import SwiftUI

class UserData: ObservableObject {
    @Published var name: String = "John Doe"
}

struct UserView: View {
    @ObservedObject var userData: UserData
    
    var body: some View {
        VStack {
            Text("Hello, \(userData.name)")
            TextField("Enter your name", text: $userData.name)
        }
    }
}

struct ContentView: View {
    var body: some View {
        UserView(userData: UserData())
    }
}