I can't rewind the animation in SwiftUI - swiftui

I animated on Trim function, but after the animation is complete, I want the X mark to be drawn again. However, the X mark is not drawn again. What am I missing?
ContentView
struct ContentView: View {
#State var winningPlayer: UIBezierPath = .none
var body: some View {
VStack {
HStack {
ShapeView(bezier: .playerX, pathBounds: playerBounds)
.trim(from: 0, to: self.Xamount ? 1 : 0)
.stroke()
.frame(width: 50, height: 50)
Text("\(playerXScore)")
.font(.system(size: 30, weight: .bold, design: .rounded))
Spacer()
Text("\(playerOScore)")
.font(.system(size: 30, weight: .bold, design: .rounded))
ShapeView(bezier: .playerO, pathBounds: playerBounds)
.trim(from: 0, to: self.Oamount ? 1 : 0)
.stroke()
.frame(width: 50, height: 50)
}
}
.padding()
.onChange(of: winningPlayer, perform: { value in
if value == .playerX {
withAnimation(Animation.easeInOut(duration: 0.5).repeatCount(1)) {
self.Xamount.toggle()
}
}
})
}
}

You should use .animation also repeatCount should be 2:
also in your question body you said drawn again if you want just draw again then autoreverses: false but in your question title you said rewind in that case autoreverses: true
.animation(Xamount ? Animation.easeOut(duration: 0.5).repeatCount(1, autoreverses: false) : .none, value: Xamount)
.animation(Oamount ? Animation.easeOut(duration: 0.5).repeatCount(1, autoreverses: false) : .none, value: Oamount)
.onChange(of: winningPlayer, perform: { value in
if value == .playerX {
self.Xamount.toggle()
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + DispatchTimeInterval.milliseconds(100)) { Xamount = true }
}
else {
self.Oamount.toggle()
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + DispatchTimeInterval.milliseconds(100)) { Oamount = true }
}
})

WithAnimation I am making the Amount variables true again.
.animation(winningPlayer == .playerX ? Animation.easeOut(duration: 0.5).repeatCount(1, autoreverses: false) : .none, value: Xamount)
.animation(winningPlayer == .playerO ? Animation.easeOut(duration: 0.5).repeatCount(1, autoreverses: false) : .none, value: Oamount)
.onChange(of: winningPlayer, perform: { value in
if value == .playerX {
self.Xamount.toggle()
withAnimation(Animation.easeInOut(duration: 0.5).delay(1)) {
self.Xamount = true
}
} else {
self.Oamount.toggle()
withAnimation(Animation.easeInOut(duration: 0.5).delay(1)) {
self.Oamount = true
}
}
})

