I am creating an app and I am using .searchable for my home view, but once it is clicked, I want it to bring up a new view where results of what is being searched is shown, and once the cancel button is clicked goes back to the home view.
I currently have .searchable(text: $searchText) and it is showing the search bar, and I have tried .overlay{SearchView()} but it is just putting it over the home view. Is there a way to do this.
You need to use the #Environment variable isSearching to determine which view to display, e.g.
struct ContentView: View {
#State private var searchText = ""
var body: some View {
NavigationView {
SearchingView(searchText: $searchText)
.searchable(text: $searchText, placement: .navigationBarDrawer(displayMode: .always), prompt: "Search")
.navigationTitle("Title")
}
}
}
struct SearchingView: View {
#Environment(\.isSearching) private var isSearching
#Binding var searchText: String
var body: some View {
if isSearching {
List("This is displayed when searching".components(separatedBy: " "), id: \.self) { word in
Text(word )
}
.listStyle(.plain)
} else {
Text("Here is the normal view")
}
}
}
I put the fieldtext in view called fieldtextmydesine and also put the button in view named login and I called fieldtextmydesin view and login view in contentview how do I print the field text value when I press the login button
So you want to use NavigationView and NavigationLink instead of a button.
struct ContentView: View {
#State var name: String = "Tim"
var body: some View {
NavigationView {
VStack {
TextField("Enter your name", text: $name)
Text("Hello, \(name)!")
NavigationLink(destination: SecondView(name: self.$name)){
Text("LogIn")
}
}
}
}
//Second ContenView
struct SecondView: View {
#Binding var name: String
var body: some View {
Text("Hello \(text)")
}
}
From what I understand from your question, you are trying to pass a value entered into a Text-Field from one View to another. If this is what your asking then this is the best solution.
This snippet can help you:
You can bind property to textfield like this
struct ContentView: View {
#State private var name: String = "Tim"
var body: some View {
VStack {
TextField("Enter your name", text: $name)
Text("Hello, \(name)!")
}
}
}
You can add button and print name on button tap line you need. You can pass name property to another text on tap. Or hide text view and show on tap and another ways
You can display print name either on the console or can display name in an alert. In the below snippet, to fetch name entered in text field on button click requires state variable instead of normal variable. It is created with #State keyword. State parameter manages the state in the View. So whenever there is change in state all the components that are associated with the state will be rendered again.
import SwiftUI
struct LoginUI: View {
#State var textName: String = ""
#State var showAlert = false
var body: some View {
VStack(alignment: .center, spacing: 2.0) {
TextField("Enter your name", text: $textName).padding(10)
Button(action: {
print("Entered name is \(self.textName)")
self.showAlert = true
}, label: {Text("Login")}).padding().background(Color.gray)
}
.padding(5.0)
.alert(isPresented: $showAlert) {
Alert(title: Text("Entered name is"), message: Text("\(self.textName)"))
}
}
}
struct LoginUI_Previews: PreviewProvider {
static var previews: some View {
LoginUI()
}
}
At tap "Show Modal" button in navigation bar, the modal is shown.
But, when "Dismiss" button is tapped, the modal never is showed.
If the modal is swiped, the error don't occurr.
import SwiftUI
struct ContentView: View {
#State var showModal = false
var body: some View {
NavigationView {
Text("Hello, World!")
.navigationBarItems(trailing: Button("Show Modal") {
self.showModal = true
})
}.sheet(isPresented: self.$showModal) {
Modal()
}
}
}
struct Modal: View {
#Environment(\.presentationMode) var mode
var body: some View {
NavigationView {
Text("Modal")
.navigationBarItems(leading: Button("Dismiss") {
self.mode.wrappedValue.dismiss()
})
}
}
}
You need to toggle off the showModal state. Something like this will work. I merged both views to demonstrate quickly
import SwiftUI
struct ContentView: View {
#State var showModal = false
#Environment(\.presentationMode) var mode
var body: some View {
NavigationView {
Text("Hello, World!")
.navigationBarItems(trailing: Button("Show Modal") {
self.showModal.toggle()
})
}.sheet(isPresented: self.$showModal) {
NavigationView {
Text("Modal")
.navigationBarItems(leading: Button("Dismiss") {
self.showModal.toggle()
self.mode.wrappedValue.dismiss()
})
}
}
}
}
I am attempting to dismiss a modal view presented via a .sheet in SwiftUI - called by a Button which is within a NavigationViews navigationBarItems, as per below:
struct ModalView : View {
#Environment(\.presentationMode) var presentationMode
var body: some View {
Button(action: {
self.presentationMode.value.dismiss()
}, label: { Text("Save")})
}
}
struct ContentView : View {
#State var showModal: Bool = false
var body: some View {
NavigationView {
Text("test")
.navigationBarTitle(Text("Navigation Title Text"))
.navigationBarItems(trailing:
Button(action: {
self.showModal = true
}, label: { Text("Add") })
.sheet(isPresented: $showModal, content: { ModalView() })
)
}
}
}
The modal does not dismiss when the Save button is tapped, it just remains on screen. The only way to get rid of it is swiping down on the modal.
