NavigationLink example (Twitch Live Coding "arconsis")

NavigationLinkExample

//
//  ContentView.swift
//  iOS16
//
//  Created by arconsis on 22.07.22.
//

import SwiftUI

enum Route {
    case first, second, third
}

class Router: ObservableObject {
    @Published var navPath = NavigationPath()
    
    func popToRoot() {
        navPath = NavigationPath()
    }
    
    func goBack() {
        navPath.removeLast()
    }
    
    func go(to route: Route) {
        navPath.append(route)
    }
}

struct ContentView: View {
    
    @StateObject private var router: Router = Router()
    
    
    var body: some View {
        NavigationStack(path: $router.navPath) {
            Button(action: {
                router.go(to: .first)
            }, label: {
                Text("Go to First View")
            })
            .navigationDestination(for: Route.self, destination: view(for:))
        }
    }
    
    @ViewBuilder
    func view(for route: Route) -> some View {
        switch route {
        case .first:
            FirstView()
        case .second:
            SecondView()
        case .third:
            ThirdView()
                .environmentObject(router)
        }
    }
}

struct FirstView: View {
    var body: some View {
        ZStack {
            Color.red
                .ignoresSafeArea()
            
            NavigationLink(value: Route.second) {
                Text("Go to Second View")
            }
            
        }
        .navigationTitle(Text("First View"))
    }
}

struct SecondView: View {
    var body: some View {
        ZStack {
            Color.orange
                .ignoresSafeArea()
            .navigationTitle(Text("Second View"))
            
            NavigationLink(value: Route.third) {
                Text("Go to Third View")
            }
        }
    }
}

struct ThirdView: View {
    @EnvironmentObject private var router: Router
    
    var body: some View {
        ZStack {
            Color.yellow
                .ignoresSafeArea()
            .navigationTitle(Text("Third View"))
            
            VStack {
                Button {
                    router.goBack()
                } label: {
                    Text("Go back")
                }
                
                Button {
                    router.popToRoot()
                } label: {
                    Text("Pop to root")
                }
            }

        }
    }
}


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