How to hide TabView navigating from tabItem in childview in SwiftUI? - swiftui

I am using TabView in swiftui. I want navigate child view from tabview tabItem. When I navigate from taview to childview, it shows tabview in bottom. Here is the image.. that click login goes to Myview page. But in Myview, Tabview is not hiding
Here is my code..
Tabview
struct WelcomeView: View {
var body: some View {
TabView {
HomeView()
.tabItem {
Image("home_icon")
Text("Home")
}
.tag(0)
NotificationView()
.tabItem {
Image("notification_icon")
Text("Notification")
}.tag(1)
AccountView()
.tabItem {
Image("account_icon")
Text("Account")
}.tag(2)
SettingView()
.tabItem {
Image("settings_icon")
Text("Setting")
}.tag(3)
}
}
}
In SettingView tabItem:
struct SettingView: View {
#State private var isActive = false
var body: some View {
NavigationView {
VStack(alignment: .leading) {
VStack {
Button(action: {
isActive = true
}) {
Text("Login")
}
NavigationLink("", destination: MyView(), isActive: $isActive)
}
}
}
}
}
MyView:
struct MyView: View {
var body: some View {
ZStack{
Text("Hello My View")
}.navigationBarHidden(true)
.navigationBarTitleDisplayMode(.inline)
}
}
When I click login Button in SettingView tabItem, It goes to MyView page. But in MyView page tabview is not hide.
How to hide tabview from MyView page?

To hide the tab we can add a Bool that will take care of showing the view or not. Then by using #Binding we can pass it to the other child views, whatever changes you make down the chain will affect all the views.
struct WelcomeView: View {
#State var isTabViewShown = true
var body: some View {
TabView {
if isTabViewShown {
HomeView()
.tabItem {
Image(systemName: "house.fill")
Text("Home")
}
.tag(0)
NotificationView()
.tabItem {
Image(systemName: "envelope.open.fill")
Text("Notification")
}.tag(1)
AccountView()
.tabItem {
Image(systemName: "person.crop.circle")
Text("Account")
}.tag(2)
SettingView(isTabViewShown: $isTabViewShown)
.tabItem {
Image(systemName: "gearshape")
Text("Setting")
}.tag(3)
}
}
}
}
struct MyView: View {
#Binding var isTabViewShown: Bool
var body: some View {
ZStack{
Text("Hello My View")
}
.navigationBarHidden(false)
.navigationBarTitleDisplayMode(.inline)
.onAppear {
isTabViewShown = false
}
}
}
struct SettingView: View {
#State private var isActive = false
#Binding var isTabViewShown: Bool
var body: some View {
NavigationView {
VStack(alignment: .leading) {
VStack {
Button(action: {
isActive = true
}) {
Text("Login")
}
NavigationLink("", destination: MyView(isTabViewShown: $isTabViewShown), isActive: $isActive)
//Here is a button if you want to show it again
Button(action: {
isTabViewShown.toggle()
//You can also use this is you don't want to use a toggle
// isTabViewShown = true
}) {
Text("Show again")
}
}
}
}
}
}
struct HomeView: View {
var body: some View {
Text("Home View")
}
}
struct NotificationView: View {
var body: some View {
Text("Notification View")
}
}
struct AccountView: View {
var body: some View {
Text("Account View")
}
}

Related

Broken NavigationView Layout SwiftUI on TabView and TabViewStyle set to .page

I have the following code
enum Tab {
case accounts, lootbox
}
struct ContentView: View {
#State private var currentTab:Tab = .lootbox
var body: some View {
TabView(selection: $currentTab){
AccountView()
.tabItem {
Label("Accounts", systemImage: "person.crop.circle")
}
.tag(Tab.accounts)
Lootbox()
.tabItem {
Label("Lootbox", systemImage: "shippingbox")
}
.tag(Tab.lootbox)
}
.tabViewStyle(.page)
}
}
struct AccountView: View {
var body: some View {
NavigationView{
VStack{
Text("AccountView")
Spacer()
.navigationTitle("Lootbox")
}
}
.navigationViewStyle(.stack)
}
}
struct Lootbox: View {
var body: some View {
NavigationView{
VStack{
Text("Lootbox")
Spacer()
}
.navigationTitle("Lootbox")
}
.navigationViewStyle(.stack)
}
}
The VStackhides behind the navigation view title. After swiping right and left, it is as expected. Why is that? Or is this a bug of SwiftUI?
Before swipe left and right:
After (how it should be):

