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SOLVED: How to hide a custom tabbar on a detail view?

Forums > SwiftUI
@FlorianM  

I created the custom tabbar like below and I need to hide it only on the DetailView which is below the MyLibraryView in hierarchy.

What would be the best way to achieve that? I tried to come up with several approaches but they all seemed overly complicated and couldn't make them work well in the end.

This is the MainView: 

import SwiftUI

struct MainView: View {

    //        @State var selectedTab: Tabs = .home

    @State var selectedIndex = 0

    var body: some View {

        ZStack {
            if selectedIndex == 0 {
                HomeView()
            } else if selectedIndex == 1 {
                MyLibraryView()
            } else if selectedIndex == 2 {
                BrowseView()
            } else if selectedIndex == 3 {
                ProfileView()
            } 

            VStack {
                Spacer()
                    CustomTabBarView(selectedIndex: $selectedIndex)
            }

        }
    }
}

And this is the CustomTabView:


import SwiftUI

struct CustomTabBarView: View {

    @Binding var selectedIndex : Int

    let tabBarImageNames = ["house", "rectangle.stack", "square.grid.2x2","person.fill" ]
    let tabBarNames = ["Home", "My library", "Browse", "Profile"]

    var body: some View {

        VStack {
            HStack (){
                Spacer()
                Spacer()
                ForEach(0..<4) { num in
                    Button(action: {
                        selectedIndex = num
                    }, label: {
                        Spacer()
                        VStack  {
                            Image(systemName: tabBarImageNames[num])
                                .font(.system(size: 20))
                                .frame(width: 20,height: 20)
                                .foregroundColor(selectedIndex == num ? Color(.black) : .init(white: 0.6))
                                .scaledToFit()
                            Text (tabBarNames[num])
                                .padding(.top,2)
                                .font(.system(size: 12))
                                .foregroundColor(selectedIndex == num ? Color(.black) : .init(white: 0.6))
                        }

                        Spacer()
                    })
                }
            }

            .ignoresSafeArea()
            .frame(height: 70)
            .background(.white.opacity(0.85))
        }
        .background(.ultraThinMaterial)
        .cornerRadius(30)
        .padding(.horizontal,20)
        .if(!hasNotch()) { view in
            view.padding(.bottom,10)
        }
        .shadow(color: Color.black.opacity(0.05), radius: 10)
    }
}

2      

@NigelGee  HWS+

Here a couple of solutions

IF BLOCK

Wrap the CustomTabBarView in a if block

struct ContentView: View {
    @State var selectedIndex = 0

    var body: some View {

        ZStack {
            if selectedIndex == 0 {
                HomeView()
            } else if selectedIndex == 1 {
                MyLibraryView(selectedIndex: $selectedIndex)
            } else if selectedIndex == 2 {
                BrowseView()
            } else if selectedIndex == 3 {
                ProfileView()
            }

            if selectedIndex != 1 {
                VStack {
                    Spacer()
                    CustomTabBarView(selectedIndex: $selectedIndex)
                }
            }
        }
    }
}

PS you have to have a Button in the MyLibraryView to return.

struct MyLibraryView: View {
    @Binding var selectedIndex : Int

    var body: some View {
        VStack {
            Text("My Library View")
              .padding()

            Button("Home") {
                selectedIndex = 0
            }
        }
    }
}

SHEET VIEW

Use a fullScreenCover to overlay the MyLibraryView need to amend the CustomTabBarView

struct CustomTabBarView: View {
    @Binding var selectedIndex : Int
    @Binding var showMyLibraryView: Bool //<- add this

    let tabBarImageNames = ["house", "rectangle.stack", "square.grid.2x2","person.fill" ]
    let tabBarNames = ["Home", "My library", "Browse", "Profile"]

    var body: some View {

        VStack {
            HStack (){
                Spacer()
                Spacer()
                ForEach(0..<4) { num in
                    Button(action: { // <- Change the action
                        if num == 1 {
                            showMyLibraryView = true
                        } else {
                            selectedIndex = num
                        }
                    }, label: {
                        Spacer()
                        VStack  {
                            Image(systemName: tabBarImageNames[num])
                                .font(.system(size: 20))
                                .frame(width: 20,height: 20)
                                .foregroundColor(selectedIndex == num ? Color(.black) : .init(white: 0.6))
                                .scaledToFit()
                            Text (tabBarNames[num])
                                .padding(.top,2)
                                .font(.system(size: 12))
                                .foregroundColor(selectedIndex == num ? Color(.black) : .init(white: 0.6))
                        }

