SwiftUI Change View with Edit Mode - swift

I try to change the view state according to edit mode, when is editing hide the view and when it's not editing show the view, when I use on change and print the edit mode value its work but its doesn't work when working with views.
struct TaskStateMark_Row: View {
#ObservedObject var task: Task
#Environment(\.editMode) private var editMode
var body: some View {
Group {
// Show and hide the view according to edit mode state
if let editMode = editMode?.wrappedValue {
if editMode == .inactive {
taskState
.onTapGesture(perform: onTapAction)
}
}
}
}
private var taskState: some View {
Group {
if task.isCompleted {
completedState
} else {
incompletedState
}
}
.frame(width: 44, height: 44)
}
private var incompletedState: some View {
ZStack{
fillCircle
circle
}
}
private var circle: some View {
Image(systemName: "circle")
.font(.system(size: 24))
.foregroundColor(task.wrappedPriority.color)
}
private var fillCircle: some View {
Image(systemName: "circle.fill")
.font(.system(size: 24))
.foregroundColor(task.wrappedPriority.color.opacity(0.15))
}
private var completedState: some View {
Image(systemName: "checkmark.circle.fill")
.symbolRenderingMode(.palette)
.foregroundStyle(.white, task.wrappedPriority.color)
.font(.system(size: 24))
}
}

I found the answer in the developer documentation in the follow link
https://developer.apple.com/documentation/swiftui/editmode
The code
#Environment(\.editMode) private var editMode
#State private var name = "Maria Ruiz"
var body: some View {
Form {
if editMode?.wrappedValue.isEditing == true {
TextField("Name", text: $name)
} else {
Text(name)
}
}
.animation(nil, value: editMode?.wrappedValue)
.toolbar { // Assumes embedding this view in a NavigationView.
EditButton()
}
}

Related

Binding a button leads to "Missing argument for parameter in call" error

I'm trying to create a Binding in two views so I can change something on one side and have it reflected on the other.
I basically have:
a circle on both views
a button to change the other view's circle color
and one to go to the other view
It all works fine if I only have a Binding in the "ColorChange2"
view, but when I add a Binding in "ColorChange1" I get into trouble.
It tells me: Missing argument for parameter 'isOn2'.
But when I add isOn2 into ColorChange1() it wants a binding, but if I do ColorChange1(isOn2: $isOn2) it says it can't find '$isOn2' in scope.
I found one solution suggesting to add .constant(true)) into the preview but since it's a constant, it wont change the view like I wanted since it's a constant.
What can I do to make it work?
Code:
struct ColorChange1: View {
#State private var isOn = false
#Binding var isOn2 : Bool
var body: some View {
NavigationView {
VStack {
Circle()
.fill(isOn ? .green : .red)
.frame(width: 100)
Button(action: {
isOn2.toggle()
}, label: {
Text("Change button view 2")
.padding()
})
NavigationLink(destination: {
ColorChange2(isOn: $isOn)
}, label: {
Text("Go to view 2")
})
}
}
}
}
struct ColorChange2: View {
#Binding var isOn : Bool
#State private var isOn2 = false
#Environment(\.dismiss) var dismiss
var body: some View {
VStack {
Circle()
.fill(isOn2 ? .green : .red)
.frame(width: 100)
Button(action: {
isOn.toggle()
}, label: {
Text("Change button view 1")
.padding()
})
Button(action: {
dismiss.callAsFunction()
}, label: {
Text("Go to view 1")
})
}
.navigationBarBackButtonHidden(true)
}
}
struct ColorChange_Previews: PreviewProvider {
static var previews: some View {
// ColorChange(isOn2: .constant(true))
ColorChange1()
}
} ```
You don't need both #Binding value in both screen to connect between screen like that.
#Binding means that get the value in #State of the first view and make a connection in the second view. In this scenero, when you go back from second view, it was dismissed.
For your problem, make an ObservableObject to store value. 1 for present in first view and 1 for second view. Then add it to second view when ever you need to display.
Code will be like this
class ColorModel : ObservableObject {
#Published var isOnFirstView = false
#Published var isOnSecondView = false
func didTapChangeColor(atFirstView: Bool) {
if atFirstView {
isOnSecondView = !isOnSecondView
} else {
isOnFirstView = !isOnFirstView
}
}
}
struct ColorChange2: View {
// binding model
#ObservedObject var colorModel : ColorModel
#Environment(\.dismiss) var dismiss
var body: some View {
VStack {
Circle()
.fill(colorModel.isOnSecondView ? .green : .red)
.frame(width: 100)
Button(action: {
colorModel.didTapChangeColor(atFirstView: false)
}, label: {
Text("Change button view 1")
.padding()
})
Button(action: {
dismiss.callAsFunction()
}, label: {
Text("Go to view 1")
})
}
.navigationBarBackButtonHidden(true)
}
}
struct ColorChange1: View {
#StateObject private var colorModel = ColorModel()
var body: some View {
NavigationView {
VStack {
Circle()
.fill(colorModel.isOnFirstView ? .green : .red)
.frame(width: 100)
Button(action: {
colorModel.didTapChangeColor(atFirstView: true)
}, label: {
Text("Change button view 2")
.padding()
})
NavigationLink(destination: {
ColorChange2(colorModel: colorModel)
}, label: {
Text("Go to view 2")
})
}
}
}
}
struct ColorChange_Previews: PreviewProvider {
static var previews: some View {
ColorChange1()
}
}

