URLSession.shared.data(from: url) fails in Swift Playgrounds for Mac

adding … needsIndefiniteExecution = true … fixes this in the playground.

That’s pretty standard practice. Which you created your playground, what template did you start from?

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—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

I started from: https://www.hackingwithswift.com/forums/swiftui/urlsession-shared-data-from-url-fails-in-swift-playgrounds-for-mac/14987

in the playground, it is clear to me where needsIndefiniteExecution = true

goes, simply at the top of the script. In the app I am making, I don’t know where it goes. When I put it at the top of the file, it complains about not being able to run in a global scope. Is there a difference between the playground and the app (made in Swift playgrounds)?

In the app I am making

So this is the key point. If you’re creating a playground, you need to set needsIndefiniteExecution and it makes sense to do that at the top of your playground. OTOH, if you’re creating an app, that’s not necessary because apps run indefinitely already.

So, that’s the reason for early my question. When you starting writing code, did you choose File > New App? Or File > New Blank Playground?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

I misread your previous post. Here is a reproducible example, start with File > New App and then a simple app using a network call:

import SwiftUI

struct Response: Codable {
  var results: [Result]
}

struct Result: Codable {
  var trackId: Int
  var trackName: String
  var collectionName: String
}

struct ContentView: View {
  @State private var results = [Result]()
   
  var body: some View {
    List(results, id: \.trackId) { item in
      VStack(alignment: .leading) {
        Text(item.trackName)
          .font(.headline)
        Text(item.collectionName)
      }
    }
    .task {
      results = await loadData()
    }
  }
}

func loadData() async -> [Result]{
  var results = [Result(trackId: -1, trackName: "No Tracks Available", collectionName: "No Collection Available")]
   
  let url = URL(string: "https://itunes.apple.com/search?term=taylor+swift&entity=song")
   
  do {
    let (data, _) = try await URLSession.shared.data(from: url!)
     
    if let decodedResponse = try? JSONDecoder().decode(Response.self, from: data) {
      results = decodedResponse.results
    }
  } catch {
    print("Invalid data")
  }
  return results
}

For which I saw: Seems like I might have a wrong setting or something? I have tried this on two separate macbooks with no success on either.

Nudging the thread… is this a bug or am I missing something?