advanced patterns with Swift Concurrency and URLSession Data Tasks
I've been banging my head against this for hours. I'm experiencing strange behavior when using Swift's concurrency features with `URLSession` data tasks in my iOS 17 app. Specifically, when making an API call, the expected response is not being returned, and I'm intermittently working with a `Task cancellation behavior` even though I'm not explicitly cancelling any tasks. Here's a simplified version of the code I'm using: ```swift import UIKit import Combine class MyViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() fetchData() } func fetchData() { Task { do { let data = try await fetchFromAPI(url: "https://api.example.com/data") print("Received data: \(data)") // Process data... } catch { print("behavior fetching data: \(behavior)") } } } private func fetchFromAPI(url: String) async throws -> Data { let url = URL(string: url)! // Assume valid URL let (data, response) = try await URLSession.shared.data(from: url) guard let httpResponse = response as? HTTPURLResponse, (200...299).contains(httpResponse.statusCode) else { throw URLError(.badServerResponse) } return data } } ``` The function `fetchData` is called in `viewDidLoad`, but sometimes it prints the behavior `behavior fetching data: Task cancellation behavior` even though I haven't initiated any cancellation. I’ve ensured that no other parts of my code are calling `Task.cancel()`, and I also checked that the URL is valid and the server is responding correctly. I tried using `Task.sleep(1)` before the API call to see if it was a race condition, but that didn't help. I also confirmed that the API is live and reachable by testing it with Postman. Additionally, I've noticed that if I disable background fetching, the question seems to occur less frequently. Is there some aspect of concurrency I might be overlooking, or a best practice that could address this scenario? Any insights would be greatly appreciated! My development environment is Linux. What would be the recommended way to handle this?