PopUp don't want to dismiss SwiftUI

I am having a problem while I want to dismiss a popup (that appears automatically depending on a specific condition) by clicking a button.
This is the PopUp struct:
struct dataPrivacyPopUp: View {
let model: OffersView.Model
let termsOfUseText = "Nutzungsbedingungen"
let privacyPolicyText = "Datenschutzerklärung"
#State var termsOfUseChecked = false
#State var privacyPolicyChecked = false
#State var buttonDisabled = true
#State private var showPopUp: Bool = false
#Binding var showModal: Bool
var body: some View {
ZStack {
if ( model.showPopUp == true) {
// PopUp Window
VStack(alignment: .center){
Image("logo")
.aspectRatio(contentMode: .fill)
.frame(alignment: .center)
.padding()
VStack(alignment: .leading) {
Text((model.acceptance?.salutation)!)
.multilineTextAlignment(.leading)
.padding()
.foregroundColor(Color.black)
Text((model.acceptance?.statement)!)
.multilineTextAlignment(.leading)
.padding()
.foregroundColor(Color.black)
Text((model.acceptance?.declarationIntro)!)
.multilineTextAlignment(.leading)
.padding()
.foregroundColor(Color.black)
if ((model.acceptance?.dpr)! == true) {
VStack(alignment: .leading){
HStack {
CheckBoxView(checked: $privacyPolicyChecked)
HStack(spacing: 0){
Text(R.string.localizable.dataPrivacyPopupText())
.foregroundColor(Color.black)
Button(privacyPolicyText) {
model.openUrl(url: API.privacyPolicyURL)
}
}
}
Text((model.acceptance?.declarationOutro)!)
.multilineTextAlignment(.leading)
.padding()
}
.padding()
Button(action: {
model.setTos()
print("showModal PopUpView2 1: \(showModal)")
self.showModal.toggle()
print("showModal PopUpView2 2: \(showModal)")
}, label: {
Text(R.string.localizable.dataPrivacyButton())
.foregroundColor(Color.white)
.font(Font.system(size: 23, weight: .semibold))
})
.disabled(model.buttonDisabledForOne(privacyPolicyChecked: privacyPolicyChecked, termsOfUseChecked: termsOfUseChecked))
.padding()
}
}
}
// .onAppear(perform: )
.background(Color.white01)
.padding()
}
}
}
}
and this is where I call it (contentView):
struct OffersView: View {
#StateObject var model = Model()
#State private var showingPopUp = false
#State private var showModal = false
#State private var showingAddUser = false
// var showPopup : Bool = true
var body: some View {
NavigationView {
Group {
switch model.sections {
case .loading:
ActivityIndicator(animate: true)
case .success(let sections):
ScrollView(.vertical) {
VStack(alignment: .leading, spacing: 0) {
Text(R.string.localizable.offersHello(model.firstName))
.aplFont(.headline02)
.padding(.bottom, 24)
VStack(spacing: 48) {
ForEach(sections) { section in
OffersSectionView(section: section, model: model)
}
}
}
.useFullWidth(alignment: .leading)
.padding()
}
default:
Color.clear
if ( model.showPopUp == true) {
ZStack {
Color.black.opacity(model.showPopUp ? 0.3 : 0).edgesIgnoringSafeArea(.all)
dataPrivacyPopUp(model: model, showModal: self.$showModal)
.onAppear(perform: {
self.showModal.toggle()
})
}
}
}
}
.navigationBarHidden(true)
.handleNavigation(model.navigationPublisher)
.onAppear(perform: model.onAppear)
.onDisappear(perform: model.onDisappear)
.environment(\.dynamicTypeEnabled, false)
.safariView(isPresented: model.showSafari) {
SafariView(url: model.safariUrl!)
}
}
}
}
I need help about this, I tried the traditional method to set a #Binding variable etc .. but that's not working, the boolean value is changing but the UI is not updating (the popup is not dismissing), thank you
I tried to look at your code - I suggest you simplify it to the bare minimum to exemplify your issue - and it seems that you are using 2 properties to show your pop-up: showingPopUp and showModal. It is quite likely that you are having trouble keeping them both in sync.