Related

resizable header in SwiftUI

I was trying to make resizable header but it breaks.
I am trying to clone twitter profile,
I think logic is right but can I know why this one is not working?
I made HStack and try to hide it but when I scroll back it can't come back.
Tried with GeometryReader
Please help me, thanks
import SwiftUI
struct ProfileView: View {
// change views
#State var isHide = false
#State private var selectionFilter: TweetFilterViewModel = .tweets
#Namespace var animation
var body: some View {
VStack(alignment: .leading) {
//hiding
if isHide == false {
headerView
actionButtons
userInfoDetails
}
tweetFilterBar
.padding(0)
ScrollView(showsIndicators: false) {
LazyVStack {
GeometryReader { reader -> AnyView in
let yAxis = reader.frame(in: .global).minY
let height = UIScreen.main.bounds.height / 2
if yAxis < height && !isHide {
DispatchQueue.main.async {
withAnimation {
isHide = true
}
}
}
if yAxis > 0 && isHide {
DispatchQueue.main.async {
withAnimation {
isHide = false
}
}
}
return AnyView(
Text("")
.frame(width: 0, height: 0)
)
}
.frame(width: 0, height: 0)
ForEach(0...9, id: \.self) { _ in
TweetRowView()
}
}
}
Spacer()
}
}
}
struct ProfileView_Previews: PreviewProvider {
static var previews: some View {
ProfileView()
}
}
extension ProfileView {
var headerView: some View {
ZStack(alignment: .bottomLeading) {
Color(.systemBlue)
.ignoresSafeArea()
VStack {
Button {
} label: {
Image(systemName: "arrow.left")
.resizable()
.frame(width: 20, height: 16)
.foregroundColor(.white)
.position(x: 30, y: 12)
}
}
Circle()
.frame(width: 72, height: 72)
.offset(x: 16, y: 24)
}.frame(height: 96)
}
var actionButtons: some View {
HStack(spacing: 12){
Spacer()
Image(systemName: "bell.badge")
.font(.title3)
.padding(6)
.overlay(Circle().stroke(Color.gray, lineWidth: 0.75))
Button {
} label: {
Text("Edit Profile")
.font(.subheadline).bold()
.accentColor(.black)
.padding(10)
.overlay(RoundedRectangle(cornerRadius: 20).stroke(Color.gray, lineWidth: 0.75))
}
}
.padding(.trailing)
}
var userInfoDetails: some View {
VStack(alignment: .leading) {
HStack(spacing: 4) {
Text("Heath Legdet")
.font(.title2).bold()
Image(systemName: "checkmark.seal.fill")
.foregroundColor(Color(.systemBlue))
}
.padding(.bottom, 2)
Text("#joker")
.font(.subheadline)
.foregroundColor(.gray)
Text("Your mom`s favorite villain")
.font(.subheadline)
.padding(.vertical)
HStack(spacing: 24) {
Label("Gothem.NY", systemImage: "mappin.and.ellipse")
Label("www.thejoker.com", systemImage: "link")
}
.font(.caption)
.foregroundColor(.gray)
HStack(spacing: 24) {
HStack {
Text("807")
.font(.subheadline)
.bold()
Text("following")
.font(.caption)
.foregroundColor(.gray)
}
HStack {
Text("200")
.font(.subheadline)
.bold()
Text("followers")
.font(.caption)
.foregroundColor(.gray)
}
}
.padding(.vertical)
}
.padding(.horizontal)
}
var tweetFilterBar: some View {
HStack {
ForEach(TweetFilterViewModel.allCases, id: \.rawValue) { item in
VStack {
Text(item.title)
.font(.subheadline)
.fontWeight(selectionFilter == item ? .semibold : .regular)
.foregroundColor(selectionFilter == item ? .black : .gray)
ZStack {
Capsule()
.fill(Color(.clear))
.frame(height: 3)
if selectionFilter == item {
Capsule()
.fill(Color(.systemBlue))
.frame(height: 3)
.matchedGeometryEffect(id: "filter", in: animation)
}
}
}
.onTapGesture {
withAnimation(.easeInOut) {
self.selectionFilter = item
}
}
}
}
}
}
While the animation between show and hide is running, the GeometryReader is still calculating values – which lets the view jump between show and hide – and gridlock.
You can introduce a new #State var isInTransition = false that checks if a show/hide animation is in progress and check for that. You set it to true at the beginning of the animation and to false 0.5 secs later.
Also I believe the switch height is not exactly 1/2 of the screen size.
So add a new state var:
#State var isInTransition = false
and in GeometryReader add:
GeometryReader { reader -> AnyView in
let yAxis = reader.frame(in: .global).minY
let height = UIScreen.main.bounds.height / 2
if yAxis < 350 && !isHide && !isInTransition {
DispatchQueue.main.async {
isInTransition = true
withAnimation {
isHide = true
}
}
// wait for animation to finish
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
isInTransition = false
}
} else if yAxis > 0 && isHide && !isInTransition {
DispatchQueue.main.async {
isInTransition = true
withAnimation {
isHide = false
}
}
// wait for animation to finish
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
isInTransition = false
}
}
return AnyView(
// displaying values for test purpose
Text("\(yAxis) - \(isInTransition ? "true" : "false")").foregroundColor(.red)
// .frame(width: 0, height: 0)
)
}

