How to save the answers of a specific user to his profile in the questionnaire app (SwiftUI)? - swift

Question

I am creating an app for parents or guardians of autistic children. In the app, you can create profiles for several kids and then click on the "Start Questionnaire" button in the personal card of each child. When the questionnaire page opens, there the parent answers several questions in several categories, where the questions from each category have a different weight (1, 2, 3, 4). At the end of the questionnaire, these answers are recorded in the profile of a particular kid in order to display a graph of his progress based on the answers on his personal page.
My question is that I can't figure out how to save answers to a specific kid's profile. To store profiles of children, I use CoreData, where there are four attributes: name, birthdate, dateCreated and answers. I assigned the Binary Data type to the latter. I created a #State variable in the QuestionnairePageView file and specified its type as [[String:Int]] to store a question category as a String (1, 2, 3 or 4) and an answer as an Int (yes = 1 or no = 0). Also in that file I created a saveAnswers function that assigns questionnaire answers to that #State variable when the user taps End Questionnaire button.
However, it didn't work. Please help me to understand the issue.
My data manager:
import SwiftUI
import CoreData
class CoreDataManager {
let container: NSPersistentContainer
static let shared: CoreDataManager = CoreDataManager()
private init() {
container = NSPersistentContainer(name: "PersonModel")
container.loadPersistentStores { description, error in
if let error = error {
fatalError("Unable to initialize Core Data \(error)")
}
}
}
}
My QuestinarrieApp file:
import SwiftUI
#main
struct QuestinarrieApp: App {
let controller = CoreDataManager.shared.container
var body: some Scene {
WindowGroup {
ContentView()
.environment(\.managedObjectContext, controller.viewContext)
}
}
}
My ContentView:
import SwiftUI
import CoreData
struct ContentView: View {
#State private var isShowingAddPersonPage: Bool = false
#Environment(\.managedObjectContext) private var viewContext
#FetchRequest(fetchRequest: Person.ownFetchRequest)
var persons: FetchedResults<Person>
var body: some View {
NavigationView {
ScrollView(.vertical, showsIndicators: false) {
VStack(spacing: 10) {
ForEach(persons) { person in
let age = "\(calculateAge(fromDate: person.birthdate ?? Date()))"
NavigationLink {
PersonalPageView(person: person, name: person.name ?? "Noname", age: age)
} label: {
HStack {
Text(person.name ?? "Noname").font(.title2.bold())
Spacer()
Text(age + " years old").font(.body.bold())
}
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
.padding(.horizontal)
}
}
}
}
.navigationTitle("Persons")
.toolbar {
ToolbarItem(placement: .navigationBarTrailing) {
Button(action: {
isShowingAddPersonPage = true
}) {
Image(systemName: "plus.circle")
} //: BUTTON
.sheet(isPresented: $isShowingAddPersonPage) {
AddPersonView()
}
}
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
let container = CoreDataManager.shared.container
ContentView()
.environment(\.managedObjectContext, container.viewContext)
}
}
My AddPersonView file:
import SwiftUI
struct AddPersonView: View {
#Environment(\.presentationMode) var presentationMode
#Environment(\.managedObjectContext) private var viewContext
#State private var name: String = ""
#State private var birthdate: Date = Date()
var body: some View {
NavigationView {
VStack(spacing: 10) {
// MARK: - NAME
HStack(spacing: 12) {
Image(systemName: "person.text.rectangle")
.resizable()
.renderingMode(.template)
.scaledToFit()
.frame(width: 25, height: 25)
TextField("Name", text: $name)
} //: HSTACK
.padding(.horizontal)
.frame(height: 60)
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
// MARK: - BIRTH DATE
HStack(spacing: 12) {
Image(systemName: "calendar")
.resizable()
.renderingMode(.template)
.scaledToFit()
.frame(width: 25, height: 25)
DatePicker(
"Birth date",
selection: $birthdate,
in: ...Date(),
displayedComponents: .date
)
.accentColor(.black)
} //: HSTACK
.padding(.horizontal)
.frame(height: 60)
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
Spacer()