SwiftUI problem with not reloading Tab Item when using NavigationLink

I'm using Navigation View inside TabView and the problem is that if I an on Tab A and with NavigationView I open other Views, when changing from tab A to B and after a while I came back to tab A I dosen't reload tab A from beginning but it show the last View open with NavitagionLink. The problem is that in each View I'm getting data from a DB and because of that if shows an empty view.
My ContentView looks like this:
struct ContentView: View {
#ObservedObject var appState = AppState()
#State var currentTab : Tab
var body: some View {
TabView(selection: $appState.currentTab) {
NavigationView {
HomeView(appState: appState)
}
.tabItem {
if appState.currentTab == .home {
Image(systemName: "house.fill")
} else {
Image(systemName: "house")
}
Text(LocalizedStringKey("HomeTabMenu"))
}.tag(Tab.home)
NavigationView {
SearchView()
}
.tabItem {
if appState.currentTab == .search {
Image(systemName: "magnifyingglass.circle.fill")
} else {
Image(systemName: "magnifyingglass")
}
Text(LocalizedStringKey("SearchTabMenu"))
}.tag(Tab.search)
NavigationView {
AddItemView(appState: appState)
}
.tabItem {
if appState.currentTab == .add {
Image(systemName: "plus.circle.fill")
} else {
Image(systemName: "plus.circle")
}
Text(LocalizedStringKey("SellTabMenu"))
}.tag(Tab.add)
NavigationView {
ShoppingCartFavoritesView()
}
.tabItem {
if appState.currentTab == .favorites {
Image(systemName: "cart.fill")
} else {
Image(systemName: "cart")
}
Text(LocalizedStringKey("CartTabMenu"))
}.tag(Tab.favorites)
NavigationView {
ProfileView(appState: appState)
}
.tabItem {
if appState.currentTab == .profile {
Image(systemName: "person.fill")
} else {
Image(systemName: "person")
}
Text(LocalizedStringKey("ProfileTabMenu"))
}.tag(Tab.profile)
}//End TabView
.accentColor(Color("ColorMainDark"))
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView(currentTab: Tab.home)
}
}
class AppState: ObservableObject {
#Published var currentTab : Tab = .home
}
enum Tab {
case home, search, add, favorites, profile
}
And if I open SearchView()
struct SearchView: View {
var body: some View {
NavigationLink(destination: View_2(id: "ABC")){
Text("ABC")
}
}
}
struct View_2: View {
#ObservedObject var performSearchProducts = PerformSearchInProducts()
var id : String
var body: some View {
ScollView {
ForEach(performSearchProducts.products) { product in
Text(product.name)
}
}.onAppear(perform: {
self.performSearchProducts.searchSubCategory(id: id)
})
}
}
If in SearchView I'm on View_2() and the I open another Tab, when I come back to tab SearchView it doesn't show the SearchView(), but it remains on View_2() with the back button in navigation bar.
How can I make to show SearchView() and not keep the state of NavigationLink?
It's the default behavior. Attach id to TabView.
}//End TabView
.accentColor(Color("ColorMainDark"))
.id(appState.currentTab) //<--Here

SwiftUI, setting title to child views of TabView inside of NavigationView does not work