SwiftUI : How I can hide the navigationBar when the keyboard is shown

enter image description here
Please check attached image file, that is situation of mine.
I tried to make this view, but when the keyboard is shown. The main view and navigationBar is mixed.
I hope to hide the navigationBar when I touched the textfield and keyboard is shown.
How I treat that? Thank you all
This is source code below.
import SwiftUI
struct FlashCardView: View {
#EnvironmentObject var itemModel : ItemModel
var item : Item
#State var isGeneral : Bool = true
#State var inputAnswer : String = ""
#State var showAlert : Bool = false
#State var isAnswer : Bool = false
#State var randomWord : (String, String) = ("", "")
var body: some View {
VStack {
HStack {
if let group = item.group {
Text("Game with ' \(group) '")
.font(.title3.bold())
.lineLimit(1)
.padding()
.background(
Color.yellow
.frame(height : 4)
.offset(y : 24)
)
}
}
HStack {
Button(action: {
isGeneral = true
makeNewCard()
}, label: {
Text(isGeneral ? "General 🔥" : "General")
.font(.headline)
.foregroundColor(isGeneral ? .white : .black)
.frame(width : 140, height : 50)
.background(isGeneral ? .blue : .gray)
.cornerRadius(10)
.padding()
})
.shadow(color: .gray.opacity(0.5), radius: 3, x: 3, y: 3)
Spacer()
Button(action: {
isGeneral = false
makeNewCard()
}, label: {
Text(!isGeneral ? "Favorite 🔥" : "Favorite")
.font(.headline)
.foregroundColor(!isGeneral ? .white : .black)
.frame(width : 140, height : 50)
.multilineTextAlignment(.center)
.background(!isGeneral ? .blue : .gray)
.cornerRadius(10)
.padding()
})
.disabled(item.children.filter({$0.isFavorite}).isEmpty)
.shadow(color: .gray.opacity(0.5), radius: 3, x: 3, y: 3)
}
Text(randomWord.0)
.font(.title2.bold())
.frame(maxWidth : .infinity)
.frame(height : UIScreen.main.bounds.height*0.33)
.multilineTextAlignment(.center)
.background(.ultraThinMaterial)
.cornerRadius(20)
.shadow(color: .gray.opacity(0.4), radius: 3, x: 3, y: 3)
.padding()
TextField("What is the answer?", text: $inputAnswer)
.frame(maxWidth : .infinity)
.frame(height : 60)
.font(.body)
.multilineTextAlignment(.center)
.autocapitalization(.none)
.submitLabel(.done)
.onSubmit {
if randomWord.1 == inputAnswer {
self.showAlert.toggle()
self.isAnswer = true
self.inputAnswer = ""
} else {
self.showAlert.toggle()
self.isAnswer = false
self.inputAnswer = ""
}
}
Divider()
.padding(.horizontal)
.padding(.vertical, -10)
Button(action: {
if randomWord.1 == inputAnswer {
self.showAlert.toggle()
self.isAnswer = true
self.inputAnswer = ""
} else {
self.showAlert.toggle()
self.isAnswer = false
self.inputAnswer = ""
}
}, label: {
Label("Check", systemImage: "checkmark.rectangle.fill")
.frame(maxWidth : .infinity)
.frame(height : 60)
.font(.headline)
.foregroundColor(.white)
.multilineTextAlignment(.center)
.background(Color.green)
.cornerRadius(10)
.shadow(color: .gray.opacity(0.4), radius: 3, x: 3, y: 3)
.padding()
})
.alert(isPresented : $showAlert) {
Alert(title: Text(isAnswer ? "Nice! that is answer!" : "Sorry, It was not answer.."), message: Text(isAnswer ? "You got an answer! Cool! 🥰" : "It's OK!, Keep studying! 😋"), dismissButton: .default(Text("OK")) {
makeNewCard()
})
}
.disabled(inputAnswer.count == 0)
} // vst
.padding()
.onAppear {
makeNewCard()
}
.navigationTitle("Flashcard Game 🎲")
}
}
extension FlashCardView {
func makeNewCard() {
if isGeneral == true {
randomWord = itemModel.makeRandomChildren(item: item)
} else {
randomWord = itemModel.makeRandomFavoriteChildren(item: item)
}
}
}
Add onEditingChanged to the keyboard and add a conditional to the navBar.
If the navBar doesn't hide when the user answers the question, add another toggle to onCommit.
import SwiftUI
struct ContentView: View {
#State var inputAnswer: String = ""
#State var isTyping: Bool = false
var body: some View {
NavigationView {
VStack(alignment: .center) {
Text("Hide navbar when user interacts with the textField")
.padding()
TextField("What is the answer?", text: $inputAnswer, onEditingChanged: {
self.isTyping = $0 // <= Toggle boolean if user interacts with the textField
})
.keyboardType(.default)
}
.navigationTitle("Home")
.navigationBarHidden(isTyping ? true : false) // <= hide on the condition of the boolean
}
}
}

