Collapse a doubleColumn NavigationView detail in SwiftUI like with collapsed on UISplitViewController?

Question

So when I make a list in SwiftUI, I get the master-detail split view for \"free\".

So for instance with this:

import SwiftUI

struct ContentView : Vi         


        

Answer 1

import SwiftUI

var hostingController: UIViewController?

func showList() {
    let split = hostingController?.children[0] as? UISplitViewController
    UIView.animate(withDuration: 0.3, animations: {
        split?.preferredDisplayMode = .primaryOverlay
    }) { _ in
        split?.preferredDisplayMode = .automatic
    }
}

func hideList() {
    let split = hostingController?.children[0] as? UISplitViewController
    split?.preferredDisplayMode = .primaryHidden
}

// =====

struct Dest: View {
    var person: String

    var body: some View {
        VStack {
            Text("Hello! \(person)")
            Button(action: showList) {
                Image(systemName: "sidebar.left")
            }
        }
        .onAppear(perform: hideList)
    }
}

struct ContentView : View {
    var people = ["Angela", "Juan", "Yeji"]

    var body: some View {
        NavigationView {
            List {
                ForEach(people, id: \.self) { person in
                    NavigationLink(destination: Dest(person: person)) {
                        Text(person)
                    }
                }
            }
            VStack {
                Text("