Make NavigationStack case study available on Mac

Author: ole

ViewLifecycle/App.swift

@@ -6,5 +6,15 @@ struct ViewLifecycleApp: App {
         WindowGroup {
             RootView()
         }
+        #if os(macOS)
+            Window("NavigationStack", id: "navigation-stack") {
+                CaseStudyNavigationStack()
+                    .toolbar {
+                        ToolbarItem {
+                            Color.clear
+                        }
+                    }
+            }
+        #endif
     }
 }

ViewLifecycle/CaseStudyNavigationStack.swift

@@ -1,5 +1,22 @@
 import SwiftUI
 
+#if os(macOS)
+struct CaseStudyNavigationStackMac: View {
+    @Environment(\.openWindow) private var openWindow: OpenWindowAction
+
+    var body: some View {
+        VStack {
+            Text("This example opens in a separate window because SwiftUI on macOS 13.1 can’t seem to handle a NavigationStack nested in a NavigationSplitView (or I’m holding it wrong; I’m running into an infinite loop with this setup).")
+            Button("Open NavigationStack window") {
+                openWindow(id: "navigation-stack")
+            }
+        }
+        .padding()
+        .navigationTitle("NavigationStack")
+    }
+}
+#endif
+
 struct CaseStudyNavigationStack: View {
     @State private var navigationPath: [Int] = []
 

ViewLifecycle/RootView.swift

@@ -75,7 +75,7 @@ struct MainContent: View {
             CaseStudyLazyVGrid()
         case .navigationStack:
             #if os(macOS)
-                Text("SwiftUI on macOS 13.0 can’t seem to handle a NavigationStack nested in a NavigationSplitView. Please test this one on iOS.")
+                CaseStudyNavigationStackMac()
             #else
                 CaseStudyNavigationStack()
             #endif