It seems the page will be recreated when switch between tabs each time.

[Horse888]

struct ContentView: View {
    
    private enum Item: Int, Tabbable {
        case first = 0
        case second
        case third
        
        var icon: String {
            switch self {
                case .first: return "house"
                case .second: return "magnifyingglass"
                case .third: return "person"
            }
        }
        
        var title: String {
            switch self {
                case .first: return "First"
                case .second: return "Second"
                case .third: return "Third"
            }
        }
    }
    
    @State private var selection: Item = .first
    @State private var visibility: TabBarVisibility = .visible
    
    var body: some View {
        TabBar(selection: $selection, visibility: $visibility) {
            Button {
                withAnimation {
                    visibility.toggle()
                }
            } label: {
                Text("Hide/Show TabBar")
            }
            .tabItem(for: Item.first)
            
			Second()
                .tabItem(for: Item.second)
            
            Text("Third")
                .tabItem(for: Item.third)
        }
        .tabBar(style: CustomTabBarStyle())
        .tabItem(style: CustomTabItemStyle())
    }
}

struct ContentSystemTabView: View {
	var body: some View {
		TabView {
			Text("First")
				.tabItem {
					Text("first")
				}

			Second()
				.tabItem {
					Text("second")
				}
		}
	}
}

struct Second: View {
	init() {
		print("init...")
	}
	var body: some View {
		Text("Second")
	}
}

You will find the difference between TabView.

[onl1ner]

Hello, @Horse888!

Yeah, I know about this issue and unfortunately have no idea how to fix that currently. Apple's TabView most-likely a wrapper around UITabBar, so it has this feature that saves the state of the child views, but as this library purely written in SwiftUI it has this downside.

I've added to this issue help wanted Extra attention is needed tag and if you have any idea how to fix that feel free to share it with me or open PR. Thanks!

[davoxdavo]

What if you will create lazy instances of each TabView than just. reuse them

[onl1ner]

Hello, @davoxdavo!

Sorry for late response, could you please clarify your idea, because I think I do not understand your suggestion well

[nashschultz]

I've seen it done by changing the opacity to 1.0 or 0 based on the selected view rather than reloading it. I'm not sure how that affects performance

[jcbriones]

Opacity won't work unless you want to do a fade in fade out effect. Basically hiding it with hidden modifier, disable the view, and disabling accessibility to the view that way it user cannot interact with while its hidden.

[Jinya]

I think this approach UIKitTabView would be what you guys are looking for.

[winddpan]

I did some tests and it seems to be fine

#24