// MARK: - SAVE BUTTON
Button {
if name != "" {
savePerson()
presentationMode.wrappedValue.dismiss()
}
} label: {
Text("Save")
.font(.body.bold())
.frame(maxWidth: .infinity)
.frame(height: 60)
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
} //: BUTTON
}
.navigationTitle("Add Person")
.padding()
}
}
private func savePerson() {
let newPerson = Person(context: viewContext)
do {
newPerson.name = name
newPerson.birthdate = birthdate
newPerson.dateCreated = Date()
try viewContext.save()
} catch {
print(error.localizedDescription)
}
}
}
struct AddPersonView_Previews: PreviewProvider {
static var previews: some View {
let container = CoreDataManager.shared.container
AddPersonView()
.environment(\.managedObjectContext, container.viewContext)
}
}
My PersonalPageView:
import SwiftUI
struct PersonalPageView: View {
#Environment(\.managedObjectContext) private var viewContext
var person: Person
var name: String
var age: String
var body: some View {
VStack(spacing: 20) {
HStack {
Text(name).font(.largeTitle.bold())
Spacer()
Text(age + " years old").font(.title2.bold()).foregroundColor(.secondary)
}
RoundedRectangle(cornerRadius: 10)
.fill(.ultraThinMaterial)
.frame(height: 300)
VStack {
ForEach(person.answers) { answer in // <- This ForEach doesn't work for now
Text("\(answer)")
}
}
Spacer()
NavigationLink {
QuestinarriePageView(person: person, name: "Jack")
} label: {
Text("Start Questinarrie")
.font(.title2.bold())
.frame(maxWidth: .infinity)
.frame(height: 60)
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
}
}
.navigationBarTitleDisplayMode(.inline)
.padding()
}
}
struct PersonalPageView_Previews: PreviewProvider {
static var previews: some View {
PersonalPageView(person: Person(), name: "Igor", age: "28")
}
}
And finally QuestinarriePageView:
import SwiftUI
struct QuestinarriePageView: View {
#Environment(\.managedObjectContext) private var viewContext
#State private var answers: [[String:Int]] = [[:]]
var person: Person
var name: String
var body: some View {
VStack(spacing: 40) {
HStack {
Spacer()
Button {} label: {
Text("Quit").font(.title2)
}
.tint(.black)
}
VStack {
Text("Does \(name) like to play with other kids?")
HStack(spacing: 100) {
Button {
answers += [["1":1]]
} label: {
Text("Yes")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
Button {
answers += [["1":0]]
} label: {
Text("No")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
}
}
VStack {
Text("Does \(name) like to speak?")
HStack(spacing: 100) {
Button {
answers += [["2":1]]
} label: {
Text("Yes")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
Button {
answers += [["2":0]]
} label: {
Text("No")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
}
}
VStack {
Text("Does \(name) like to play dance?")
HStack(spacing: 100) {
Button {
answers += [["3":1]]
} label: {
Text("Yes")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
Button {
answers += [["3":0]]
} label: {
Text("No")
.foregroundColor(.black)
.padding()
.background(
RoundedRectangle(cornerRadius: 10)
.fill(.secondary)
)
}
}
}
Spacer()
Button {
saveAnswers()
} label: {
Text("End Questionnaire")
.font(.body.bold())
.frame(maxWidth: .infinity)
.frame(height: 60)
.background(
RoundedRectangle(cornerRadius: 15, style: .continuous)
.fill(Color(UIColor.secondarySystemBackground))
)
}
}
.toolbar(.hidden)
.padding()
}
private func saveAnswers() {
let thisPerson = person
do {
thisPerson.answers = answers as? Data
try viewContext.save()
} catch {
print(error.localizedDescription)
}
}
}
struct QuestinarriePageView_Previews: PreviewProvider {
static var previews: some View {
QuestinarriePageView(person: Person(), name: "Igor")
}
}
Also I have a file with some helpers:
import SwiftUI
import CoreData
func calculateAge(fromDate: Date) -> Int {
let now = Date()
let calendar = Calendar.current
let ageComponents = calendar.dateComponents([.year], from: fromDate, to: now)
let age = ageComponents.year!
return age
}
extension Person {
static var ownFetchRequest: NSFetchRequest<Person> {
let request: NSFetchRequest<Person> = Person.fetchRequest()
request.sortDescriptors = [NSSortDescriptor(key: "dateCreated", ascending: false)]
return request
}
}
I've been struggling with this problem for a month now. I hope this is solvable🙏