A-Usage.md

This is designed to look like sheet(item:content:):

func sheet<Item, Content>(item: Binding<Item?>, content: @escaping (Item) -> Content) -> some View

But for pushing views instead of presenting them as sheets.

To use it, create a @State variable for your selected item:

@State var selectedPerson: Person?

Then, chain at the end of your view:

    .pushView(item: $selectedPerson) { person in
        PersonDetail(person: person)
    }

If you need mutation, your Item type should probably be some kind of ID or index with which to fetch the item, otherwise you will end up with stale data.

BuildableNavigationLink.swift

extension View {
    func pushView<Item, Destination: View>(item: Binding<Item?>, content: @escaping (Item) -> Destination) -> some View {
        return self.overlay(
            BuildableNavigationLink(selectedItem: item, destinationBuilder: content)
        )
    }
}


struct BuildableNavigationLink<Model, Destination: View>: View {

    var selectedItem: Binding<Model?>

    let destinationBuilder: (Model) -> Destination

    @ViewBuilder
    var destination: some View {
        Group {
            if let model = selectedItem.wrappedValue {
                destinationBuilder(model)
            } else {
                EmptyView()
            }
        }
    }

    var body: some View {
        NavigationLink(
            destination: destination,
            isActive: Binding(get: { self.selectedItem.wrappedValue != nil}, set: { _ in self.selectedItem.wrappedValue = nil }),
            label: {
                EmptyView()
            }
        )
    }
}