

You can use do-catch blocks to handle errors in async functions. For example:

do {
    let data = try await fetchData()
} catch {
    print("Error fetching data: \(error)")
}

Are there any performance considerations I should be aware of?

Yes, avoid blocking the main thread and be mindful of the number of concurrent tasks to prevent resource exhaustion.