NavigationSplitView not working as shown in "What's new with SwiftUI" session

Of course right after I asked the question I notice this in the release notes 🤦‍♂️

Conditional views in columns of NavigationSplitView fail to update on some state changes. (91311311) Workaround: Wrap the contents of the column in a ZStack.

Thank you! I got exactly the same. I was building a simple list-detail interface with NavigationSplitView and wondering why it was not updating the detail contents. Wrapping the column content in ZStack helped.

Just in case others hit it, here’s my code.

struct Thing: Identifiable, Hashable {
    let id: UUID
    let name: String
}

struct ContentView: View {
    let things: [Thing]
    @State private var selectedThing: Thing?
    var body: some View {
        NavigationSplitView {
            List(things, selection: $selectedThing) { thing in
                NavigationLink(value: thing) {
                        Text("navlink: \(thing.name)")
                }
            }
        } detail: {
          // This is the ZStack wrapper, hopefully won’t be needed when 91311311 is fixed.
          ZStack {
            if let selectedThing {
              Text("There is a thing: \(selectedThing.name)")
            } else {
              Text("There is no thing.")
            }
          }
        }
    }
}

Not solving it for me, the view's constructor is getting called but neither the onAppear() nor task() is getting called

I found that appending an .id modifier to the detail column resolved the problem for me:

         } detail: {

            if let selectedCocktail {

               CocktailDetailView(pCocktail: selectedCocktail)

                  .navigationTitle("(selectedCocktail.favorite ? "(profile.userData.favoriteCocktailsIcon.rawValue)" : "") (selectedCocktail.cocktailName ?? "")")

                  .id(selectedCocktail.id) //workaround }

Hi Andrew, thank you very much for your workaround - finally I can get my Detail view to refresh correctly. ".onAppear" finally fires.

I've tried all the other suggestions above without success.

I'm a beginner in iOS App development and I've struggled with this problem for 3 days. I don't understand yet as to why it works, but that's for another day

Cheers