                        Spacer()
                    })
                }
            }

            .ignoresSafeArea()
            .frame(height: 70)
            .background(.white.opacity(0.85))
        }
        .background(.ultraThinMaterial)
        .cornerRadius(30)
        .padding(.horizontal,20)
//        .if(!hasNotch()) { view in
//            view.padding(.bottom,10)
//        }
        .shadow(color: Color.black.opacity(0.05), radius: 10)
    }
}

Then you can change the main view to

struct ContentView: View {
    @State var selectedIndex = 0
    @State private var showMyLibraryView = false

    var body: some View {

        ZStack {
            if selectedIndex == 0 {
                HomeView()
            } else if selectedIndex == 2 {
                BrowseView()
            } else if selectedIndex == 3 {
                ProfileView()
            }

            VStack {
                Spacer()
                CustomTabBarView(selectedIndex: $selectedIndex, showMyLibraryView: $showMyLibraryView)
            }
        }
        .fullScreenCover(isPresented: $showMyLibraryView) {
            MyLibraryView()
        }
    }
}

PS you need to change the MyLibraryView to dismiss the sheet

struct MyLibraryView: View {
    @Environment(\.dismiss) var dismiss

    var body: some View {
        VStack {
            Text("My Library View")
              .padding()

            Button("Dismiss") {
               dismiss()
            }
        }
    }
}

2      

@FlorianM  

Hi @NigelGee, Thank you for your suggestions, but I think they don't accomplish what I need (maybe I needed to be a little more clear). I do need the tabbar in the MyLibraryView. But inside the MyLibraryView there is a list and if you tap an item you get into the Detailview. And the DetailView is where I don't need the tab bar. So this DetailView is like a separate page and that's the only place where I don't need the tab bar.

2      

@NigelGee  HWS+

It would help if you give the correct information. I have done this but it only guessing what you want but this keep the tab bar in view until the detail view is shown

struct ContentView: View {
    @State var selectedIndex = 0
    @State private var showTabBar = true // <- Controls if TabBar is visable

    var body: some View {

        ZStack {
            if selectedIndex == 0 {
                HomeView()
            } else if selectedIndex == 1 {
                MyLibraryView(showTabBar: $showTabBar) // <- pass in control to the view
            } else if selectedIndex == 2 {
                BrowseView()
            } else if selectedIndex == 3 {
                ProfileView()
            }

            if showTabBar {
                VStack {
                    Spacer()
                    CustomTabBarView(selectedIndex: $selectedIndex)
                }
            }
        }
    }
}
struct MyLibraryView: View {
    let data = ["One", "Two", "Three", "Four", "Five", "Six"] // <- list of made up data for list

    @Binding var showTabBar: Bool // <- pass though Binding

    var body: some View {
        NavigationView {
            List {
                ForEach(data, id: \.self) { input in
                    NavigationLink(destination: DetailView(input: input, showTabBar: $showTabBar)) {
                        Text(input)
                    }
                }
            }
            .navigationTitle("My Library")
        }
    }
}
struct DetailView: View {
    var input: String
    @Binding var showTabBar: Bool

    var body: some View {
        Text(input)
            .onAppear { // <- when view appears TabBar is not visable
                showTabBar = false
            }
            .onDisappear {
                showTabBar = true // <- when view is dismissed then TabBar is visable
            }
    }
}

3      

@FlorianM  

Thank you so much @NigelGee that works perfectly!

I did mention it, but I could have been more clear and will be in the future.

2      

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