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):
Related
I have two views embedded in a TabView and a third view activated by a ToolbarItem in a navigationStack.
problem 1)
When I tap on plus button I navigate to my addView, but I still can see the tabs at the bottom.
problem 2)
after many test I found that if put the tabView code in MainView Inside a NavigationStack, I solve problem 1) but each time I dismiss from a detailView from a row in ContentView, the navigation Item disappears.
the main view for the tabview
struct MainView: View {
var body: some View {
TabView {
ContentView()
.tabItem {
Label("List", systemImage: "list.dash")
}
SettingsView()
.tabItem {
Label("Settings", systemImage: "gearshape.fill")
}
}
}
}
the ContentView (a list of lessons, navigationDestination goes to a detail view)
struct ContentView: View {
#Environment(\.managedObjectContext) var moc
#FetchRequest (sortDescriptors: [
SortDescriptor(\.lessonNuber, order: .reverse)
], predicate: nil) var lessons: FetchedResults<Lesson>
#State var showAddView = false
var body: some View {
NavigationStack {
VStack {
List {
ForEach(lessons, id: \.self) { lesson in
NavigationLink {
DetailView(lesson: lesson)
} label: {
HStack {
Text("\(lesson.lessonNuber)")
.font(.title)
Text( "\(lesson.un_notion)")
.font(.body)
}
}
}
}
// .background(
// NavigationLink(destination: AddView(), isActive: $showAddView) {
// AddView()
// }
// )
.navigationDestination(isPresented: $showAddView) {
AddView()
}
.toolbar {
ToolbarItem(placement: .navigationBarLeading) {
Button {
showAddView = true
} label: {
Label("Add Lesson", systemImage: "plus")
}
}
}
}
.padding()
}
}
}
With the below code I get a very weird scrolling behaviour in my TabViews, LoginView is called on app launch:
struct LoginView: View {
#State private var presentContent = false
var body: some View {
return NavigationView {
ZStack{
NavigationLink(
destination: ContentView(),
isActive: $presentContent,
label: {
EmptyView()
})
Button("TEst") {
self.presentContent.toggle()
}
}
}
}
}
struct ContentView: View {
var body: some View {
TabView{
Group{
List{
Text("Item 1")
Text("Item 2")
Text("Item 3")
}
}
.navigationTitle("Transactions")
.tabItem {
Image(systemName: "list.dash")
Text("Transactions")
}
Group{
List{
Text("Item 11")
Text("Item 12")
Text("Item 13")
}
}
.navigationTitle("Summary")
.tabItem {
Image(systemName: "list.dash")
Text("Summary")
}
}
}
}
Any ideas what that might cause?
Here the issue in verbatim: after tapping the button in the LoginView to jump over to the ContentView, I see the first tab. Now I scroll the list up and it goes beyond the screen border which is not correct.
UPDATE: Adding the app launch code below to emphasize the point "LoginView is called on app launch:":
struct TabTestApp: App {
var body: some Scene {
WindowGroup {
LoginView()
}
}
}
Use a NavigationView inside the TabView instead of Group. The login view you have isn't presented or even used. This will fix the scrolling issue.
Edit: Adding a login add additional elements which are unclear. You'd need a data model to handle the login details yourself, but a simple approach could be something like this.