Printing the value of self.presentationMode.value always shows false so it seems to think that it hasn't been presented.
This only happens when it is presented from the NavigationView. Take that out and it works fine.
Am I missing something here, or is this a beta issue?
You need to move the .sheet outside the Button.
NavigationView {
Text("test")
.navigationBarTitle(Text("Navigation Title Text"))
.navigationBarItems(trailing:
Button("Add") {
self.showModal = true
}
)
.sheet(isPresented: $showModal, content: { ModalView() })
}
You can even move it outside the NavigationView closure.
NavigationView {
Text("test")
.navigationBarTitle(Text("Navigation Title Text"))
.navigationBarItems(trailing:
Button("Add") { self.showModal = true }
)
}
.sheet(isPresented: $showModal, content: { ModalView() })
Notice you can also simplify the Button call if you have a simple text button.
The solution is not readily apparent in the documentation and most tutorials opt for simple solutions. But I really wanted a button in the NavigationBar of the sheet that would dismiss the sheet. Here is the solution in six steps:
Set the DetailView to not show.
Add a button to set the DetailView to show.
Call the .sheet(isPresented modifier to display the sheet.
Wrap the view that will appear in the sheet in a NavigationView because we want to display a .navigationBarItem button.
PresentationMode is required to dismiss the sheet view.
Add a button to the NavBar and call the dismiss method.
import SwiftUI
struct ContentView: View {
// 1
#State private var showingDetail = false
var body: some View {
VStack {
Text("Hello, world!")
.padding()
Button("Show Detail") {
showingDetail = true // 2
}
// 3
.sheet(isPresented: $showingDetail) {
// 4
NavigationView {
DetailView()
}
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
struct DetailView: View {
// 5
#Environment(\.presentationMode) var presentationMode
var body: some View {
Text("Detail View!")
// 6
.navigationBarItems(leading: Button(action: {
presentationMode.wrappedValue.dismiss()
}) {
Image(systemName: "x.circle")
.font(.headline)
.foregroundColor(.accentColor)
})
}
}
I want to add a custom navigation button that will look somewhat like this:
Now, I've written a custom BackButton view for this. When applying that view as leading navigation bar item, by doing:
.navigationBarItems(leading: BackButton())
...the navigation view looks like this:
I've played around with modifiers like:
.navigationBarItem(title: Text(""), titleDisplayMode: .automatic, hidesBackButton: true)
without any luck.
Question
How can I...
set a view used as custom back button in the navigation bar? OR:
programmatically pop the view back to its parent?
When going for this approach, I could hide the navigation bar altogether using .navigationBarHidden(true)
TL;DR
Use this to transition to your view:
NavigationLink(destination: SampleDetails()) {}
Add this to the view itself:
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
Then, in a button action or something, dismiss the view:
presentationMode.wrappedValue.dismiss()
Full code
From a parent, navigate using NavigationLink
NavigationLink(destination: SampleDetails()) {}
In DetailsView hide navigationBarBackButton and set custom back button to leading navigationBarItem,
struct SampleDetails: View {
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
var btnBack : some View { Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
HStack {
Image("ic_back") // set image here
.aspectRatio(contentMode: .fit)
.foregroundColor(.white)
Text("Go back")
}
}
}
var body: some View {
List {
Text("sample code")
}
.navigationBarBackButtonHidden(true)
.navigationBarItems(leading: btnBack)
}
}
SwiftUI 1.0
It looks like you can now combine the navigationBarBackButtonHidden and .navigationBarItems to get the effect you're trying to achieve.
Code
struct Navigation_CustomBackButton_Detail: View {
#Environment(\.presentationMode) var presentationMode
var body: some View {
ZStack {
Color("Theme3BackgroundColor")
VStack(spacing: 25) {
Image(systemName: "globe").font(.largeTitle)
Text("NavigationView").font(.largeTitle)
Text("Custom Back Button").foregroundColor(.gray)
HStack {
Image("NavBarBackButtonHidden")
Image(systemName: "plus")
Image("NavBarItems")
}
Text("Hide the system back button and then use the navigation bar items modifier to add your own.")
