I have the problem that when I want to edit the item, the item that was created last is always changed.
// EditSheet.swift
// CoreData_T
//
// Created by Janik Hartmann on 11.01.23.
//
import SwiftUI
import Foundation
import CoreData
struct EditSheet: View {
@Environment(\.managedObjectContext) private var viewContext
@Environment(\.dismiss) private var dismiss
@State private var name: String = ""
private var item: Item
var itemid: UUID
init(itemId: UUID, item: Item) {
self.item = item
self.itemid = item.id!
self.name = item.name ?? ""
}
var body: some View {
VStack{
TextField("Text eingeben", text: $name)
.padding()
Button {
update(item: item, itemid: item.id!)
dismiss()
} label: {
Text("Save")
}.padding()
}.onAppear{
name = item.name!
}
}
func update(item:Item, itemid id: UUID){
let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "Item")
fetchRequest.predicate = NSPredicate(format: "id = %@", itemid as CVarArg)
do {
let results = try viewContext.fetch(fetchRequest) // Rufe den Fetchrequest auf
let objectToUpdate = results[0] // Nehme das erste
objectToUpdate.setValue(name, forKey: "name") //Editiere den Key "name" zum übergebenen Wert
do {
try viewContext.save() // Speichern
print("Erfolgreich gespeichert!")
} catch let error as NSError {
print("Fehler beim Speichern. \(error), \(error.userInfo)")
}
} catch let error as NSError {
print("Fehler beim Fetchen. \(error), \(error.userInfo)")
}
}
}
A possible reason is that by invoking the state var showeditsheet,
HStack {
Text(item.name + "\(showeditsheet ? "" : "") "?? "Not found")
it forces some reevaluation of views (such as the sheet to present or even the whole List view).
.sheet(isPresented: $showeditsheet){
EditSheet(itemId: item.id!, item:item)
So, don't forget to close this long thread on this answer. And good continuation.
