Why an ObservedObject array is not updated in my SwiftUI application?

Question

I\'m playing with SwitUI, trying to understand how ObservableObject works. I have an array of Person objects. When I add a new Person into the array, it is reloaded in my Vi

Answer 1

I think there is a more elegant solution to this problem. Instead of trying to propagate the objectWillChange message up the model hierarchy, you can create a custom view for the list rows so each item is an @ObservedObject:

struct PersonRow: View {
    @ObservedObject var person: Person

    var body: some View {
        Text(person.name)
    }
}

struct ContentView: View {
    @ObservedObject var mypeople: People

    var body: some View {
        VStack{
            ForEach(mypeople.people){ person in
                PersonRow(person: person)
            }
            Button(action: {
                self.mypeople.people[0].name="Jaime"
                //self.mypeople.people.append(Person(id: 5, name: "John"))
            }) {
                Text("Add/Change name")
            }
        }
    }
}

In general, creating a custom view for the items in a List/ForEach allows each item in the collection to be monitored for changes.