Is there a problem with the way I'm structuring my SwiftUI project that causes .navigationTitle to not appear?

Question

My SwiftUI project refuses to display the navigation title after a certain point. I'm using a navigation structure that I haven't seen implemented on any example projects I've seen, but it makes sense to me and has been seeming to work thus far. My suspicion is that since I'm using a different navigation structure that it is part of the problem. The .navigationBar is there on every page, but the title doesn't display.

SettingsView.swift screen

I've tried many solutions on Stack Overflow and otherwise. I've tried every combination of .navigationBarHidden(false), .navigationBarTitle() and .navigationBarBackButtonHidden(true) on every page listed below, with no change. I've also tried every location I could think of to place these combinations of .navigationBar modifiers.

Recently, I discovered .toolbar, and this changes nothing either. My suspicion is that (as seen in the code snippets below) since the NavigationView is in the first view (WelcomeUI.swift), I can't place the .navigationBarTitle deeper in the code.

Below is my current navigation structure, and bits of code from each file:

WelcomeUI.swift

struct WelcomeUI: View { 
   var body: some View {
      NavigationView {
         VStack {
            //NavigationLink(destination: SignupUI(), label: {
               //Text("Sign Up")
            //}
            NavigationLink(destination: LoginUI(), label: {
               Text("Log In")
            }
         }
      }
   }
}

LoginUI.swift

struct LoginUI: View {
   var body: some View {
      VStack {
         
         NavigationLink(destination: MainUI(), label: { Text("Log In") })
         //Button(action: { ... }
      }
   .navigationBarHidden(false)
   }
}

Note: SignupUI.swift is essentially the same as LoginUI.swift

MainUI.swift

struct MainUI: View {
   var body: some View {
      TabView {
         //SpendingView()
            //.tabItem {
               //Image(...)
               //Text("Spending")
            //}
         //SavingView()
            //.tabItem {
               //Image(...)
               //Text("Saving")
            //}
         //AddView()
            //.tabItem {
               //Image(...)
               //Text("Add")
            //}
         //EditView()
            //.tabItem {
               //Image(...)
               //Text("Edit")
            //}
         SettingsView()
            .tabItem {
               //Image(...)
               Text("Settings")
            }
      }
      .navigationBarBackButtonHidden(true)
   }
}

Note: All views in MainUI.swift are structured the same.

SettingsView.swift

struct SettingsView: View {
   var body: some View {
      ZStack {
         Form {
            Section(header: Text("Section Header")) {
               NavigationLink(destination: WelcomeUI()) {
                  Text("Setting Option")
               }
            }
            Section {
               //Button("Log Out") {
                  //self.logout()
               //}
               Text("Log Out")
            }
         }
         .navigationBarTitle("Settings") // This has no effect on code no matter where it is place in SettingsView.swift
      }
   }
}

I should also note that only the pages after MainUI.swift is affected by this. WelcomeUI.swift and LoginUI.swift work as expected.

Answer 1

Look at the MainUI navigationTitle. I just put a title in every View to find what was going on.

import SwiftUI
struct SubSpendingView: View {
    var body: some View {
        ScrollView{
            Text("SubSpendingView")
            
        }.navigationBarTitle("SubSpending"
                             //, displayMode: .inline
        )
    }
}
struct SpendingView: View {
    var body: some View {
        ScrollView{
            Text("SpendingView")
            NavigationLink("subSpending", destination: SubSpendingView())
        }.padding()
    }
}
struct WelcomeUI: View {
    var body: some View {
        NavigationView {
            VStack {
                //NavigationLink(destination: SignupUI(), label: {
                //Text("Sign Up")
                //}
                NavigationLink(destination: LoginUI(), label: {
                    Text("Go to Log In")
                })
            }.navigationTitle(Text("WelcomeUI"))
        }
    }
}
struct SettingsView: View {
    var body: some View {
        VStack{
            ZStack {
                
                
                Form {
                    Section(header: Text("Section Header")) {
                        NavigationLink(destination: WelcomeUI()) {
                            Text("Setting Option")
                        }
                    }
                    Section {
                        //Button("Log Out") {
                        //self.logout()
                        //}
                        Text("Log Out")
                    }
                }
                Button("say-high", action: {print("Hi")})
                // This has no effect on code no matter where it is place in SettingsView.swift
            }
        }//.navigationBarTitle("Settings")
    }
}
struct LoginUI: View {
    var body: some View {
        VStack {
            
            NavigationLink(destination: MainUI(), label: { Text("Log In") })
            //Button(action: { ... }
        }.navigationTitle(Text("LoginUI"))
        .navigationBarHidden(false)
    }
}
struct MainUI: View {
    @State var selectedTab: Views = .adding
    var body: some View {
        
        TabView(selection: $selectedTab) {
            SpendingView()
                .tabItem {
                    Image(systemName: "bag.circle")
                    Text("Spending")
                }.tag(Views.spending)
            //SavingView()
            //.tabItem {
            //Image(...)
            //Text("Saving")
            //}
            Text("Adding View")
                .tabItem {
                    Image(systemName: "plus")
                    Text("Add")
                }.tag(Views.adding)
            Text("Edit View")
                .tabItem {
                    Image(systemName: "pencil")
                    Text("Edit")
                }.tag(Views.edit)
            SettingsView()
                .tabItem {
                    Image(systemName: "gear")
                    Text("Settings")
                }.tag(Views.settings)
        }
        //This overrides the navigationTitle in the tabs
        .navigationBarTitle(Text(selectedTab.rawValue)
                            //, displayMode: .inline
        )
        .navigationBarBackButtonHidden(true)
    }
}
enum Views: String{
    case settings = "Settings"
    case spending = "Spending"
    case adding = "Add"
    case edit = "Edit"
}
struct PaddyNav: View {
    var body: some View {
        WelcomeUI()
            //Wont work
            .navigationTitle(Text("PaddyNav"))
    }
}

struct PaddyNav_Previews: PreviewProvider {
    static var previews: some View {
        PaddyNav()
    }
}