pointfree_swiftUI1_swift

// point free video 65 at the 14:50 point.
// https://www.pointfree.co/episodes/ep65-swiftui-and-state-management-part-1#t887
// 
// This code has an issue whereby a navigation link cannot be activated twice unless 
// the other navigation link is actived in between the two activations of a particular
// link.

import SwiftUI

struct ContentView: View {
    var body: some View {
        NavigationView {
            List {
                NavigationLink(destination: CounterView()) {
                    Text("Counter demo")
                }
                NavigationLink(destination: EmptyView()) {
                    Text("Favorite primes")
                }
            }
            .navigationBarTitle("State management")
        }
    }
}

struct CounterView: View {
    var body: some View {
        VStack {
            HStack {
                Button( action: {}) {
                    Text("-")
                }
                Text("0")
                Button( action: {}) {
                    Text("+")
                }
            }
            Button( action: {}) {
                Text("Is this prime?")
            }
            Button( action: {}) {
                Text("What is the 0th prime?")
            }
        }
        .font(.title)
        .navigationBarTitle("Counter demo")
    }
}

import PlaygroundSupport

PlaygroundPage.current.liveView = UIHostingController(
    // rootView: CounterView()
    rootView: ContentView()
)