An Example of NavigationStack Navigation

NavigationExample.swift

import SwiftUI

enum NavigationPath {
    case red
    case blue
    case green
}

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

struct ContentView: View {
    @State var path: [NavigationPath] = []
    
    var body: some View {
        NavigationStack { 
            RedView()
            .navigationDestination(for: NavigationPath.self) { value in
                switch value {
                case .red:
                    RedView()
                case .blue:
                    BlueView()
                case .green:
                    GreenView()
                }
            }
        }
    }
}

struct RedView: View {
    var body: some View {
        VStack {
            NavigationLink(value: NavigationPath.blue) { 
                Text("Blue")
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .navigationTitle(Text("Red View"))
        .background(Color.red)
        
    }
}

struct BlueView: View {
    var body: some View {
        VStack {
            NavigationLink(value: NavigationPath.green) { 
                Text("Green")
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .navigationTitle(Text("Blue View"))
        .background(Color.blue)
    }
}

struct GreenView: View {
    var body: some View {
        VStack {
            NavigationLink(value: NavigationPath.red) { 
                Text("Red")
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .navigationTitle(Text("Green View"))
        .background(Color.green)
    }
}