如何在Swiftui Ios模拟器屏幕中显示Post方法请求数据？

import SwiftUI

struct ContentView: View {
    @State private var responseData: String = ""
    @State private var isLoading = false
    
    var body: some View {
        VStack {
            if isLoading {
                ProgressView("Loading...")
            } else {
                Text(responseData)
                    .padding()
            }
            
            Button(action: fetchData) {
                Text("Fetch Data")
            }
            .padding()
        }
    }
    
    func fetchData() {
        isLoading = true
        
        let url = URL(string: "https://your-api-endpoint.com/data")!
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        
        let body: [String: AnyHashable] = ["key": "value"]
        request.httpBody = try? JSONSerialization.data(withJSONObject: body, options: [])
        
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            DispatchQueue.main.async {
                self.isLoading = false
                if let error = error {
                    self.responseData = "Error: \(error.localizedDescription)"
                    return
                }
                
                if let data = data {
                    do {
                        let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
                        self.responseData = "Response: \(json ?? [:])"
                    } catch {
                        self.responseData = "Error parsing JSON: \(error.localizedDescription)"
                    }
                }
            }
        }
        
        task.resume()
    }
}

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