Refreshing a SwiftUI List - swiftui

Question

Ím trying to refresh this List whenever I click on a NavLink
NavigationView {
List(feed.items.indices, id:\.self) { i in
NavigationLink(destination: ListFeedItemDetail(idx: i).environmentObject(self.feed)) {
ListFeedItem(item: self.$feed.items[i])
}
}
}
The list is made out of an array inside an environment object.
The problem: It does only refresh when I switch to another tab or close the app
I had used a modal View before and it worked there. (I did it with .onAppear)
Any Ideas?
Example
Problem: When you tap on an item in the list and tap the toggle button the EnvironmentObject is changed but this changed is only reflected when I change the tab and change it back again
import SwiftUI
import Combine
struct TestView: View {
#State var showSheet: Bool = false
#EnvironmentObject var feed: TestObject
func addObjects() {
var strings = ["one","two","three","four","five","six"]
for s in strings {
var testItem = TestItem(text: s)
self.feed.items.append(testItem)
}
}
var body: some View {
TabView {
NavigationView {
List(feed.items.indices, id:\.self) { i in
NavigationLink(destination: detailView(feed: self._feed, i: i)) {
HStack {
Text(self.feed.items[i].text)
Text("(\(self.feed.items[i].read.description))")
}
}
}
}
.tabItem({ Text("Test") })
.tag(0)
Text("Blank")
.tabItem({ Text("Test") })
.tag(0)
}.onAppear {
self.addObjects()
}
}
}
struct detailView: View {
#EnvironmentObject var feed: TestObject
var i: Int
var body: some View {
VStack {
Text(feed.items[i].text)
Text(feed.items[i].read.description)
Button(action: { self.feed.items[self.i].isRead.toggle() }) {
Text("Toggle read")
}
}
}
}
final class TestItem: ObservableObject {
init(text: String) {
self.text = text
self.isRead = false
}
static func == (lhs: TestItem, rhs: TestItem) -> Bool {
lhs.text < rhs.text
}
var text: String
var isRead: Bool
let willChange = PassthroughSubject<TestItem, Never>()
var read: Bool {
set {
self.isRead = newValue
}
get {
self.isRead
}
}
}
class TestObject: ObservableObject {
var willChange = PassthroughSubject<TestObject, Never>()
#Published var items: [TestItem] = [] {
didSet {
willChange.send(self)
}
}
}

Answer 1

I had a similar problem, this is the hack I came up with.
In your "TestView" declare:
#State var needRefresh: Bool = false
Pass this to your "detailView" destination, such as:
NavigationLink(destination: detailView(feed: self._feed, i: i, needRefresh: self.$needRefresh)) {
HStack {
Text(self.feed.items[i].text)
Text("(\(self.feed.items[i].read.description))")
}.accentColor(self.needRefresh ? .white : .black)
}
Note ".accentColor(self.needRefresh ? .white : .black)" to force a refresh when "needRefresh"
is changed.
In your "detailView" destination add:
#Binding var needRefresh: Bool
Then in your "detailView" in your Button action, add:
self.needRefresh.toggle()