I want to set an image as the background of this TabBar
I tried by many way but it can't
I have found the default SwiftUI TabBar to be tricky to work with, but luckily it's not too hard to make a custom TabBar. This lets you add images or any other View as the "tabs."
Example Code:
struct ContentView: View {
#State var selectedTab: TabPicker.MenuTab = .first
var body: some View {
VStack {
Text("Hello, World!")
Spacer(minLength: 0)
HStack {
TabPicker(selectedTab: $selectedTab)
}
}
}
}
struct TabPicker: View {
enum MenuTab {
case first
case second
case third
}
#Binding var selectedTab: MenuTab
var body: some View {
HStack {
Spacer() // spacers ensure equal spacing between elements
Text("1") // change these to be whatever views you need
.fontWeight( selectedTab == .first ? .bold: .light) // some way of indicating which tab is selected
.onTapGesture { selectedTab = .first }
Spacer()
Text("2")
.fontWeight( selectedTab == .second ? .bold: .light)
.onTapGesture { selectedTab = .second }
Spacer()
Text("3")
.fontWeight( selectedTab == .third ? .bold: .light)
.onTapGesture { selectedTab = .third }
Spacer()
}
}
}
you have to set it as a #State var
like so:
#State var selectedTab: Int = 0
then:
TabView(selection: $selectedTab) {
YourView()
.tabItem{
VStack {
Text("First")
}
}.tag(0)
then create YourView
Related
I have created a simple View with a NavigationLink in a Section an when the user presses on it, the value of the variable should change and should navigate the next View simultaneously. But it doesn't work like it should. If I press the "Text", the Value changes, but no navigation. If I press the "empty Space" it navigates to the next View, but the value doesn't change.
If I out the NavigationLink in a "normal" View, it does work like it should.
Is there a way to get this working without SubViews?
#State private var newValue = -1
var body: some View {
NavigationView {
VStack {
Image(systemName: "globe")
.imageScale(.large)
.foregroundColor(.accentColor)
Text("\(newValue)")
List {
Section ("Navigationlink") {
NavigationLink(destination: EmptyView()) {
Text("to Emptyview")
}.simultaneousGesture(TapGesture().onEnded{
newValue = 100
})
}
}
}
}
}
}
struct EmptyView: View {
var body: some View {
VStack {
Image(systemName: "globe")
.imageScale(.large)
.foregroundColor(.accentColor)
Text("Hello, world!")
}
}
}
You need a #State for Navigation to take place, this is needed as a source of truth needs to change(including navigation) in SwiftUI for any View change to happen , you change the #State for newValue so it changes, but you need to do same for NavigationView, also try NavigationStack in place of NavigationView in future , try below code , good luck
struct ContentView: View {
#State private var newValue = -1
#State private var changeView = false
var body: some View {
NavigationView {
VStack {
Image(systemName: "globe")
.imageScale(.large)
.foregroundColor(.accentColor)
Text("\(newValue)")
List {
Section ("Navigationlink") {
NavigationLink(destination: EmptyView(), isActive: $changeView) {
Text("to Emptyview")
}.simultaneousGesture(TapGesture().onEnded{
newValue = 100
changeView = true
})
}
}
}
}
}
}
I am trying to use a tab bar in order to use different views. On some of those views I have a list of items and I wish that list to be .searchable. If I go to each of the views and search it works like a charm, but when I embed that in the tabbed view the list becomes non-responsive to click but it responds to scroll gesture.
I will expand the idea with code that I have and screenshots, but I am pretty sure that the problem resides in how I'm implementing the combination of the tab bar view and the views that have the searchable modifier:
This code works well
import SwiftUI
struct ClientListView: View {
#ObservedObject var viewModel = ClientFeedViewModel()
#State var searchText: String
#State private var showingSheet = false
#State private var showList = false
var clients: [Client] {
if searchText.count > 2 {
return searchText.isEmpty ? viewModel.clients : viewModel.search(withText: searchText)
}
return viewModel.clients
}
init(){
searchText = ""
}
var body: some View {
NavigationView {
List(clients) { client in
NavigationLink(destination: {
}, label: {
VStack {
Text(client.clientName)
}
})
.listRowSeparator(.hidden)
}
.searchable(text: $searchText)
.listStyle(.plain)
}
}
}
struct ClientListView_Previews: PreviewProvider {
static var previews: some View {
ClientListView()
}
}
The problem starts when I do this and implement the ClientListView in a tab bar view like this:
Tab bar with different views not working searchable modifier
This is the code of the Tab Bar View:
import SwiftUI
struct MainTabView: View {
#EnvironmentObject var viewModel: AuthViewModel
#Binding var selectedIndex: Int
var body: some View {
NavigationView {
VStack {
TabView(selection: $selectedIndex) {
ClientListView()
.onTapGesture {
selectedIndex = 0
}
.tabItem {
Label("Clients", systemImage: "list.bullet")
}.tag(0)
ProjectListView()
.onTapGesture {
selectedIndex = 1
}
.tabItem {
Image(systemName: "person")
Label("Projects", systemImage: "list.dash")
}.tag(1)
TaskListView()
.tabItem {
Image(systemName: "person")
Label("Tasks", systemImage: "list.dash")
}.tag(2)
.onTapGesture {
selectedIndex = 2
}
ClientListView()
.tabItem {
Label("Settings", systemImage: "gear")
}.tag(3)
.onTapGesture {
selectedIndex = 3
}
}
.navigationTitle(tabTitle)
}
.toolbar {
ToolbarItem(placement: .navigationBarLeading) {
Image("logo_silueta")
.resizable()
.scaledToFit()
.frame(width: 30, height: 30)
}
ToolbarItem(placement: .navigationBarTrailing) {
Button(action: {
viewModel.signOut()
}, label: {
Text("logout")
})
}
}
.navigationBarTitleDisplayMode(.inline)
}
}
var tabTitle: String {
switch selectedIndex {
case 0: return "Clients"
case 1: return "Projects"
case 2: return "Tasks"
case 3: return "Settings"
default: return ""
}
}
}
struct MainTabView_Previews: PreviewProvider {
static var previews: some View {
MainTabView(selectedIndex: .constant(0))
}
}
Navigation on the tabbed view works and displays the different names on the tab bar title, but when I click cancel or x button of the search bar, it doesn't work and also the list becomes unclickable
So far I haven't been able to find where the problem is but I am assuming its because the tab bar view is messing up with the searchable property
The culprit would seem to be your .onTapGesture modifiers, which will take precedence over any tap handling in your child views.
