Here is an example of a SwiftUI app that demonstrates navigation between multiple views using NavigationView and NavigationLink. This example will help you understand how to structure navigation hierarchies in SwiftUI:

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: DetailView()) {
                    Text("Go to Detail View")
                        .padding()
                        .background(Color.blue)
                        .foregroundColor(.white)
                        .cornerRadius(8)
                }
                
                NavigationLink(destination: SettingsView()) {
                    Text("Go to Settings View")
                        .padding()
                        .background(Color.green)
                        .foregroundColor(.white)
                        .cornerRadius(8)
                }
            }
            .navigationBarTitle("Home")
        }
    }
}

struct DetailView: View {
    var body: some View {
        VStack {
            Text("This is the Detail View")
                .font(.largeTitle)
                .padding()
            
            NavigationLink(destination: MoreDetailView()) {
                Text("Go to More Detail View")
                    .padding()
                    .background(Color.orange)
                    .foregroundColor(.white)
                    .cornerRadius(8)
            }
        }
        .navigationBarTitle("Detail")
    }
}

struct MoreDetailView: View {
    var body: some View {
        Text("This is the More Detail View")
            .font(.largeTitle)
            .padding()
            .navigationBarTitle("More Detail")
    }
}

struct SettingsView: View {
    var body: some View {
        Text("This is the Settings View")
            .font(.largeTitle)
            .padding()
            .navigationBarTitle("Settings")
    }
}

@main
struct MultiViewApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

Explanation:

1. ContentView Struct:
   • Wrapped in a NavigationView to provide a navigation context.
   • Contains NavigationLink views to navigate to DetailView and SettingsView.
   • Each NavigationLink has a destination and a label.
2. DetailView Struct:
   • A simple view with text and a NavigationLink to MoreDetailView.
   • The navigation bar title is set to “Detail”.
3. MoreDetailView Struct:
   • A view with text and a navigation bar title “More Detail”.
4. SettingsView Struct:
   • A view with text and a navigation bar title “Settings”.
5. MultiViewApp Struct:
   • Sets up the main window of the app with ContentView as its root view.

How to Use:

• Copy the code into a new SwiftUI project in Xcode.
• Run the project on a simulator or device to see the navigation in action.
• Tap the buttons to navigate between the different views.

This example demonstrates how to create a navigation hierarchy in SwiftUI using NavigationView and NavigationLink, enabling you to build apps with multiple views and seamless navigation.