Consider this view:
import SwiftUI
struct ContentView: View {
		@State var selection: ListObject?
		var objects: [ListObject]
		var body: some View {
				NavigationView {
						List {
								ForEach(objects) { object in
										NavigationLink(
												destination:
														ListObjectView(object: object), tag: object, selection: $selection,
												label: {
														Text(object.text)
												})
								}
						}.listStyle(SidebarListStyle())
						.toolbar {
								ToolbarItem {
										Button("Push item") {
												selection = objects.first
										}
								}
						}
						Text("Empty view, pick something.").padding()
				}.onAppear {
						DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
								selection = objects.first
						}
				}
		}
}
This is a simple list, where I can programmatically control the selection, and push another view into the navigation stack. I demonstrate two ways of doing this here, both with a timer and then with a button. Everything works as expected.
Now, when I change the @State variable to @Binding, and pass it in from outside, this suddenly stops working. No matter what I do, I can no longer programmatically change the selection. What’s more, the list UI itself stops working: when I tap on a list item, nothing happens, and no detail view appears.
Why do @State and @Binding behave differently here? Why does navigation link selection work with one, but not the other?
