Hello fellow SwiftUI'ers! 🤓

In my project I have the root view which conditionally displays either full-screen logo image (loading mode), or main view of the app, based on whether required data was loaded.

When root view appears, it initiates data loading via onReceive and updates local @State property with received data. That triggers root view update and the main view displayed instead.

I can't make main view to appear with slide transition (or any other transition, that is) - no matter how I do it. I have added .transition(.slide) to both of my views and enclosed @State property update in withAnimation, but still the main view always appears immediately. 😕

I have tried moving .transition modifier around, using DispatchQueue.main.async to update @State property, enclosing my views in different type of container - absolutely nothing does any difference. I bet I'm missing something fundamental here and would be very grateful of any kind of help! 🙏

Thanks a lot!

Here is greatly simplified version of my root view.

struct RootView: View {
    @State private var data: [String]

    var body: some View {
        return Group {
            Group {
                if !data.isEmpty {
                    NavigationView {
                        MainView(with: data)
                    }.transition(.slide)
                } else {
                    ZStack {
                        Color.clear
                        Image(uiImage: Images.oxygenLogo.image)
                    }.transition(.slide)
                }
            }

        }.onReceive(service.loadData().receive(on: DispatchQueue.main)) { data in
            withAnimation {
                self.data = data
            }
        }
    }
}

After trial-and-error session I finally found what was causing transitions to not work. It's root Group... Changing it to ZStack immediatelly resolved the issue. I was able to make transition work by altering other views, but the animation duration parameter was always ignored nevertheless. With the ZStack as root view both transitions and animation duration works as expected. Hope that will help someone 🤓