SwiftUI: NavigationView inside TabView height not occupying the fullscreen

Question

I seeing an unexpected UI issue in my SwiftUI project when I add a NavigationView inside a TabView.

Here's my code,

struct MainView: View {
    @State private var selectedTab: Int = 0

    var body: some View {
        TabView(selection: $selectedTab) {
            NavigationView {
                ScrollView {
                    VStack {
                        ForEach(0..<30) { i in
                            Text("Hello World")
                                .padding()
                                .frame(minWidth: .zero, maxWidth: .infinity)
                        }
                    }
                }.background(Color.red)
                .navigationTitle("Home View")
            }.background(Color.green)
            .navigationViewStyle(StackNavigationViewStyle())
            .tabItem {
                TabItem(title: "Explore", systemImage: selectedTab == 0 ? "house.fill" : "house")
            }.tag(1)
            
            ExploreView()
                .background(Color.red)
                .tabItem {
                    TabItem(title: "Explore", systemImage: selectedTab == 1 ? "safari.fill" : "safari")
                }.tag(1)
        }
    }
}

Here's my scene delegate code,

struct RootView: View {
    var body: some View {
        MainView()
    }
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {
    var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo _: UISceneSession, options _: UIScene.ConnectionOptions) {
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            self.window = window
        }

        let host = UIHostingController(rootView: RootView())
        window?.rootViewController = host
        window?.makeKeyAndVisible()
    }
}

The height of the ScrollView(which resides inside the NavigationView) is not occupying the full screen. I tried all the tricks(padding, frame, GeometryReader, ...), but no luck. I couldn't figure out what am I doing wrong here, any help would be really appreciated.

Answer 1

Thanks for the answers and for offering to help me.

I accidentally comment UITabBar's appearance logic, which fixed that problem. I'm not sure if this is a bug in SwiftUI or I'm missing something. Anyhow, commenting this following appearance fixed the issue,

// UITabBar.appearance().isTranslucent = false   <<-- Remove this

Answer 2

It is inside safe area, you need to ignore it

}.background(Color.red)
.navigationTitle("Home View")
.ignoresSafeArea()             // << here !!