Pass to Another View after Success View Appears

After seeing the popup view that says your credit card saved successfully. I want to see this popup for 2-3 seconds then to pass another view called AddressView. Maybe it is irrelevant but I also added that popup view and the name is SuccessCardView.
#State private(set) var successAlert = false
ZStack {
HStack {
Button(action: {
self.isListTapped.toggle()
}, label: { CustomButton(title: "Listeden Sec", icon: .none, status: .enable, width: 150)})
Button(action: {
self.isSaved.toggle()
self.creditCards.append(self.creditCard)
print(self.creditCards[0].cardNumber)
if self.creditCards[0].cardNumber == "" {
self.showingAlert = true
} else if self.creditCards[0].cardNumber.count == 16 {
self.successAlert = true
}
}, label: { CustomButton(title: "Kaydet", icon: .none, status: .enable, width: 150)})
.alert(isPresented: $showingAlert) {
Alert(title: Text("Kart Bilgileri Hatali"), message: Text("Tekrar Kontrol Edin"), dismissButton: .default(Text("Got it!")))
}
}
SuccessCardView(isShown: $successAlert) // I want to show that view than jump to another view
}
struct SuccessCardView: View {
#Binding var isShown: Bool
#State var viewState = CGSize.zero
var body: some View {
VStack {
ZStack {
Rectangle()
.foregroundColor(Color(#colorLiteral(red: 0, green: 0.6588235294, blue: 0.5254901961, alpha: 1)))
.cornerRadius(10)
.frame(width: 355, height: 76)
HStack {
VStack(alignment: .leading) {
Text("Tebrikler!")
.font(Font.custom("SFCompactDisplay-Bold", size: 16))
.foregroundColor(.white)
Text("Kart Basariyla Eklendi")
.font(Font.custom("SFCompactDisplay", size: 14))
.foregroundColor(.white)
}
.offset(x: -70)
}
}
Spacer()
}
.offset(y: isShown ? .zero : -UIScreen.main.bounds.size.height)
.offset(y: viewState.height )
.animation(.spring(response: 0.5, dampingFraction: 0.6, blendDuration: 0))
.offset(y: -100)
}
}
It is not clear where/how is AddressView configured, but you can do the following
} else if self.creditCards[0].cardNumber.count == 16 {
self.successAlert = true
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
self.successAlert = false // hide popup
self.showAddressView = true // eg. activate navigation link
}
}