For starters, I would suggest to use only one variable, either it is true or false - "a man with two watches never knows what time it is".
For the solution:
If you prefer keeping your ZStack approach, the solution would look something like:
struct MyPrivacy: View {
#Binding var showMe: Bool
var body: some View {
VStack {
Text("The content of the pop-up")
.padding()
Button {
withAnimation {
showMe.toggle()
}
} label: {
Text("Dismiss")
}
}
}
}
struct Offers: View {
#State private var showPopup = false
var body: some View {
NavigationView {
ZStack {
VStack {
Text("View behind the pop-up")
.padding()
Button {
withAnimation {
showPopup.toggle()
}
} label: {
Text("Pop")
}
}
if showPopup {
Color.white
MyPrivacy(showMe: $showPopup)
}
}
}
}
}
If instead you want to go for a more flexible approach, if you are developing for iOS, SwiftUI has a convenient object - Sheets. You can use it as suggested in the documentation, or build a specific struct that manages all the modal views of this type and use your model to handle the presentation.
The process goes like:
Create a struct that will handle all kinds of Sheets of your app.
Add to your view-model the property to present any sheet.
Create the Views that will be the content of each sheet.
Call the .sheet(item:content:) method on each View the requires a sheet.
Here's the sample code:
SheetView handler:
struct SheetView: Identifiable {
// This struct controls what modal view will be presented.
// The enum SheetScreenType can grow to as many as different
// modal views your app needs - add the content in the switch below.
let id = UUID()
var screen: SheetScreenType
#ViewBuilder
var content: some View {
switch screen {
case .dataPrivacy:
DataPrivacy()
default:
EmptyView()
}
}
enum SheetScreenType {
case dataPrivacy
case none
}
}
Presenter in your view-model:
class MyViewModel: ObservableObject {
// This code can fit anywhere within your view-model.
// It controls the presentation of the modal view, which in
// this case is a Sheet.
private let sharedSheet = SheetView(screen: .none)
// Show the selected sheet
#Published var sheetView: SheetView?
var showSheet: SheetView.SheetScreenType {
get {
return sheetView?.screen ?? .none
}
set {
switch newValue {
case .none:
sheetView = nil
default:
sheetView = sharedSheet
}
sheetView?.screen = newValue
}
}
}
Content of your modal view:
struct DataPrivacy: View {
#EnvironmentObject var model: MyViewModel // Pass YOUR model here
var body: some View {
VStack(alignment: .center){
Text("Respecting your privacy, no details are shown here")
.padding()
Button {
print("Anything you need")
// Set the showSheet property of your model to
// present a modal view. Setting it to .none dismisses
// the modal view.
model.showSheet = .none
} label: {
Text("Time do dismiss the modal view")
}
.padding()
}
}
}
Enable your view to listen to your model to present the sheet:
struct OffersView: View {
#ObservedObject var model = MyViewModel() // Pass YOUR model here
var body: some View {
VStack {
Text("Anything you wish")
.padding()
Button {
withAnimation {
// Set the showSheet property of your model to
// present a modal view. Set it to any choice
// among the ones in the SheetScreen.SheetScreenType enum.
model.showSheet = .dataPrivacy
}
} label: {
Text("Tap here for the privacy in modal view")
}
}
// Show a modal sheet.
// Add this property at the top level of every view that
// requires a modal view presented - whatever content it might have.
.sheet(item: $model.sheetView) { sheet in
sheet.content
.environmentObject(model)
}
}
}
Good luck with your project!

