【Swift6 Concurrency】 新しい @observable クラスの書き方を知らないやつwww 👉 https://android.benigumo.com/20240706/swift6-observable/

TestObservable.swift

import SwiftUI

struct TestObservable: View {
  private var requester =  Requester()

  var body: some View {
    VStack {
      Text("\(requester.responseCode)")
      Text("\(requester.responseBody)")
    }
    .task {
      await requester.request()
    }
  }
}

@Observable
class Requester {
  var responseCode = -1
  var responseBody = "-"

  private let url = URL(string: "https://wttr.in/?format=3")!

  func request() async {
    do {
      let (data, response) = try await URLSession.shared.data(from: url)
      responseCode = (response as! HTTPURLResponse).statusCode
      responseBody = String(data: data, encoding: .utf8)!
    } catch {
      print(error)
    }
  }
}


#Preview {
  TestObservable()
    .padding()
    .frame(width: 300, height: 200)
}