JSONを使用してHTTP通信

import SwiftUI

struct ContentView: View {
    @State private var jsonData: [String: Any] = [:]

    var body: some View {
        VStack {
            Text("JSON Response:")
                .font(.headline)
                .padding()

            Text("\(jsonData)")
                .padding()

            Button("Fetch JSON") {
                fetchDataFromAPI()
            }
            .padding()
        }
    }

    func fetchDataFromAPI() {
        guard let url = URL(string: "https://example.com/api/data") else {
            return
        }

        URLSession.shared.dataTask(with: url) { (data, response, error) in
            if let error = error {
                print("Error: \(error)")
                return
            }

            guard let data = data else {
                print("No data received")
                return
            }

            do {
                let json = try JSONSerialization.jsonObject(with: data, options: [])
                if let jsonDictionary = json as? [String: Any] {
                    DispatchQueue.main.async {
                        self.jsonData = jsonDictionary
                    }
                }
            } catch {
                print("JSON parsing error: \(error)")
            }
        }.resume()
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}