如何在SwiftUI的收藏列表中添加内容？

import SwiftUI

struct ContentView: View {
    @State private var favorites = [
        Favorite(title: "Apple", description: "An American multinational technology company"),
        Favorite(title: "Google", description: "A multinational technology company specializing in Internet-related services"),
    ]
    
    var body: some View {
        NavigationView {
            List {
                ForEach(favorites) { favorite in
                    Text(favorite.title)
                }
            }
            .navigationTitle("Favorites")
            .navigationBarItems(trailing: addButton)
        }
    }
    
    private var addButton: some View {
        Button(action: {
            // Show a dialog or navigate to another view to add new favorite
            let newFavorite = Favorite(title: "New Favorite", description: "A newly added favorite")
            favorites.append(newFavorite)
        }) {
            Image(systemName: "plus")
        }
    }
}

struct Favorite: Identifiable {
    let id = UUID()
    let title: String
    let description: String
}

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