NavigationView + TextField Background

I'm currently learning SwiftUI and building a todo list app. On the ContentView screen I've got a NavigationView and a button that pops up an "add new task" textfield into the list. I suspect this is not the correct way to implement this but when the textfield shows up the background color doesn't persist. For the life of me I can't figure out how to set the background color. If I move the textfield outside the NavigationView I can set the background but when the NavigationView shifts to make space for the textfield I get a bunch of black screen flicker. Any thoughts on how I can set the background color on the textfield when added to the list or fix the screen flicker when I move it out? Appreciate the help.
import SwiftUI
import UIKit
struct ContentView: View {
#Environment(\.managedObjectContext) var managedObjectContext
#FetchRequest(entity: ToDoItem.entity(), sortDescriptors: [NSSortDescriptor(key: "order", ascending: true)]) var listItems: FetchedResults<ToDoItem>
#State private var newToDoItem = ""
#State private var showNewTask = false
#State var isEditing = false
#State var showTaskView = false
#State var bottomState = CGSize.zero
#State var showFull = false
#State var deleteButton = false
//this removes the lines in the list view
init() {
// To remove only extra separators below the list:
UITableView.appearance().tableFooterView = UIView()
// To remove all separators including the actual ones:
UITableView.appearance().separatorStyle = .none
UIScrollView.appearance().backgroundColor = .clear
//UITableView.appearance().backgroundColor = .clear
}
var body: some View {
ZStack{
VStack{
TitleView()
NavigationView {
List {
if showNewTask {
HStack{
TextField("New task", text: self.$newToDoItem, onEditingChanged: { (changed) in
}) {
print("onCommit")
self.addTask(taskTitle: self.newToDoItem)
self.saveTasks()
self.showNewTask.toggle()
self.newToDoItem = ""
}
.font(Font.system(size: 18, weight: .bold))
.foregroundColor(Color("Text"))
Button(action: {
self.newToDoItem = ""
self.showNewTask.toggle()
}) {
Image(systemName: "xmark.circle").foregroundColor(Color("button"))
.font(Font.system(size: 18, weight: .bold))
}
}
.padding(EdgeInsets(top: 8, leading: 6, bottom: 8, trailing: 6))
.background(Color("addNewTask"))
.cornerRadius(10.0)
}
ForEach(listItems, id: \.self) {item in
HStack {
Button(action: {
item.isComplete = true
self.saveTasks()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5){
self.deleteTaskTest(item: item)
}
}) {
if (item.isComplete) {
Image(systemName: "checkmark.circle")
.font(Font.system(size: 25, weight: .bold))
.foregroundColor(Color(#colorLiteral(red: 0.1616941956, green: 0.9244045403, blue: 0.1405039469, alpha: 1)))
.padding(.trailing, 4)
} else {
Image(systemName: "circle")
.font(Font.system(size: 25, weight: .bold))
.foregroundColor(Color("button"))
.padding(.trailing, 4)
}
}
.buttonStyle(PlainButtonStyle())
ToDoItemView(title: item.title, createdAt: "\(item.createdAt)")
.onTapGesture {
self.showTaskView.toggle()
}
.onLongPressGesture(minimumDuration: 0.1) {
self.isEditing.toggle()
print("this is a long press test")
}
}
.listRowBackground(Color("background"))
}
.onMove(perform: moveItem)
.onDelete(perform: deleteTask)
}
.environment(\.editMode, .constant(self.isEditing ? EditMode.active : EditMode.inactive)).animation(Animation.spring())
.navigationBarTitle(Text("ToDay"), displayMode: .large)
.navigationBarHidden(true)
.background(Color("background"))
}
//ADD A NEW TASK BUTTON
HStack {
Spacer()
Button(action: {
self.showNewTask.toggle()
}) {
Image(systemName: "plus")
.font(.system(size: 18, weight: .bold))
.frame(width: 36, height: 36)
.background(Color("button"))
.foregroundColor(.white)
.clipShape(Circle())
.shadow(color: Color.black.opacity(0.2), radius: 5, x: 0, y: 5)
}
}
.padding()
}
.blur(radius: showTaskView ? 20 : 0)
.animation(.default)
.padding(.top, 30)
//BOTTOM CARD VIEW
TaskView()
.offset(x: 0, y: showTaskView ? 360 : 1000)
.offset(y: bottomState.height)
.animation(.timingCurve(0.2, 0.8, 0.2, 1, duration: 0.5))
.gesture(
DragGesture().onChanged { value in
self.bottomState = value.translation
if self.showFull {
self.bottomState.height += -300
}
if self.bottomState.height < -300 {
self.bottomState.height = -300
}
} .onEnded { value in
if self.bottomState.height > 50 {
self.showTaskView = false
}
if (self.bottomState.height < -100 && !self.showFull) || (self.bottomState.height < -250 && self.showFull){
self.bottomState.height = -300
self.showFull = true
} else {
self.bottomState = .zero
self.showFull = false
}
}
)
}
.background(Color("background").edgesIgnoringSafeArea(.all))
}
Finally got it to work. For whatever reason reworking the stacks fixed it.
struct ContentView: View {
#Environment(\.managedObjectContext) var managedObjectContext
#FetchRequest(entity: ToDoItem.entity(), sortDescriptors: [NSSortDescriptor(key: "order", ascending: true)]) var listItems: FetchedResults<ToDoItem>
