navigationLink to tag in another view - swift

Question

Here's an edited version of the question. I'm working in Swiftui and I have two views. The first has two NavigationLinks. The second link is where I get stuck. I would like that link to go to 'tabTwo' on PageTwo. Getting to PageTwo isn't an issue... it's getting to tabTwo as a view on that page.
Here's an edited down contentView file:
import SwiftUI
struct ContentView: View {
#State var isNavigationBarHidden: Bool = true
#State private var selectedTab = ""
var body: some View {
NavigationView {
ZStack {
VStack(spacing: 0) {
VStack(spacing: 0) {
NavigationLink("Link One", destination: PageTwo()).padding(10)
.foregroundColor(Color.gray)
.background(Color.white)
Divider().frame(width: 300,height: 1).background(Color.black)
}
VStack(spacing: 0) {
NavigationLink("Link Two", destination: PageTwo())
.padding(10)
.foregroundColor(Color.gray)
.background(Color.white)
}
// If you remove the below VStack everything works.
VStack(spacing: 0) {
NavigationLink("Page Two tabTwo", destination: PageTwo(), tag: "tabTwo", selection: $selectedTab?)
.padding(10)
.foregroundColor(Color.gray)
.background(Color.white)
}
}
}
}
.navigationBarTitle("Hidden Title")
.navigationBarHidden(self.isNavigationBarHidden)
.onAppear {self.isNavigationBarHidden = true}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
and here's an edited down PageTwo:
import SwiftUI
struct PageTwo: View {
#Environment(\.presentationMode) var mode: Binding<PresentationMode>
#State var isNavigationBarHidden: Bool = true
#State private var selectedTab = ""
var body: some View {
ZStack() {
TabView(selection: $selectedTab) {
//---> Tab One
VStack(spacing: 0) {
VStack{
Text("PAGE ONE")
.padding(.bottom, 20)
}
Button(action: {
self.mode.wrappedValue.dismiss()})
{ Text("BACK") }
.font(Font.system(size:14, weight: .bold, design: .default))
}
.navigationBarTitle("Hidden Title")
.navigationBarHidden(self.isNavigationBarHidden)
.onAppear {self.isNavigationBarHidden = true}
.tabItem {Label("ONE", systemImage: "circle.fill")}
.tag("tabOne")
//---> Tab Two
VStack(spacing: 0) {
VStack{
Text("PAGE TWO")
.padding(.bottom, 20)
}
Button(action: {
self.mode.wrappedValue.dismiss()})
{ Text("BACK") }
.font(Font.system(size:14, weight: .bold, design: .default))
}
.navigationBarTitle("Hidden Title")
.navigationBarHidden(self.isNavigationBarHidden)
.onAppear {self.isNavigationBarHidden = true}
.tabItem {Label("TWO", systemImage: "circle.fill")}
.tag("tabTwo")
}
.tabViewStyle(PageTabViewStyle())
.indexViewStyle(.page(backgroundDisplayMode: .never))
.onAppear {self.isNavigationBarHidden = true}
}
.navigationBarTitle("Hidden Title")
.navigationBarHidden(self.isNavigationBarHidden)
.onAppear {self.isNavigationBarHidden = true}
.background(Color.gray)
.opacity(0.75)
.indexViewStyle(.page(backgroundDisplayMode: .never))
}
}
struct PageTwo_Previews: PreviewProvider {
static var previews: some View {
PageTwo()
}
}
This throws an error at the 'some view' level of:
Failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project
I've submitted the report, but can't figure out how to do what I'd like. Any help is much appreciated.