Implementing Button in side menu

can someone Help me with fixing this. I want this code to work such as when I click the Home button on the side menu, it should take me to the Main View("This is the Main View"). I have tried using presenting sheets, however, presenting sheet doesn't look realistic. When the Home button is tapped, everything should disappear and only the Home Screen should come up with the side menu. I have tried writing up this code, however, I couldn't make the home button work. The codes are as below:
import SwiftUI
import Foundation
import Combine
struct Home: View {
#State var showMenu = false
#EnvironmentObject var userSettings: UserSettings
var body: some View {
let drag = DragGesture()
.onEnded {
if $0.translation.width < -100 {
withAnimation {
self.showMenu = false
}
}
}
return NavigationView {
GeometryReader {
geometry in
ZStack(alignment: .leading) {
MainView(showMenu: self.$showMenu)
.frame(width: geometry.size.width, height: geometry.size.height)
.offset(x: self.showMenu ? geometry.size.width/2 : 0)
.disabled(self.showMenu ? true : false)
if self.showMenu {
MenuView()
.frame(width: geometry.size.width/2)
.transition(.move(edge: .leading))
}
}
.gesture(drag)
}
.navigationBarTitle("Pay Data", displayMode: .inline)
.navigationBarItems(leading: (Button(action: {
withAnimation {
self.showMenu.toggle()
}
}){
Image(systemName: "line.horizontal.3")
.imageScale(.large)
}
))
}
}
}
struct MainView: View {
#Binding var showMenu: Bool
#EnvironmentObject var userSettings: UserSettings
var body: some View {
Text("This is Main View")
}
}
struct Home_Previews: PreviewProvider {
static var previews: some View {
Home()
.environmentObject(UserSettings())
}
}
//This is the Menu View. The Home Button is located in this view.
import SwiftUI
import Combine
import Foundation
struct MenuView: View {
#EnvironmentObject var userSettings: UserSettings
#State var showMenu = false
#State var Homevariable = false
var body: some View {
VStack(alignment: .leading) {
Button(action: {
UserDefaults.standard.set(false, forKey: "status")
}) {
(Text(Image(systemName: "rectangle.righthalf.inset.fill.arrow.right")) + (Text("Home")))
}
}
.padding()
.frame(maxWidth: .infinity, alignment: .leading)
.background(Color(red: 32/255, green: 32/255, blue: 32/255))
.edgesIgnoringSafeArea(.all)
}
}
struct MenuView_Previews: PreviewProvider {
static var previews: some View {
MenuView()
.environmentObject(UserSettings())
}
}
//This is the another view. I want the side Menu to appear on this as well, so when I press the Home button it takes me to the Main View("This is the Main View")
import SwiftUI
struct Calculation: View {
var body: some View {
Text("Hello, World!")
}
}
struct Calculation_Previews: PreviewProvider {
static var previews: some View {
Calculation()
}
}
Here you go. You are basically rebuilding a navigation logic, so in MainView you have to switch between the screens and put the side menu over it:
(PS: you can do without GeometryReader)
struct ContentView: View {
#State private var showMenu = false
#State private var selected: SelectedScreen = .home
var body: some View {
NavigationView {
ZStack {
// show selected screen
switch selected {
case .home:
MainView()
.disabled(self.showMenu ? true : false)
case .screen1:
OtherView(screen: 1)
case .screen2:
OtherView(screen: 2)
}
// put menu over it
if self.showMenu {
MenuView(showMenu: $showMenu, selected: $selected)
.transition(.move(edge: .leading))
}
}
.navigationBarTitle("Pay Data", displayMode: .inline)
// .navigationBarItems is deprecated, use .toolbar
.toolbar {
ToolbarItem(placement: .navigationBarLeading) {
Button {
withAnimation {
self.showMenu.toggle()
}
} label: {
Image(systemName: "line.horizontal.3")
.imageScale(.large)
}
}
}
}
}
}
enum SelectedScreen {
case home
case screen1
case screen2
}
struct MenuView: View {
#Binding var showMenu: Bool
#Binding var selected: SelectedScreen
var body: some View {
HStack {
VStack(alignment: .leading, spacing: 24) {
Button {
selected = .home
showMenu = false
} label: {
Label("Home", systemImage: "rectangle.righthalf.inset.fill.arrow.right")
}
Button {
selected = .screen1
showMenu = false
} label: {
Label("Screen 1", systemImage: "1.circle")
}
Button {
selected = .screen2
showMenu = false
} label: {
Label("Screen 2", systemImage: "2.circle")
}
}
.padding()
.frame(maxHeight: .infinity)
.background(Color(red: 32/255, green: 32/255, blue: 32/255))
Spacer()
}
}
}
struct MainView: View {
var body: some View {
Text("This is Main View")
.font(.largeTitle)
}
}
struct OtherView: View {
let screen: Int
var body: some View {
Text("Other View: Screen \(screen)")
.font(.largeTitle)
}
}