.frame(maxWidth: .infinity)
.padding()
.background(Color("Theme3ForegroundColor"))
.foregroundColor(Color("Theme3BackgroundColor"))
Spacer()
}
.font(.title)
.padding(.top, 50)
}
.navigationBarTitle(Text("Detail View"), displayMode: .inline)
.edgesIgnoringSafeArea(.bottom)
// Hide the system back button
.navigationBarBackButtonHidden(true)
// Add your custom back button here
.navigationBarItems(leading:
Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
HStack {
Image(systemName: "arrow.left.circle")
Text("Go Back")
}
})
}
}
Example
Here is what it looks like (excerpt from the "SwiftUI Views" book):
Based on other answers here, this is a simplified answer for Option 2 working for me in XCode 11.0:
struct DetailView: View {
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
var body: some View {
Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
Image(systemName: "gobackward").padding()
}
.navigationBarHidden(true)
}
}
Note: To get the NavigationBar to be hidden, I also needed to set and then hide the NavigationBar in ContentView.
struct ContentView: View {
var body: some View {
NavigationView {
VStack {
NavigationLink(destination: DetailView()) {
Text("Link").padding()
}
} // Main VStack
.navigationBarTitle("Home")
.navigationBarHidden(true)
} //NavigationView
}
}
Here's a more condensed version using principles shown in the other comments to change only the text of the button. The chevron.left icon can also be easily replaced with another icon.
Create your own button, then assign it using .navigationBarItems(). I found the following format most nearly approximated the default back button.
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
var backButton : some View {
Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
HStack(spacing: 0) {
Image(systemName: "chevron.left")
.font(.title2)
Text("Cancel")
}
}
}
Make sure you use .navigationBarBackButtonHidden(true) to hide the default button and replace it with your own!
List(series, id:\.self, selection: $selection) { series in
Text(series.SeriesLabel)
}
.navigationBarBackButtonHidden(true)
.navigationBarItems(leading: backButton)
iOS 15+
presentationMode.wrappedValue.dismiss() is now deprecated.
It's replaced by DismissAction
private struct SheetContents: View {
#Environment(\.dismiss) private var dismiss
var body: some View {
Button("Done") {
dismiss()
}
}
}
You can create a custom back button that will use this dismiss action
struct NavBackButton: View {
let dismiss: DismissAction
var body: some View {
Button {
dismiss()
} label: {
Image("...custom back button here")
}
}
}
then attach it to your view.
.navigationBarBackButtonHidden(true) // Hide default button
.navigationBarItems(leading: NavBackButton(dismiss: self.dismiss)) // Attach custom button
I expect you want to use custom back button in all navigable screens,
so I wrote custom wrapper based on #Ashish answer.
struct NavigationItemContainer<Content>: View where Content: View {
private let content: () -> Content
#Environment(\.presentationMode) var presentationMode
private var btnBack : some View { Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
HStack {
Image("back_icon") // set image here
.aspectRatio(contentMode: .fit)
.foregroundColor(.black)
Text("Go back")
}
}
}
var body: some View {
content()
.navigationBarBackButtonHidden(true)
.navigationBarItems(leading: btnBack)
}
init(#ViewBuilder content: #escaping () -> Content) {
self.content = content
}
}
Wrap screen content in NavigationItemContainer:
Usage:
struct CreateAccountScreenView: View {
var body: some View {
NavigationItemContainer {
VStack(spacing: 21) {
AppLogoView()
//...
}
}
}
}
Swiping is not disabled this way.
Works for me. XCode 11.3.1
Put this in your root View
init() {
UINavigationBar.appearance().isUserInteractionEnabled = false
UINavigationBar.appearance().backgroundColor = .clear
UINavigationBar.appearance().barTintColor = .clear
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().tintColor = .clear
}
And this in your child View
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
Button(action: {self.presentationMode.wrappedValue.dismiss()}) {
Image(systemName: "gobackward")
}
You can use UIAppearance for this:
if let image = UIImage(named: "back-button") {
UINavigationBar.appearance().backIndicatorImage = image
UINavigationBar.appearance().backIndicatorTransitionMaskImage = image
}
This should be added early on in your app like App.init. This also preserves the native swipe back functionality.
All of the solutions I see here seem to disable swipe to go back functionality to navigate to the previous page, so sharing a solution I found that maintains that functionality. You can make an extension of your root view and override your navigation style and call the function in the view initializer.
Sample View
struct SampleRootView: View {
init() {
overrideNavigationAppearance()
}
var body: some View {
Text("Hello, World!")
}
}
Extension
extension SampleRootView {
func overrideNavigationAppearance() {
let navigationBarAppearance = UINavigationBarAppearance()
let barAppearace = UINavigationBar.appearance()
barAppearace.tintColor = *desired UIColor for icon*
barAppearace.barTintColor = *desired UIColor for icon*
navigationBarAppearance.setBackIndicatorImage(*desired UIImage for custom icon*, transitionMaskImage: *desired UIImage for custom icon*)
UINavigationBar.appearance().standardAppearance = navigationBarAppearance
UINavigationBar.appearance().compactAppearance = navigationBarAppearance
UINavigationBar.appearance().scrollEdgeAppearance = navigationBarAppearance
}
}
The only downfall to this approach is I haven't found a way to remove/change the text associated with the custom back button.
