SwiftUI list showing an array is not updated - ios

Question

In my app in SwiftUI, there is a list showing all items in an array. When I click on one item, its details are shown and can be modified. Those changes are stored in the array, but when I go back to the list view, the changes are only reflected after I made a change to that list array, like adding or moving an item. Can I make this list refresh when it re-appears?
My main view looks like this:
import SwiftUI
struct ContentView: View {
#State var items: [Item]
var body: some View {
NavigationView {
List {
ForEach(items) { item in
NavigationLink(destination: ItemDetailView(items: self.$items, index: self.items.firstIndex(of: item)!)) {
HStack {
VStack(alignment: .leading) {
Text(item.name).font(.title)
if item.serialNumber != nil {
Text(item.serialNumber!)
.font(.subheadline)
.foregroundColor(.secondary)
}
}
Spacer()
Text("\(item.valueInDollars)$").font(.title)
}
}
}
.onDelete(perform: delete)
.onMove(perform: move)
Text("No more items!")
}
.navigationBarTitle(Text("Homepwner"), displayMode: .inline)
.navigationBarItems(leading: EditButton(), trailing: Button(action: addItem) { Text("Add") })
}
}
//... functions
}
The detail view looks like this:
import SwiftUI
struct ItemDetailView: View {
#Binding var items: [Item]
let index: Int
var body: some View {
VStack {
VStack(alignment: .leading) {
HStack {
Text("Name: ")
TextField("Item Name", text: $items[index].name)
}
//... more TextFields
}
.padding(.all, 8.0)
VStack(alignment: .center) {
//... button
Image(systemName: "photo")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
}
}.navigationBarTitle(items[index].name)
}
}
The class Item is Identifiable and Equatable and only holds the necessary members, the class ItemStore only holds an array of Items.

Answer 1

i just tried this (had to enhance code so it was compilable at all) and it works:
import SwiftUI
struct Item : Equatable, Identifiable, Hashable {
var id = UUID()
var name: String
var serialNumber : String?
var valueInDollars : Int = 5
}
struct ContentView: View {
#State var items: [Item] = [Item(name: "hi"), Item(name: "ho")]
var body: some View {
NavigationView {
List {
ForEach(items, id: \.self) { item in
NavigationLink(destination: ItemDetailView(items: self.$items, index: self.items.firstIndex(of: item)!)) {
HStack {
VStack(alignment: .leading) {
Text(item.name).font(.title)
if item.serialNumber != nil {
Text(item.serialNumber!)
.font(.subheadline)
.foregroundColor(.secondary)
}
}
Spacer()
Text("\(item.valueInDollars)$").font(.title)
}
}
}
// .onDelete(perform: delete)
// .onMove(perform: move)
Text("No more items!")
}
.navigationBarTitle(Text("Homepwner"), displayMode: .inline)
// .navigationBarItems(leading: EditButton(), trailing: Button(action: addItem) { Text("Add") })
}
}
//... functions
}
struct ItemDetailView: View {
#Binding var items: [Item]
let index: Int
var body: some View {
VStack {
VStack(alignment: .leading) {
HStack {
Text("Name: ")
TextField("Item Name", text: $items[index].name)
}
//... more TextFields
}
.padding(.all, 8.0)
VStack(alignment: .center) {
//... button
Image(systemName: "photo")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
}
}.navigationBarTitle(items[index].name)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}