json 已获取的数据未显示在IOS应用程序中

我正在构建一个ios应用程序，前端使用SwiftUI，API使用ts。
我试过使用List(results) { result in ...然后使用Text(result.current_button.title)打印获取的数据，而不是显示数据，我在那里有一个白色。
现在我尝试使用ForEach(list.datas){解决这个问题，但它现在也显示出来了。

如何在应用程序屏幕上打印提取的数据？

import SwiftUI
class MainScreenVM: ObservableObject {
    @Published var datas = [MainScreenStruct]()
    init() {
        loadData()
    }
    func loadData() {
        print("Fetching started")
        guard let url = URL(string: "http://localhost:3000/getMainScreen")
        else {
            print("Invalid URL")
            return
        }
        let json: [String: Any] = ["grade": "12R",
                                   "group": ["matemaatika": "G1",
                                             "eesti keel": "G2"]]
        let jsonData = try? JSONSerialization.data(withJSONObject: json)
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.httpBody = jsonData
        URLSession.shared.dataTask(with: request) { data, response, error in
            if let data = data {
                if let response = try? JSONDecoder().decode([MainScreenStruct].self, from: data) {
                    DispatchQueue.main.async {
                    //DispatchQueue.global().async {
                        self.datas = response
                    }
                    return
                }
            }
        }.resume()
    }
}

struct MainScreen: View{
    @StateObject var list = MainScreenVM()
    var body: some View {
        ZStack{
            LinearGradient(colors: [.pink, .orange], //if all lessons are finished or a weekend than fun color
                           startPoint: .topLeading, endPoint: .bottomTrailing)
            .edgesIgnoringSafeArea(.all)
            
            VStack {
                VStack {
                    ProgressView(value: 2, total: 5) //value and total depends on the amount of lessons and lessons done
                        .padding()
                    HStack {
                        VStack(alignment: .leading) {
                            Text("Lessons done")
                                .font(.system(size: 20))
                            Label("3", systemImage: "house.fill") //instead of actual amount "300"
                        }
                        .padding()
                        Spacer()
                        VStack(alignment: .trailing) {
                            Text("Lessons left")
                                .font(.system(size: 20))
                            Label("2", systemImage: "flag.checkered.2.crossed")
                        }
                        .padding()
                    }
                    Spacer()
                    
                    HStack {
                        VStack(alignment: .center) {
                            Button(action: {
                                print("VENE SUUR SÖÖGISAAL")
                            }) {
                                ForEach(list.datas) { item in
                                    HStack{
                                        Image(systemName: "brain.head.profile")
                                            .font(.largeTitle)
                                        Text(item.current_button.title)
                                    }
                                    .frame(minWidth: 0, maxWidth: .infinity)
                                    .padding()
                                    .foregroundColor(.white)
                                    .background(LinearGradient(colors: [.indigo, .accentColor],
                                                               startPoint: .bottomTrailing, endPoint: .leading))
                                    .cornerRadius(10)
                                    .shadow(color: .gray, radius: 5.0)
                                    .padding()
                                }
                            }
                            VStack() {
                                Text("Ends in {0} hours {20} minutes {4} seconds")
                                
                                
                            }
                        }
                    }
                    HStack {
                        VStack(alignment: .center) {
                            Button(action: {
                                print("VENE SUUR SÖÖGISAAL")
                            }) {
                                HStack{
                                    Image(systemName: "books.vertical.fill")
                                        .font(.largeTitle)
                                    Text("Next lesson is {English}")
                                        .font(.subheadline  )
                                }
                                .frame(minWidth: 0, maxWidth: .infinity)
                                .padding()
                                .foregroundColor(.white)
                                .background(LinearGradient(colors: [.indigo, .accentColor],
                                                           startPoint: .bottomTrailing, endPoint: .leading))
                                .cornerRadius(10)
                                .shadow(color: .gray, radius: 5.0)
                                .padding()
                            }
                            Text("The lesson starts at {14:50}")
                        }
                    }
                    HStack {
                        VStack(alignment: .center) {
                            Button(action: {
                                print("VENE SUUR SÖÖGISAAL")
                            }) {
                                HStack{
                                    Image(systemName: "fork.knife.circle.fill")
                                        .font(.largeTitle)
                                    Text("Lunch is in 1 hour 15 minutes 30 seconds")
                                        .font(.subheadline  )
                                }
                                .frame(minWidth: 0, maxWidth: .infinity)
                                .padding()
                                .foregroundColor(.white)
                                .background(LinearGradient(colors: [.indigo, .accentColor],
                                                           startPoint: .bottomTrailing, endPoint: .leading))
                                .cornerRadius(10)
                                .shadow(color: .gray, radius: 5.0)
                                .padding()
                            }
                        }
                    }
                    Spacer()
                    
                }
            }
        }
    }
}

struct TimeLeft_Previews: PreviewProvider {
    static var previews: some View {
        MainScreen()
    }
}

class VM: ObservableObject {
    @Published var posts: [Post] = []
    @Published var errorString:Bool = false
    
    init() {
        getDataFromAPI()
    }
    
    func getDataFromAPI() {
        // Make a request to your localhost to retrieve the list of users
        guard let url = URL(string: "http://localhost:3000/posts") else {
            print("Invalid URL")
            return
        }
        URLSession.shared.dataTask(with: url) { (data, response, error) in
            if let error = error {
                print("Error fetching users: \(error.localizedDescription)")
                DispatchQueue.main.async {
                    self.errorString = true
                }
                return
            }
            guard let data = data else { return }
            do {
                // Parse the JSON data and create an array of User objects
                let jsonDecoder = JSONDecoder()
                let posts = try jsonDecoder.decode([Post].self, from: data)
                DispatchQueue.main.async {
                    self.posts = posts
                }
            } catch {
                print("Error parsing JSON: \(error.localizedDescription)")
            }
        }.resume()
    }
}

这是我的视图模型和获取函数。你可以根据需要修改代码。

json 已获取的数据未显示在IOS应用程序中

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