#State private var showCancelButton: Bool = false
#State private var newToDoItem = ""
#State private var showNewTask = false
#State var isEditing = false
#State var showTaskView = false
#State var bottomState = CGSize.zero
#State var showFull = false
#State var deleteButton = false
var itemName = ""
init() {
// To remove all separators including the actual ones:
UITableView.appearance().separatorStyle = .none
UITableView.appearance().backgroundColor = .clear
}
var body: some View {
ZStack {
VStack {
NavigationView {
VStack {
TitleView()
.padding(.top, 20)
.background(Color("background"))
// Enter new task view
if showNewTask {
HStack {
HStack {
TextField("New task", text: self.$newToDoItem, onEditingChanged: { (changed) in
}) {
self.addTask(taskTitle: self.newToDoItem)
self.saveTasks()
self.showNewTask.toggle()
self.newToDoItem = ""
}
.font(Font.system(size: 18, weight: .bold))
.foregroundColor(Color("Text"))
Button(action: {
self.newToDoItem = ""
self.showNewTask.toggle()
}) {
Image(systemName: "xmark.circle").foregroundColor(Color("button"))
.font(Font.system(size: 18, weight: .bold))
}
}
.padding(EdgeInsets(top: 8, leading: 6, bottom: 8, trailing: 6))
.background(Color("addNewTask"))
.cornerRadius(10.0)
}
.background(Color("background"))
.padding(.horizontal)
}
List {
ForEach(listItems, id: \.self) {item in
HStack {
Button(action: {
item.isComplete = true
self.saveTasks()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5){
self.deleteTaskTest(item: item)
}
}) {
if (item.isComplete) {
Image(systemName: "checkmark.circle")
.font(Font.system(size: 25, weight: .bold))
.foregroundColor(Color(#colorLiteral(red: 0.1616941956, green: 0.9244045403, blue: 0.1405039469, alpha: 1)))
.padding(.trailing, 4)
} else {
Image(systemName: "circle")
.font(Font.system(size: 25, weight: .bold))
.foregroundColor(Color("button"))
.padding(.trailing, 4)
}
}
.buttonStyle(PlainButtonStyle())
ToDoItemView(title: item.title, createdAt: "\(item.createdAt)")
.onTapGesture {
//item.title = self.itemName
self.showTaskView.toggle()
}
.onLongPressGesture(minimumDuration: 0.1) {
self.isEditing.toggle()
print("this is a long press test")
}
}
.listRowBackground(Color("background"))
}
.onMove(perform: moveItem)
.onDelete(perform: deleteTask)
}
.environment(\.editMode, .constant(self.isEditing ? EditMode.active : EditMode.inactive)).animation(Animation.spring())
.navigationBarTitle(Text("ToDay"), displayMode: .large)
.navigationBarHidden(true)
.background(Color("background"))
}
.background(Color("background").edgesIgnoringSafeArea(.all))
}
HStack {
Spacer()
Button(action: {
//withAnimation(){
self.showNewTask.toggle()
//}
}) {
Image(systemName: "plus")
.font(.system(size: 18, weight: .bold))
.frame(width: 36, height: 36)
.background(Color("button"))
.foregroundColor(.white)
.clipShape(Circle())
.shadow(color: Color.black.opacity(0.2), radius: 5, x: 0, y: 5)
}
}
.padding()
}
.blur(radius: showTaskView ? 20 : 0)
//BOTTOM CARD VIEW
TaskView()
.offset(x: 0, y: showTaskView ? 360 : 1000)
.offset(y: bottomState.height)
.animation(.timingCurve(0.2, 0.8, 0.2, 1, duration: 0.5))
.gesture(
DragGesture().onChanged { value in
self.bottomState = value.translation
if self.showFull {
self.bottomState.height += -300
}
if self.bottomState.height < -300 {
self.bottomState.height = -300
}
} .onEnded { value in
if self.bottomState.height > 50 {
self.showTaskView = false
}
if (self.bottomState.height < -100 && !self.showFull) || (self.bottomState.height < -250 && self.showFull){
self.bottomState.height = -300
self.showFull = true
} else {
self.bottomState = .zero
self.showFull = false
}
}
)
}
.animation(.default)
.background(Color("background").edgesIgnoringSafeArea(.all))
}
func moveItem(indexSet: IndexSet, destination: Int){
let source = indexSet.first!
if source < destination {
var startIndex = source + 1
let endIndex = destination - 1
var startOrder = listItems[source].order
while startIndex <= endIndex {
listItems[startIndex].order = startOrder
startOrder = startOrder + 1
startIndex = startIndex + 1
}
listItems[source].order = startOrder
} else if destination < source {
var startIndex = destination
let endIndex = source - 1
var startOrder = listItems[destination].order + 1
let newOrder = listItems[destination].order
while startIndex <= endIndex {
listItems[startIndex].order = startOrder
startOrder = startOrder + 1
startIndex = startIndex + 1
}
listItems[source].order = newOrder
}
saveTasks()
self.isEditing.toggle()
}
func deleteTask(indexSet: IndexSet){
let source = indexSet.first!
let listItem = listItems[source]
//self.deleteButton.toggle()
managedObjectContext.delete(listItem)
saveTasks()
}
func deleteTaskTest(item: ToDoItem){
managedObjectContext.delete(item)
saveTasks()
}
func addTask(taskTitle: String) {
let newTask = ToDoItem(context: managedObjectContext)
newTask.title = taskTitle
newTask.order = (listItems.last?.order ?? 0) + 1
newTask.createdAt = Date()
}
func saveTasks() {
do {
try managedObjectContext.save()
} catch {
print(error)
}
}

