I ran into this too, but managed to find a solution.
The updateNSView method. was getting called very frequently and so reloading the table which lost the section.
I made this function check if its data had changed before reloading and that worked.
I had passed the data to the Coordinator for use in the data source & delegate, so this code worked for me:
func updateNSView(_ nsView: NSTableView, context: Context) {
if tableData != context.coordinator.tableData {
context.coordinator.tableData = tableData
nsView.reloadData()
}
}
The elements in my data array were already Equatable, so this works fine.
SarahR
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Thank you. The tip to create a scheme with "Debug executable" turned off in the Run settings is working for me.
No ideal but at least I can run my apps now.
I found that I could open the project in Xcode 12.0.1, add the package dependency and then go back to 12.2.
Seems to work fine but hopefully 12.2 will be fixed soon.
I have the same on an Intel MacBook so it isn't just a DTK issue.
Big Sur beta 8, Xcode 12.2
Filing a feedback.
Solved this. In the primary navigationView, you have to include a placeholder view for the detail view. See below for an example. Without the Text("Select a link...") view, the problem occurs.
struct ContentView: View {
		var body: some View {
				NavigationView {
						List {
								ForEach(1 ... 10, id: \.self) { index in
										NavigationLink(destination:
																		Text("\(index)")
																		 .frame(maxWidth: .infinity, maxHeight: .infinity)
										) {
												Text("Link \(index)")
										}
								}
						}
						.listStyle(SidebarListStyle())
						Text("Select a link...")
								.frame(maxWidth: .infinity, maxHeight: .infinity)
				}
				.frame(maxWidth: .infinity, maxHeight: .infinity)
		}
}