Hello Jack,
thanks for the feedback. The data model looks like this:
I have the folder Data. In this folder are two subfolders: Clothing and Technology. In the Clothes folder there are many individual text files containing T-shirt, pants, socks, cap, etc.. . In technology with the content camera, notebook, battery, etc.... . I have trained it so that if I enter camera with technology is output, or if I enter pants me clothing is output.
But I would like to have it so that if I have a category in the app with the name clothing me the different clothes should be output. Because the app should work in such a way that you can create equipment lists and you are given suggestions for the content for each category to help you. As support. When I bag clothes, for example, socks should be suggested to me, or pants.
Janik
ja_hartmann
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I pasted this line of code from you and instead of "T" : "F" I left the string empty with "" : "". And now it works. I don't know exactly why, but it works. Thank you very much for your help. You have helped me a lot!
I have tested a few things again. And according to the print statements the problem is that the EditSheet gets the wrong id passed and inside the EditSheet everything fits with the ID.
item ID for Edit: 2E5B0F87-362B-4E77-8AC0-95EF1ED18AC0
id during the press of the save button at the edit view: 66C8A3FD-0980-44BD-AE7D-8411D7A07A9C
id to update: 66C8A3FD-0980-44BD-AE7D-8411D7A07A9C
<Item: 0x600001eb87d0> (entity: Item; id: 0x9b04be453a90c036 x-coredata://8BCB76FB-F8F2-43CE-B703-1E6C1BB03811/Item/p11; data: {
id = "66C8A3FD-0980-44BD-AE7D-8411D7A07A9C";
liste = (
);
name = D;
timestamp = nil;
})
I pick Codegen: Class Definition for Item.
I have no struct for item. Thought if I create it in the database and add attributes that it would be sufficiently defined with that. I pick Codegen: Class Definition
This is what I got:
Sorry.
import SwiftUI
import CoreData
import Foundation
struct ContentView: View {
@Environment(\.managedObjectContext) private var viewContext
@FetchRequest(sortDescriptors: [NSSortDescriptor(keyPath: \Item.name, ascending: false)],
animation: .default)
var items: FetchedResults<Item>
@State private var name: String = ""
@State private var showeditsheet = false
var body: some View {
NavigationView {
VStack{
TextField("Text eingeben", text: $name)
.padding()
Button {
addItem()
} label: {
Text("Save")
}.padding()
List {
ForEach(items, id: \.self) { item in
NavigationLink(destination: ToDo(list:item)) {
HStack {
Text(item.name ?? "Not found")
Button {
print(item.id)
self.showeditsheet = true
} label: {
Text("Edit")
}.buttonStyle(.bordered)
}
}
.sheet(isPresented: $showeditsheet){
EditSheet(itemId: item.id!, item:item)
}
}
.onDelete(perform: deleteItems)
}
}
}
}
//MARK: - Hinzufügen der Listen
private func addItem() {
withAnimation {
let newItem = Item(context: viewContext)
newItem.name = name
newItem.id = UUID()
do {
try viewContext.save()
} catch {
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
private func deleteItems(offsets: IndexSet) {
withAnimation {
offsets.map { items[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
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 {
print(item.id)
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 == %@", id as CVarArg)
do {
let results = try viewContext.fetch(fetchRequest)
if results.count > 0 {
let objectToUpdate = results[0]
if objectToUpdate.value(forKey: "id") as? UUID == id {
objectToUpdate.setValue(name, forKey: "name")
do {
print (id)
print(objectToUpdate)
try viewContext.save()
print("Erfolgreich gespeichert!")
} catch let error as NSError {
print("Fehler beim Speichern. \(error), \(error.userInfo)")
}
} else {
print("Fehler")
}
} else {
print("Fehler")
}
} catch let error as NSError {
print("Fehler beim Fetchen. \(error), \(error.userInfo)")
}
}
}
editname is from an earlier version. Here it is without meaning.
Id when I press the Edit button on the ContenView: 78AB2468-CA12-4A3B-8C55-67F366FDFE7D
Id when I press the Save button on the EditView: BCC1267C-ACF6-4926-9BE8-5C4D8062E108
Id the update func print: BCC1267C-ACF6-4926-9BE8-5C4D8062E108
objecttoupdate:
<Item: 0x600001196bc0> (entity: Item; id: 0x81a3114acc5b93d0 x-coredata://8BCB76FB-F8F2-43CE-B703-1E6C1BB03811/Item/p3;
data: {
id = "BCC1267C-ACF6-4926-9BE8-5C4D8062E108";
liste =( );
name = Asdfasdf;
timestamp = nil;
})
I therefore believe that the update func also works. But the func does not get the ID of the selected object. The first print ID in the ContentView always changes depending on the object. The other IDs are always the same, as if it always selects the same object only. Or does not get the correct ID transmitted.
