And additionally, in the case without selPriv, I end up getting this warning on device when the selection doesn't work: 2023-09-14 10:44:45.305377-0700 NavSplitView[20843:16029318] [Assert] Collection view focus state got out of sync. Expected <SwiftUI.ListCollectionViewCell: 0x13d050a00; baseClass = UICollectionViewListCell; frame = (116 44; 288 44); layer = <CALayer: 0x600002305540>> to be the current managed subview but found <SwiftUI.ListCollectionViewCell: 0x14d01a000; baseClass = UICollectionViewListCell; frame = (116 44; 288 44); alpha = 0; layer = <CALayer: 0x6000023fa520>>. It doesn't happen when I use the private selection case (but the selection still doesn't highlight).

As an experiment I tried a private state variable for the selection. Selections are highlighted (but the detail is broken), but as soon as I hook up the onChange, the detail works but the selections fail struct ContentStringX: View { let content = [StringItem(item: "Here"), StringItem(item: "There"), StringItem(item: "Everywhere") ] @Binding var selection : StringItem? @State private var selPriv : StringItem? var body: some View { List(content, selection: $selPriv) { c in NavigationLink(value: c) { Text(c.item) } } .onChange(of: selPriv) { new in selection = selPriv } } }

OK, so I have figured out what was going on in SampleTrip. It turns out that TripListItem includes a NavigationLink so copying that pattern var body: some View { NavigationSplitView { List(players, selection: $selectedPlayer) { player in NavigationLink(value: player) { Text(player.shortName ?? "") } } .navigationTitle("Players") } detail: { if let p = selectedPlayer { Text("detail \(p.shortName ?? "")") } else { Text("detail empty") } } Now works. So in this case, I don't need to pass in id. Any thoughts on whether using the NavigationLink here is the preferred approach? At least part of the mystery is resolved!

Switching over to another entity that doesn't have an explicit uuid : UUID attribute didn't make a difference. And from what I can tell, by default CoreData entries conform to Identifiable so that doesn't make sense to me.

The code: @FetchRequest(sortDescriptors: []) private var players: FetchedResults<PlayerEntity> @State private var selectedPlayer : PlayerEntity? var body: some View { NavigationSplitView { List(players, selection: $selectedPlayer) { player in Text(player.shortName ?? "") } .navigationTitle("Players") } detail: { if let player = selectedPlayer { Text("Do Something") } } } The list appears, but is not selectable, and the detail view doesn't get presented. I also tried using the same List/ForEach style of the sample code.

How is your post "asked 35 minutes ago" but there are already replies from 6 days ago?

FB9126666

I can confirm the same issue with a catalyst app (running on macOS). Xcode 12.4 macOS 11.1. Same code is working fine on the iOS simulator targets. I'm surprised because I thought I would have already tested this but at present the receipt is never delivered.