class LoginModel: ObservableObject {
#Published var loggedin: Bool = false
}
struct Login: View {
#ObservedObject var model: LoginModel
#Environment(\.dismiss) var dismiss
var body: some View {
NavigationView {
List {
}
.toolbar {
ToolbarItem(placement: .navigationBarTrailing) {
Button(action: {
dismiss()
print("if successful login handle here and dismiss")
}, label: {
Label("Close", systemImage: "xmark")
.labelStyle(.iconOnly)
})
}
}
}
}
}
struct ContentView: View {
#StateObject var loginmodel = LoginModel()
#State var sheet: Bool = false
var body: some View {
TabView {
NavigationView {
VStack {
if !loginmodel.loggedin {
Button(action: {
sheet.toggle()
}, label: {
Label("Login", systemImage: "person.circle.fill")
})
} else {
List {
NavigationLink("Item 1", destination: Text("Item 1"))
NavigationLink("Item 2", destination: Text("Item 2"))
NavigationLink(destination: Text("Item 3")) {
Text("Item 3")
}
}
}
}
.navigationTitle("Transactions")
}
.sheet(isPresented: $sheet) {
Login(model: loginmodel)
}
.tabItem {
Label("Transactions", systemImage: "list.dash")
}
NavigationView {
List {
Text("Item 11")
Text("Item 12")
Text("Item 13")
}
.navigationTitle("Summary")
}
.tabItem {
Label("Summary", systemImage: "chart.line.uptrend.xyaxis")
}
}
}
}
struct ContentView: View {
var body: some View {
TabView {
NavigationView {
List {
// Either or navigation link if needed
NavigationLink("Item 1", destination: Text("Item 1"))
NavigationLink("Item 2", destination: Text("Item 2"))
NavigationLink(destination: Text("Item 3")) {
Text("Item 3")
}
}
.navigationTitle("Transactions")
}
.tabItem {
Label("Transactions", systemImage: "list.dash")
}
NavigationView {
List {
Text("Item 11")
Text("Item 12")
Text("Item 13")
}
.navigationTitle("Summary")
}
.tabItem {
Label("Summary", systemImage: "chart.line.uptrend.xyaxis")
}
}
}
}
Ok, I have changed the whole code to
//
// ContentView.swift
// TabTest
//
// Created by Max on 2022-05-04.
//
import SwiftUI
struct LoginView: View {
#Environment(\.presentationMode) var presentationMode
#State private var presentContent = false
var body: some View {
return NavigationView {
ZStack{
Button("Login") {
presentationMode.wrappedValue.dismiss()
}
}
}
}
}
struct ContentView: View {
#State private var isPresented = false
var body: some View {
TabView{
NavigationView{
List{
Text("Item 1")
Text("Item 2")
Text("Item 3")
}
.navigationTitle("Transactions")
.navigationBarBackButtonHidden(true)
}
.tabItem {
Image(systemName: "list.dash")
Text("Transactions")
}
NavigationView{
List{
Text("Item 11")
Text("Item 12")
Text("Item 13")
}
.navigationTitle("Summary")
.navigationBarBackButtonHidden(true)
}
.tabItem {
Image(systemName: "list.dash")
Text("Summary")
}
}
.onAppear{
self.isPresented = true
}
.fullScreenCover(isPresented: $isPresented, content: LoginView.init)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
and now it actually seems to work. Never have thought of fullScreenCover - thanks! :)
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")
}
}
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
Simple SwiftUI TabView with two tabs, with a simple Picker view used on each tab.
When the app starts, the Picker is visible and updates the variable.
Select the second tab, and the Picker vanishes.
let names = ["Fred", "Wilma", "Betty", "Barney"]
struct WordPickerView: View {
#State var kind: Int = 0
var body: some View {
VStack {
Text(names[kind])
Picker(selection: $kind, label: EmptyView()) {
ForEach(0 ..< names.count) {index in
Text(names[index]).tag(index)
}
}.pickerStyle(SegmentedPickerStyle())
}
}
}
struct ContentView: View {
#State private var selection = 0
var body: some View {
TabView(selection: $selection){
WordPickerView()
.font(.title)
.tabItem {
VStack {
Image("first")
Text("First")
}
}
.tag(0)
WordPickerView()
.font(.title)
.tabItem {
VStack {
Image("second")
Text("Second")
}
}
.tag(1)
}
}
}
In such cases (when you have absolutely equal views) it is better to make them unique with .id.
So your case is fixed, say, with the following
Picker(selection: $kind, label: EmptyView()) {
ForEach(0 ..< names.count) {index in
Text(names[index]).tag(index)
}
}
.pickerStyle(SegmentedPickerStyle())
.id(UUID().uuidString)