Ok
import SwiftUI
import CoreData
import Foundation
struct ContentView: View {
@Environment(\.managedObjectContext) private var viewContext
//Abfrage zum Anzeigen
@FetchRequest(sortDescriptors: [NSSortDescriptor(keyPath: \Item.name, ascending: false)],
animation: .default)
//Referenz zum Entity Item
var items: FetchedResults<Item>
@State private var name: String = ""
// Test
@State private var editName = ""
@State private var showeditsheet = false
var body: some View {
NavigationView {
VStack{
TextField("Text eingeben", text: $name)
.padding()
Button {
addItem()
} label: {
Text("Save")
}.padding()
List {
ForEach(items, id: \.self) { item in
NavigationLink(destination: ToDo(list:item)) {
HStack {
Text(item.name ?? "Not found")
Button {
self.showeditsheet = true
} label: {
Text("Edit")
}.buttonStyle(.bordered)
}
}
.sheet(isPresented: $showeditsheet){
EditSheet(itemId: item.id!, item:item)
}
}
.onDelete(perform: deleteItems)
}
}
}
}
//MARK: - Hinzufügen der Listen
private func addItem() {
withAnimation {
let newItem = Item(context: viewContext)
newItem.name = name
newItem.id = UUID()
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
private func deleteItems(offsets: IndexSet) {
withAnimation {
offsets.map { items[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
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 == %@", id as CVarArg)
do {
let results = try viewContext.fetch(fetchRequest) // Rufe den Fetchrequest auf
if results.count > 0 {
let objectToUpdate = results[0] // Nehme das erste
if objectToUpdate.value(forKey: "id") as? UUID == id {
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)")
}
} else {
print("Fehler: das aktualisierte Element hat eine andere ID als die übergebene.")
}
} else {
print("Fehler: keine Ergebnisse für die angegebene ID gefunden.")
}
} catch let error as NSError {
print("Fehler beim Fetchen. \(error), \(error.userInfo)")
}
}
}
The ContentView, where the item is set:
//
// ContentView.swift
// CoreData_T
//
// Created by Janik Hartmann on 31.12.22.
//
import SwiftUI
import CoreData
import Foundation
struct ContentView: View {
@Environment(\.managedObjectContext) private var viewContext
//Abfrage zum Anzeigen
@FetchRequest(sortDescriptors: [NSSortDescriptor(keyPath: \Item.name, ascending: false)],
animation: .default)
//Referenz zum Entity Item
var items: FetchedResults<Item>
@State private var name: String = ""
// Test
@State private var editName = ""
@State private var showeditsheet = false
var body: some View {
NavigationView {
VStack{
TextField("Text eingeben", text: $name)
.padding()
Button {
addItem()
} label: {
Text("Save")
}.padding()
List {
ForEach(items, id: \.self) { item in
NavigationLink(destination: ToDo(list:item)) {
HStack {
Text(item.name ?? "Not found")
Button {
self.showeditsheet = true
} label: {
Text("Edit")
}.buttonStyle(.bordered)
}
}
.sheet(isPresented: $showeditsheet){
EditSheet(itemId: item.id!, item:item)
}
}
.onDelete(perform: deleteItems)
}
}
}
}
//MARK: - Hinzufügen der Listen
private func addItem() {
withAnimation {
let newItem = Item(context: viewContext)
newItem.name = name
newItem.id = UUID()
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
private func deleteItems(offsets: IndexSet) {
withAnimation {
offsets.map { items[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
Changed the code again and tried other approaches. Have asked the question again because of this. I load the items from the Item entity. The items are added in the ContentView. Tested with a print-statement that there the Ids are created correctly and also each item has a different one. Only in the EditView it always takes the same ID of the last added item. Also was first the problem that the Ids are randomly selected. Now it always selects the one of the last added item.
Changed the code again and tried other approaches. Have asked the question again because of this. I load the items from the Item entity. The items are added in the ContentView. Tested with a print-statement that there the Ids are created correctly and also each item has a different one. Only in the EditView it always takes the same ID of the last added item. Also was first the problem that the Ids are randomly selected. Now it always selects the one of the last added item.
Do you mean alerts that occur in your app, or messenges from other apps like iMessage. Because the system notifications or from other apps always come on the top right.
Thank you very much! Thanks to your tips and projects, it works for me now. You have helped me a lot and to this extent is not self-evident!
That worked. I can't thank you enough!
Yes, it is then simply all white