class Room: ObservableObject { ... }
Contact: ObservableObject {
var chatRoom: Room
}
class Account: ObservableObject {
var rooms: Room { … }
var contacts: [Contact] {
return rooms.map {
Contact(chatRoom: $0)
}
}
func listenForRoomEvents() {
// Called on instantiation of a Room, this fires self.objectWillChange on room updates and is working properly
}
}
struct RoomView: View {
@ObservedObject var room: Room
}
/ THIS IS WORKING /
struct ParentView: View {
@EnvironmentObject account: Account
var body: some View {
RoomsView(account.rooms)
.onAppear {
self.account.listenForRoomEvents()
}
}
}
struct RoomsView: View {
var rooms: [Room]
var body: some View {
ForEach(rooms) { room in
NavigationLink(destination: RoomView(room: room)) {
RoomListItemView(room: room)
}
}
}
}
/ THIS IS NOT WORKING /
struct ParentView: View {
@EnvironmentObject account: Account
var body: some View {
Child1(contacts: account.contacts)
.onAppear {
self.account.listenForRoomEvents()
}
}
}
struct Child1: View {
@State var selectedContact: Contact?
var contacts: [Contact]
var body: some View {
RoomView(selectedContact.chatRoom)
UserSelectorView(contacts: contacts, selectedUser: $selectedContact) // View allowing selection of a user
}
}
I outlined my setup above; basically, I am instantiating a RoomView object with a Room instance containing all the chat events and other details. Child1 holds a selected contact state variable which is bound to two of its own subviews, one of which allows for the user to select a different contact and such.
What does not make sense to me is that the RoomView renders just fine with all it's events, but in the second solution I have it does not update when new messages come in or when one should be displayed after sending, for instance. I am passing a reference to the same Room object to it, but cannot for the life of me get it to update properly like it does in the first solution.
When I select a new user and go back to the previous one, the messages are all updated as expected.
Here is what I have tried so far:
- Making Contact.chatRoom a Published variable, and then calling self.objectWillChange.send() whenever chatRoom does