Why I am putting TabView into a NavigationView is because I need to hide the bottom tab bar when user goes into 2nd level 'detail' views which have their own bottom action bar.
But doing this leads to another issue: all the 1st level 'list' views hosted by TabView no longer display their titles. Below is a sample code:
import SwiftUI
enum Gender: String {
case female, male
}
let members: [Gender: [String]] = [
Gender.female: ["Emma", "Olivia", "Ava"], Gender.male: ["Liam", "Noah", "William"]
]
struct TabItem: View {
let image: String
let label: String
var body: some View {
VStack {
Image(systemName: image).imageScale(.large)
Text(label)
}
}
}
struct ContentView: View {
var body: some View {
NavigationView {
TabView {
ListView(gender: .female).tag(0).tabItem {
TabItem(image: "person.crop.circle", label: Gender.female.rawValue)
}
ListView(gender: .male).tag(1).tabItem {
TabItem(image: "person.crop.circle.fill", label: Gender.male.rawValue)
}
}
}
}
}
struct ListView: View {
let gender: Gender
var body: some View {
let names = members[gender]!
return List {
ForEach(0..<names.count, id: \.self) { index in
NavigationLink(destination: DetailView(name: names[index])) {
Text(names[index])
}
}
}.navigationBarTitle(Text(gender.rawValue), displayMode: .inline)
}
}
struct DetailView: View {
let name: String
var body: some View {
ZStack {
VStack {
Text("profile views")
}
VStack {
Spacer()
HStack {
Spacer()
TabItem(image: "pencil.circle", label: "Edit")
Spacer()
TabItem(image: "minus.circle", label: "Delete")
Spacer()
}
}
}
.navigationBarTitle(Text(name), displayMode: .inline)
}
}
What I could do is to have a #State var title in the root view and pass the binding to all the list views, then have those list views to set their title back to root view on appear. But I just don't feel so right about it, is there any better way of doing this? Thanks for any help.
The idea is to join TabView selection with NavigationView content dynamically.
Demo:
Here is simplified code depicting approach (with using your views). The NavigationView and TabView just position independently in ZStack, but content of NavigationView depends on the selection of TabView (which content is just stub), thus they don't bother each other. Also in such case it becomes possible to hide/unhide TabView depending on some condition - in this case, for simplicity, presence of root list view.
struct TestTabsOverNavigation: View {
#State private var tabVisible = true
#State private var selectedTab: Int = 0
var body: some View {
ZStack(alignment: .bottom) {
contentView
tabBar
}
}
var contentView: some View {
NavigationView {
ListView(gender: selectedTab == 0 ? .female : .male)
.onAppear {
withAnimation {
self.tabVisible = true
}
}
.onDisappear {
withAnimation {
self.tabVisible = false
}
}
}
}
var tabBar: some View {
TabView(selection: $selectedTab) {
Rectangle().fill(Color.clear).tag(0).tabItem {
TabItem(image: "person.crop.circle", label: Gender.female.rawValue)
}
Rectangle().fill(Color.clear).tag(1).tabItem {
TabItem(image: "person.crop.circle.fill", label: Gender.male.rawValue)
}
}
.frame(height: 50) // << !! might be platform dependent
.opacity(tabVisible ? 1.0 : 0.0)
}
}
This maybe a late answer, but the TabView items need to be assigned tag number else binding selection parameter won't happen. Here is how I do the same thing on my project:
#State private var selectedTab:Int = 0
private var pageTitles = ["Home", "Customers","Sales", "More"]
var body: some View {
NavigationView{
TabView(selection: $selectedTab, content:{
HomeView()
.tabItem {
Image(systemName: "house.fill")
Text(pageTitles[0])
}.tag(0)
CustomerListView()
.tabItem {
Image(systemName: "rectangle.stack.person.crop.fill")
Text(pageTitles[1])
}.tag(1)
SaleView()
.tabItem {
Image(systemName: "tag.fill")
Text(pageTitles[2])
}.tag(2)
MoreView()
.tabItem {
Image(systemName: "ellipsis.circle.fill")
Text(pageTitles[3])
}.tag(3)
})
.navigationBarTitle(Text(pageTitles[selectedTab]),displayMode:.inline)
.font(.headline)
}
}

How to perform a modal transition like the center button in the Instagram app with SwiftUI TabView?

import SwiftUI
struct ContentView: View {
#State var showModal = false
var body: some View {
TabView {
Text("Home View")
.tabItem {
VStack {
Image(systemName: "house")
Text("Home")
}
}
Text("Dummy View")
.onAppear {
self.showModal = true
}
.sheet(isPresented: self.$showModal) {
Text("Camera View")
}
.tabItem {
VStack {
Image(systemName: "camera")
Text("Camera")
}
}
Text("Setting View")
.tabItem {
VStack {
Image(systemName: "person")
Text("Setting")
}
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
When I tap the center camera button with above code,
"Dummy View" has been shown.
onAppear is called and self.showModal is set to true.
But, modal transition is not performed, and can not show the "Camera View".
How to perform a modal transition when tapped tab button with SwiftUI TabView?
Thank you krjw!
Finally, I have solved the problem with the following code:
import SwiftUI
struct ContentView: View {
#State var showModal = false
var body: some View {
TabView {
Text("Home View")
.tabItem {
VStack {
Image(systemName: "house")
Text("Home")
}
}
Text("Dummy View")
.onAppear {
DispatchQueue.main.async {
self.showModal = true
}
}
.sheet(isPresented: self.$showModal) {
Text("Camera View")
}
.tabItem {
VStack {
Image(systemName: "camera")
Text("Camera")
}
}
Text("Setting View")
.tabItem {
VStack {
Image(systemName: "person")
Text("Setting")
}
}
}
}
}
I had trouble with that and I am not sure why, but .sheet always worked best for me when I put it on the very top of my view hierarchy. Additionally I wrapped the call in .onAppear to run explicitly on the main queue (UI) which got it working:
struct ContentView: View {
#State var showModal = false
var body: some View {
TabView {
Text("Home View")
.tabItem {
VStack {
Image(systemName: "house")
Text("Home")
}
}
Text("Dummy View")
.onAppear {
print("Hallo")
DispatchQueue.main.async {
self.showModal = true
}
}
.tabItem {
VStack {
Image(systemName: "camera")
Text("Camera")
}
}
Text("Setting View")
.tabItem {
VStack {
Image(systemName: "person")
Text("Setting")
}
}
}
.sheet(isPresented: self.$showModal) {
Text("Camera View")
}
}
}
I hope this helps!

