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I'm developing an application using SwiftUI and SwiftData. The app includes a pricing section, and I'd like it to have an initial default value for pricing. Additionally, when updating the app on the App Store, I also want to update the prices. However, I'd like users to have the option to create their own prices if they don't want to use the ones I suggest. I want to save these prices obtained from the user because I'll be using these values for some operations later on.
I'm wondering how to achieve this. Should I use SwiftData or UserDefaults for managing the data, or should I save the prices to a JSON file? If I opt for saving to a JSON file, would it be possible to update the JSON file when updating the app? Please feel free to ask any questions. Thank you in advance for your responses.
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Hello everyone, I hope you are well. I have a question about .environment. I have an observable viewModel which has some functions and publishing value. I'm observing this viewModel in only 2 views but I'm using viewModel functions in every view. Should I use it (.environment). if I should use it, should I use this environment macro (@Environment(ViewModel.Self) var vm) for only functions in view? Thank you so much.
I'm getting this error : Picker: the selection "3" is invalid and does not have an associated tag, this will give undefined results. Because new brand doesn't have 3 values and .onChange modifier is not working fast enough. Thanks for your help.
Picker("Marka", selection: $brandIndex) {
Text("Seçin").tag(0)
ForEach(cars.indices, id: \.self) {
Text(cars[$0].brand).tag($0 + 1)
}
}
.onChange(of: brandIndex) {
if modelIndex != 0 {
modelIndex = 0
}
}
Picker("Model", selection: $modelIndex) {
Text("Seçin").tag(0)
if brandIndex != 0 {
let _ = print(modelIndex) // I'm getting first 3 then 0. And I'm getting error.
ForEach(cars[brandIndex - 1].models.indices, id: \.self) {
Text(cars[brandIndex - 1].models[$0])
.tag($0 + 1)
}
}
}
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I'm getting error when I try to delete my kayit item. And the line causing the error is given below. When I removed this line everything is OK. I can delete my kayit item.
@Environment(\.modelContext) private var modelContext
@Environment(\.dismiss) private var dismiss
@Bindable var kayit: Kayit
@FocusState private var focusedField: Field?
var body: some View {
Form {
Section {
Text(kayit.ozellikleri)
Text(kayit.girisKaydi.baglanmaNedeni) // This line gives error
}
}
.navigationTitle("Edit Registery")
.toolbar {
ToolbarItem(placement: .topBarTrailing) {
Button {
modelContext.delete(kayit)
try? modelContext.save()
dismiss()
} label: {
Image(systemName: "trash")
.foregroundStyle(.red)
}
}
}
}
When I use giriskaydi in anywhere it gives error. When I remove I can delete my item.
This is my model:
import Foundation
import SwiftData
@Model
class Kayit {
var aktifKayit = true
var plaka: String
var marka: String
var model: String
var ozellikleri: String
var kategori: Kategori
var girisKaydi: GirisKaydi
var cikisKaydi: CikisKaydi
init(aktifKayit: Bool = true, plaka: String, marka: String, model: String, ozellikleri: String, kategori: Kategori, girisKaydi: GirisKaydi, cikisKaydi: CikisKaydi) {
self.aktifKayit = aktifKayit
self.plaka = plaka
self.marka = marka
self.model = model
self.ozellikleri = ozellikleri
self.kategori = kategori
self.girisKaydi = girisKaydi
self.cikisKaydi = cikisKaydi
}
}
@Model
class GirisKaydi {
var baglayanKurum: String
var baglanmaNedeni: String
var girisTarihi: Date
var personel: String
var cekiciUcreti: Double
init(baglayanKurum: String, baglanmaNedeni: String, girisTarihi: Date, personel: String, cekiciUcreti: Double) {
self.baglayanKurum = baglayanKurum
self.baglanmaNedeni = baglanmaNedeni
self.girisTarihi = girisTarihi
self.personel = personel
self.cekiciUcreti = cekiciUcreti
}
}
@Model
class CikisKaydi {
var teslimAd: String
var teslimSoyad: String
var adres: String
var telefon: String
var dayanak: String
var cikisTarihi: Date
var aciklama: String
init(teslimAd: String, teslimSoyad: String, adres: String, telefon: String, dayanak: String, cikisTarihi: Date, aciklama: String) {
self.teslimAd = teslimAd
self.teslimSoyad = teslimSoyad
self.adres = adres
self.telefon = telefon
self.dayanak = dayanak
self.cikisTarihi = cikisTarihi
self.aciklama = aciklama
}
}
And the error:
@Model
class Kayit {
var aktifKayit = true
var plaka: String
var marka: String
var model: String
var ozellikleri: String
var kategori: Kategori
var girisKaydi: GirisKaydi
{
@storageRestrictions(accesses: _$backingData, initializes: _girisKaydi)
init(initialValue) {
_$backingData.setValue(forKey: \.girisKaydi, to: initialValue)
_girisKaydi = _SwiftDataNoType()
}
get {
_$observationRegistrar.access(self, keyPath: \.girisKaydi)
return self.getValue(forKey: \.girisKaydi) // Thread 1: EXC_BREAKPOINT (code=1, subcode=0x1cb45f898)
}
set {
_$observationRegistrar.withMutation(of: self, keyPath: \.girisKaydi) {
self.setValue(forKey: \.girisKaydi, to: newValue)
}
}
}
var cikisKaydi: CikisKaydi
init(aktifKayit: Bool = true, plaka: String, marka: String, model: String, ozellikleri: String, kategori: Kategori, girisKaydi: GirisKaydi, cikisKaydi: CikisKaydi) {
self.aktifKayit = aktifKayit
self.plaka = plaka
self.marka = marka
self.model = model
self.ozellikleri = ozellikleri
self.kategori = kategori
self.girisKaydi = girisKaydi
self.cikisKaydi = cikisKaydi
}
And is says CoreData: warning: Warning: Dropping Transactions prior to 52 for Persistent History in console. Thank you so much.
FiratSirin.