如何删除SwiftUI NavigationView中的默认导航栏空间

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("Hello, World!")
                .navigationBarTitle("")
                .navigationBarHidden(true)
        }
        .navigationViewStyle(StackNavigationViewStyle())
    }
}

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("Hello, World!")
                .navigationBarTitle("Custom Title")
                .navigationBarItems(trailing: Button(action: {
                    // Handle button action
                }) {
                    Image(systemName: "plus")
                })
        }
    }
}

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            Text("Hello, World!")
                .navigationBarTitle("Custom Title")
                .background(NavigationConfigurator { nc in
                    nc.navigationBar.setBackgroundImage(UIImage(), for: .default)
                    nc.navigationBar.shadowImage = UIImage()
                })
        }
    }
}

struct NavigationConfigurator: UIViewControllerRepresentable {
    var configure: (UINavigationController) -> Void = { _ in }

    func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationConfigurator>) -> UIViewController {
        UIViewController()
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<NavigationConfigurator>) {
        if let nc = uiViewController.navigationController {
            self.configure(nc)
        }
    }
}