Really simple method. Only two lines code 🔥
#Environment(\.presentationMode) var presentationMode
self.presentationMode.wrappedValue.dismiss()
Example:
import SwiftUI
struct FirstView: View {
#State var showSecondView = false
var body: some View {
NavigationLink(destination: SecondView(),isActive : self.$showSecondView){
Text("Push to Second View")
}
}
}
struct SecondView : View{
#Environment(\.presentationMode) var presentationMode
var body : some View {
Button(action:{ self.presentationMode.wrappedValue.dismiss() }){
Text("Go Back")
}
}
}
This solution works for iPhone. However, for iPad it won't work because of the splitView.
import SwiftUI
struct NavigationBackButton: View {
var title: Text?
#Environment(\.presentationMode) private var presentationMode: Binding<PresentationMode>
var body: some View {
ZStack {
VStack {
ZStack {
HStack {
Button(action: {
self.presentationMode.wrappedValue.dismiss()
}) {
Image(systemName: "chevron.left")
.font(.title)
.frame(width: 44, height: 44)
title
}
Spacer()
}
}
Spacer()
}
}
.zIndex(1)
.navigationBarTitle("")
.navigationBarHidden(true)
}
}
struct NavigationBackButton_Previews: PreviewProvider {
static var previews: some View {
NavigationBackButton()
}
}
I found this: https://ryanashcraft.me/swiftui-programmatic-navigation/
It does work, and it may lay the foundation for a state machine to control what is showing, but it is not a simple as it was before.
import Combine
import SwiftUI
struct DetailView: View {
var onDismiss: () -> Void
var body: some View {
Button(
"Here are details. Tap to go back.",
action: self.onDismiss
)
}
}
struct RootView: View {
var link: NavigationDestinationLink<DetailView>
var publisher: AnyPublisher<Void, Never>
init() {
let publisher = PassthroughSubject<Void, Never>()
self.link = NavigationDestinationLink(
DetailView(onDismiss: { publisher.send() }),
isDetail: false
)
self.publisher = publisher.eraseToAnyPublisher()
}
var body: some View {
VStack {
Button("I am root. Tap for more details.", action: {
self.link.presented?.value = true
})
}
.onReceive(publisher, perform: { _ in
self.link.presented?.value = false
})
}
}
struct ContentView: View {
var body: some View {
NavigationView {
RootView()
}
}
}
If you want to hide the button then you can replace the DetailView with this:
struct LocalDetailView: View {
var onDismiss: () -> Void
var body: some View {
Button(
"Here are details. Tap to go back.",
action: self.onDismiss
)
.navigationBarItems(leading: Text(""))
}
}
Just write this:
import SwiftUI
struct ContentView: View {
var body: some View {
NavigationView {
}.onAppear() {
UINavigationBar.appearance().tintColor = .clear
UINavigationBar.appearance().backIndicatorImage = UIImage(named: "back")?.withRenderingMode(.alwaysOriginal)
UINavigationBar.appearance().backIndicatorTransitionMaskImage = UIImage(named: "back")?.withRenderingMode(.alwaysOriginal)
}
}
}
On iOS 14+ it's actually very easy using presentationMode variable
In this example NewItemView will get dismissed on addItem completion:
struct NewItemView: View {
#State private var itemDescription:String = ""
#Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
var body: some View {
VStack {
TextEditor(text: $itemDescription)
}.onTapGesture {
hideKeyboard()
}.toolbar {
ToolbarItem {
Button(action: addItem){
Text("Save")
}
}
}.navigationTitle("Add Question")
}
private func addItem() {
// Add save logic
// ...
// Dismiss on complete
presentationMode.wrappedValue.dismiss()
}
private func hideKeyboard() {
UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
}
}
struct NewItemView_Previews: PreviewProvider {
static var previews: some View {
NewItemView()
}
}
In case you need the parent (Main) view:
struct SampleMainView: View {
#Environment(\.managedObjectContext) private var viewContext
#FetchRequest(
sortDescriptors: [NSSortDescriptor(keyPath: \DbQuestion.timestamp, ascending: true)],
animation: .default)
private var items: FetchedResults<Item>
var body: some View {
NavigationView {
List {
ForEach(items) { item in
NavigationLink {
Text("This is item detail page")
} label: {
Text("Item at \(item.id)")
}
}
}
.toolbar {
ToolbarItem {
// Creates a button on toolbar
NavigationLink {
// New Item Page
NewItemView()
} label: {
Text("Add item")
}
}
ToolbarItem(placement: .navigationBarTrailing) {
EditButton()
}
}.navigationTitle("Main Screen")
}
}
}