SwiftUI - Sheet Dismmis button not working

I want to add a button on the top of my view that will be the "X" to close the sheet. I am unable to use presentationmode option. For some reason it isn't working. Can someone please let me know how I can add a button that shows an "X" on the top that if I click on will close this view. Your help is very much appreciated.
import SwiftUI
struct TopicsExperienceCards: View {
// #Environment(\.presentationMode) var presentationMode
let etype: EItype
var body: some View {
NavigationView{
/* Alernatively Page Layout View */
ScrollView (.vertical, showsIndicators: false) {
Rectangle()
.fill(Color(etype.accentcolor))
.frame(width: 300, height: 5)
.padding()
GroupBox {
TabView {
ForEach(etype.content1,id: \.self) {item in
VStack (alignment:.center, spacing:0){
Text(item)
.padding()
.frame(width:300, height:300, alignment:.center)
Divider()
Spacer()
Text("Room for an image")
Spacer()
Spacer()
}
} //foreach
} //: TABVIEW
.tabViewStyle(PageTabViewStyle())
.onAppear {
setupAppearance() }
} //end of GroupBox
// .padding()
.frame(width:350, height:650)
.clipShape(RoundedRectangle(cornerRadius: 25.0, style: .circular))
.shadow(radius: 5)
} //end of ScrollView
.edgesIgnoringSafeArea(.all)
} //end of Navigation view
}
}
/* Function for the black dots in pagination */
func setupAppearance() {
UIPageControl.appearance().currentPageIndicatorTintColor = .black
UIPageControl.appearance().pageIndicatorTintColor = UIColor.black.withAlphaComponent(0.2)
}
struct TopicsExperienceCards_Previews: PreviewProvider {
static let etypes: [EItype] = Bundle.main.decode("eibasestructure.json")
static var previews: some View {
TopicsExperienceCards(etype:etypes[1])
}
}
You can just pass in the Binding that you use to present the sheet to TopicsExperienceCards as well.
struct ContentView: View {
#State var isPresented = false
var body: some View {
Button("Present") {
isPresented = true /// set Binding to true to present
}
.sheet(isPresented: $isPresented) {
TopicsExperienceCards(isPresented: $isPresented) /// pass Binding here
}
}
}
struct TopicsExperienceCards: View {
#Binding var isPresented: Bool
var body: some View {
VStack {
HStack {
Spacer()
Button(action: {
isPresented = false /// set Binding back to false
}) {
Image(systemName: "xmark")
.padding()
}
}
Spacer()
}
}
}
Result:

SwiftUI - Form Picker - How to prevent navigating back on selected?

I'm implementing Form and Picker with SwiftUI. There is a problem that it automatically navigates back to Form screen when I select a Picker option, how to keep it stay in selection screen?
Code:
struct ContentView: View {
#State private var selectedStrength = "Mild"
let strengths = ["Mild", "Medium", "Mature"]
var body: some View {
NavigationView {
Form {
Section {
Picker("Strength", selection: $selectedStrength) {
ForEach(strengths, id: \.self) {
Text($0)
}
}
}
}
.navigationTitle("Select your cheese")
}
}
}
Actual:
Expect: (sample from Iphone Settings)
You may have to make a custom view that mimics what the picker looks like:
struct ContentView: View {
let strengths = ["Mild", "Medium", "Mature"]
#State private var selectedStrength = "Mild"
var body: some View {
NavigationView {
Form {
Section {
NavigationLink(destination: CheesePickerView(strengths: strengths, selectedStrength: $selectedStrength)) {
HStack {
Text("Strength")
Spacer()
Text(selectedStrength)
.foregroundColor(.gray)
}
}
}
}
.navigationTitle("Select your cheese")
}
}
}
struct CheesePickerView: View {
let strengths: [String]
#Binding var selectedStrength: String
var body: some View {
Form {
Section {
ForEach(0..<strengths.count){ index in
HStack {
Button(action: {
selectedStrength = strengths[index]
}) {
HStack{
Text(strengths[index])
.foregroundColor(.black)
Spacer()
if selectedStrength == strengths[index] {
Image(systemName: "checkmark")
.foregroundColor(.blue)
}
}
}.buttonStyle(BorderlessButtonStyle())
}
}
}
}
}
}