SwiftUI ContextMenu navigation to another view

I am trying to get a context menu to navigate to another view using the following code
var body: some View
{
VStack
{
Text(self.event.name).font(.body)
...
Spacer()
NavigationLink(destination: EditView(event: self.event))
{
Image(systemName: "pencil")
}
}
.navigationBarTitle(Text(appName))
.contextMenu
{
NavigationLink(destination: EditView(event: self.event))
{
Image(systemName: "pencil")
}
}
}
The NavigationLink within the VStack works as expected and navigates to the edit view but I want to use a contextMenu. Although the context menu displays the image, when I tap on it it doesn't navigate to the edit view, instead it just cancels the context menu.
I am doing this within a watch app but don't think that should make a difference, is there anything special I have to do with context menu navigation?
I would use the isActive variant of NavigationLink that you can trigger by setting a state variable. Apple documents this here
This variant of NavigationLink is well fit for dynamic/programatic navigation.
Your .contextMenu sets the state variable to true and that activates the NavigationLink. Because you don't want the link to be visible, set the label view to EmptyView
Here's an example, not identical to your post but hopefully makes it clear.
struct ContentView: View {
#State private var showEditView = false
var body: some View {
NavigationView {
VStack {
Text("Long Press Me")
.contextMenu {
Button(action: {
self.showEditView = true
}, label: {
HStack {
Text("Edit")
Image(systemName: "pencil")
}
})
}
NavigationLink(destination: Text("Edit Mode View Here"), isActive: $showEditView) {
EmptyView()
}
}
.navigationBarTitle("Context Menu")
}
}
}
In Xcode 11.4 it's now possible to do this with sensible NavigationLink buttons. Yay! 🎉
.contextMenu {
NavigationLink(destination: VisitEditView(visit: visit)) {
Text("Edit visit")
Image(systemName: "square.and.pencil")
}
NavigationLink(destination: SegmentsEditView(timelineItem: visit)) {
Text("Edit individual segments")
Image(systemName: "ellipsis")
}
}
This works on Xcode 11.6
struct ContentView: View {
#State var isActiveFromContextMenu = false
var body: some View {
NavigationView{
VStack{
NavigationLink(destination : detailTwo(), isActive: $isActiveFromContextMenu ){
EmptyView()
}
List{
NavigationLink(destination: detail() ){
row(isActiveFromContextMenu: $isActiveFromContextMenu)
}
NavigationLink(destination: detail() ){
row(isActiveFromContextMenu: $isActiveFromContextMenu)
}
NavigationLink(destination: detail() ){
row(isActiveFromContextMenu: $isActiveFromContextMenu)
}
}
}
}
}
}
struct detail: View {
var body: some View{
Text("Detail view")
}
}
struct detailTwo: View {
var body: some View{
Text("DetailTwo view")
}
}
struct row: View {
#Binding var isActiveFromContextMenu : Bool
var body: some View {
HStack{
Text("item")
}.contextMenu{
Button(action: {
self.isActiveFromContextMenu = true
})
{
Text("navigate to")
}
}
}
}
I found success in masking the NavigationLink in the background and switching the context with a Button as the shortest yet simplest alternative.
struct ContentView: View {
#State private var isShowing = false
var body: some View {
NavigationView {
Text("Hello")
.background(NavigationLink("", destination: Text("World!"), isActive: $isShowing))
.contextMenu {
Button {
isShowing = true
} label: {
Label("Switch to New View", systemImage: "chevron.forward")
}
}
}
}
}