I'm not sure what value those modifiers bring, since using appropriate .tag values is enough for the tab view to keep track of its selected index. I'd start by removing them.
#ObservedObject var viewModel = ClientFeedViewModel() is a memory leak, try changing it to something like:
struct ClientListViewData {
var searchText: String = ""
var showingSheet = false
var showList = false
mutating func showSheet() {
showingSheet = true
}
}
struct ClientListView: View {
#Binding var data: ClientListViewData
I create a List to show my player information. but my List column didn't fit my cell view. The textfield that disappear in some column. This is strange because most of they has "-1" number. Is somebody know any reason may cause it happen? Demo video: https://youtu.be/vUo9zZZ5olo
struct SelectPlayerCellView: View {
#ObservedObject var player: PlayerGameData
#State var newuniformNumber: Int = 0
var body: some View {
HStack{
Button(action: {
self.player.isPlayer.toggle()
}){
if self.player.isPlayer{
Image(systemName: "checkmark.rectangle")
}
else{
Image(systemName: "rectangle")
}
}
TextField("\(player.uniformNumber)", value: $newuniformNumber, formatter: NumberFormatter())
.font(.system(size: 40))
.frame(width:55)
.padding(5)
Text(player.name)
}
.padding(.horizontal,8)
.cornerRadius(20)
}
}
I put my cell view in the list
struct SelectPlayerView: View {
#EnvironmentObject var teamResult : TeamResult
#ObservedObject var allPlayerList : PlayersGameData = PlayersGameData()
#State var goToNextPage : Bool = false
var selectedPlayerList : PlayersGameData = PlayersGameData()
var body: some View {
VStack {
List{
ForEach(allPlayerList.playersGameDataArray, id: \.userId) { (player) in
SelectPlayerCellView(player: player)
}.onMove(perform: move)
}
NavigationLink(destination: SelectStartingLineupView(selectedPlayerList: self.selectedPlayerList).environmentObject(teamResult),isActive: $goToNextPage){
EmptyView()
}
VStack (spacing: 10){
Button(action: {
self.createPlayersList()
self.goToNextPage.toggle()
}){
Image(systemName: "arrowshape.turn.up.right.circle")
}
}
}.onAppear(perform: getTeamMemberResults)
.onDisappear(perform: clearTeamMemberResults)
.navigationBarItems(trailing: EditButton())
}
I have a struct which shuffles and Lists records from CoreData.
I would like to reload / Refresh the List view with a Button.
I tried to use a function from within the Button.
Is there a way I can do this?
var body: some View {
VStack {
List {
ForEach(dictionary.shuffled().prefix(upTo: 10),id: \.self) { word in
HStack {
Text("\(word.englishWord)")
.foregroundColor(Color.blue)
Text("| \(word.urhoboWord) |")
.foregroundColor(Color.green)
Image(word.imageName)
.resizable()
.frame(width:40, height: 40)
}//HStack
}//End of ForEach
}//End of List
//Button to reload and shuffle list
Button(action: {}) {
Text("Shuffle")
.padding()
.background(Color.black)
.foregroundColor(Color.white)
.cornerRadius(6)
}
.navigationBarTitle(Text("Begin Learning"),displayMode: .inline)
Just trigger any value of the #State or #Published of #ObservableObject.
If you do not have such, just create one:
#State var refresh: Bool = false
func update() {
refresh.toggle()
}
You should move this dictionary.shuffled().prefix(upTo: 10) to your ViewModel and your view just reload base on the data.
Take a look at this code for reference:
struct SampleShuffleView : View {
#ObservedObject var viewModel : ShuffleViewModel = ShuffleViewModel()
var body : some View {
VStack {
List(self.viewModel.listData, id: \.self) { str in
Text(str)
}
Button(action: self.shuffle) {
Text("Shuffle me").padding()
}.background(Color.white).padding()
}
}
func shuffle() {
self.viewModel.shuffle()
}
}
class ShuffleViewModel : ObservableObject {
#Published var listData = ["one", "two", "three", "four"]
func shuffle() {
listData.shuffle()
//or listData = dictionary.shuffled().prefix(upTo: 10)
}
}
Note: All view's components will be reloaded when #ObservedObject changes, so consider to separate smaller view-viewmodel(s), or using #State variable.
Hope this helps.
Think about. To show array and shuffle on tap, do exactly what you would like to see. first show us the array in some "list" like manner and next shuffle it on user action.
struct ContentView: View {
#State var arr = ["ALFA", "BETA", "GAMA", "DELTA"]
var body: some View {
VStack {
VStack {
Divider()
ForEach(arr, id: \.self) { element in
VStack {
Text(element)
Divider()
}
}
}
Spacer()
Button(action: {
self.arr.shuffle()
}) {
Text("Shuffle")
}
Spacer()
}
}
}
arr.shuffle() changed the #State of View and force SwiftUI to "reload it" automatically.
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)
}
}