How to use UserDefault on an Array in SwiftUI

I'm working on a checklist app that has several arrays with checks. I'd like to save the state if a users closes/quits the app. I was thinking of using the UserDefault methods for this:
HStack {
ForEach(0 ..< checklist.steps) { index in
VStack {
Button(action: {
self.checked[index].toggle()
UserDefaults.standard.set(self.checked[index], forKey: "Check")
I'm currently using the following state for checks:
#State private var checked = [false, false, false, false, false, false]
Does anyone know how to apply UserDefaults for arrays or generally how to save the state for your app when closing it?
Thanks in advance!
try this: (it is the code from last time ;)) i think the true/false settings itself is not correct, but the saving / loading works ;)
struct ChecklistView: View {
var checklist: Checklist
#State var currentProgress: Float = 0.0
#State var checked : [Bool] = [false, false, false, false]
init(checklist: Checklist) {
self.checklist = checklist
}
func saveUserDefaults() {
var value = ""
for eachValue in checked {
if eachValue == true { value += "1" }
else { value += "0" }
}
UserDefaults.standard.set(value, forKey: checklist.title)
}
var body: some View {
ZStack(alignment: .leading) {
// RoundedRectangle(cornerRadius: 20)
// .foregroundColor(.red).opacity(0.5)
// .frame(width: 200)
VStack {
HStack(alignment: .top) {
checklist.image
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 40, height: 40)
.padding(.trailing)
VStack(alignment: .leading) {
Text(checklist.title)
.font(.system(size: 16, weight: .medium))
.padding(.bottom, 4)
Text(checklist.instruction.uppercased()).font(.system(size: 12))
HStack {
ForEach(0 ..< checklist.steps) { index in
VStack {
Button(action: {
self.checked[index].toggle()
print(self.checked)
self.saveUserDefaults()
}) {
ZStack {
RoundedRectangle(cornerRadius: 8)
.foregroundColor(self.checked[index] ? Color("LightGreen") : .gray )
.frame(width: 40, height: 40)
Image(systemName: self.checked[index] ? "checkmark" : "plus")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 16, height: 16)
.foregroundColor(self.checked[index] ? .white : .white)
}
}
}
}
}
}
}.frame(width: 350, alignment: .leading)
}
}
.onAppear() {
if let values = UserDefaults.standard.value(forKey: self.checklist.title) as? String {
self.checked = values.map {
if $0 == "1" { return true }
return false
}
}
print(self.checked)
}
.frame(width: 350)
.padding(.bottom, 16)
.cornerRadius(8)
.padding(.top, 20)
}
}
I haven't test that solution, but can't you store your array in your NSUserdefaults after every button action?
Button(action: {
self.checked[index].toggle()
UserDefaults.standard.set(self.checked, forKey: "Check")
Probably, the best solution would be using CoreData for that, which would be very easier to use.
PS: I can test that solution later on.. not at my Mac right now