I'm seeing fully reproducible issues with URLSession on iOS 18.4 RC Simulator running from Xcode 16.3 RC. URLSession seems to get into a broken state after a second app run. The following sample succeeds in fetching the JSON on first app run but when the app is closed and ran again it fails with one of these errors:
- Error: Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost."
- Error: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."
I'm wondering if this something related to my OS setup or is this due to internal URLSession changes in iOS 18.4. Already submitted as FB17006003.
Sample code attached below:
import SwiftUI
@main
struct NetworkIssue18_4App: App {
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
struct ContentView: View {
@State private var message: String = ""
var body: some View {
VStack {
Text(message)
Button("Try Again") {
Task {
await fetch()
}
}
}
.task {
await fetch()
}
}
private func fetch() async {
message = "Loading..."
let url = URL(string: "https://poetrydb.org/title/Ozymandias/lines.json")!
let session = URLSession.shared
do {
let response = try await session.data(from: url)
print("Response: \(response)")
message = "Success, data length: \(response.0.count)"
} catch {
print("Error: \(error)")
message = "Error: \(error.localizedDescription)"
}
}
}
