I am writing a simple watchOS app using SwiftUI but I am having issues to proper layout it.
This is the code:
struct ContentView: View {
var body: some View {
VStack(spacing: 0) {
HeaderView()
NavigationView {
ScrollView {
NavigationLink(destination: View1()) {
Text("View 1")
}
NavigationLink(destination: View2()) {
Text("View 2")
}
NavigationLink(destination: View2()) {
Text("View 3")
}
NavigationLink(destination: View2()) {
Text("View 4")
}
}
}
.navigationBarTitleDisplayMode(.inline)
}
}
}
struct HeaderView: View {
var body: some View {
VStack() {
Text("Header")
}
.frame(maxWidth: .infinity)
.background(Color.red)
}
}
struct View2: View {
var body: some View {
VStack {
Text("View 2 Content")
}
.navigationTitle("View 2")
.toolbar {
ToolbarItem(placement: .primaryAction) {
Button("+") {
}
}
}
}
}
Issues:
I cannot rid of this unused space
No matter what the "+" button shows up below the toolbar. I would like to have it in the shown position
I have a TabView with many items and I would like to hide the back button (<More) from the last one.
struct ExperimentView: View {
var body: some View {
TabView {
AView(label: "1")
.tabItem {
Label("Tab1", systemImage: "list.dash")
}
AView(label: "2")
.tabItem {
Label("Tab2", systemImage: "square.and.pencil")
}
AView(label: "3")
.tabItem {
Label("Tab3", systemImage: "pencil.slash")
}
AView(label: "4")
.tabItem {
Label("Tab4", systemImage: "scribble")
}
AView(label: "5")
.tabItem {
Label("Tab5", systemImage: "pencil.tip")
}
AView(label: "6")
.tabItem {
Label("Tab6", systemImage: "pencil.and.outline")
}
}
}
}
struct AView: View {
var label: String
var body: some View {
VStack {
Spacer()
Text(label)
Spacer()
}
}
}
I tried:
AView(label: "6")
.navigationBarTitle("")
.navigationBarBackButtonHidden(true)
.tabItem {
Label("Tab6", systemImage: "pencil.and.outline")
}
but it did't help.
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! :)
When using TabView in SwiftUI, what can I do to show the selected Tab like in the following picture?
I've tried creating a VStack within each tab like this:
struct ContentView: View {
#State public var tabViewSelection = 0
var body: some View {
TabView(selection: $tabViewSelection) {
HomeFirstLevel()
.tabItem {
VStack {
Image("HomeIcon")
Rectangle()
.frame(height: 7)
.foregroundColor((tabViewSelection == 0) ? .black : .clear)
}
}.tag(0)
}
}
}
But it's not working.
I can't even seem to add a Rectangle instead of an Image:
HomeFirstLevel()
.tabItem {
Rectangle()
}.tag(0)
Does TabView not accept shapes?
Thanks in advance for the help!
You can not set shape in tabItem. But you can use ZStack to add shape over the tab bar and set the x position.
Here is the demo.
struct ContentViewTabDemo: View {
#State public var tabViewSelection = 0
private var singleTabWidth = UIScreen.main.bounds.width / 5
var body: some View {
ZStack(alignment: .bottomLeading) {
TabView(selection: $tabViewSelection) {
Color.red
.tabItem {
VStack {
Image(systemName: "circle.fill")
}
}.tag(0)
Color.blue
.tabItem {
VStack {
Image(systemName: "heart.fill")
}
}.tag(1)
Color.red
.tabItem {
VStack {
Image(systemName: "circle.fill")
}
}.tag(2)
Color.blue
.tabItem {
VStack {
Image(systemName: "heart.fill")
}
}.tag(3)
Color.red
.tabItem {
VStack {
Image(systemName: "circle.fill")
}
}.tag(4)
}
Rectangle()
.offset(x: singleTabWidth * CGFloat(tabViewSelection))
.frame(width: singleTabWidth, height: 7)
.padding(.bottom, 2)
.animation(.default)
}
}
}
I have this TabBArViewController which has 5 tabs in it.
struct TabBarViewController: View {
#State private var selection = 3
var body: some View {
ZStack {
TabView(selection:$selection) {
OffersView()
.tabItem ({
Image(systemName: "bag").renderingMode(.template)
Text("Offers")
})
.tag(1)
BalanceView()
.tabItem ({
Image(systemName: "creditcard").renderingMode(.template)
Text("Balance")
})
.tag(2)
StepView()
.tabItem ({
Image(systemName: "figure.walk.circle").renderingMode(.template)
Text("Steps")
})
.tag(3)
FriendsView()
.tabItem {
Image(systemName: "person.2")
Text("Friends")
}
.tag(4)
ProfileView()
.tabItem {
Image(systemName: "person")
Text("Profile")
}
.tag(5)
}
.accentColor(Color("ColorOnboarding"))
.navigationBarBackButtonHidden(true)
}
.navigationBarBackButtonHidden(true)
}
}
which appears as so
I want to add a rectangle color to this when a tab bar icon selected in SwiftUI. How can I do it without creating a custom tab bar?