struct ContentView: View {

    @State var items = [Item]()

    var body: some View {
        //1. Embed your View into a Navigation View
        NavigationView {
            List(items) { item in
                Text(item.name)
            }
            //2. Add a Title for your Navigation Bar
            .navigationBarTitle(Text("To-Do"), displayMode: .inline)
            //.3 Add the Bar Items
            .navigationBarItems(trailing:
                HStack {
                    Button(action: {self.addTask()}) {
                        Image(systemName: "plus.circle")
                    }
                    Button(action: {self.addTask()}) {
                        Image(systemName: "minus.circle")
                    }
                })
        }
    }

    func addTask() {
        let item = Item(id: items.count+1, name: "Sample Task")
        items.append(item)
    }

    func removeTask() {
        items.removeLast()
    }
}

struct Item: Identifiable {
    var id: Int
    var name: String
}