SwiftUI: reading data from ObservableObject - swift

Question

I am new to SwiftUI and created a Todo model. I then have a class that represents the container so that I can have an array of Todos and methods on it later on. I made TodoContainer an ObservableObject and then observing it after instantiating it: #ObservedObject var items = TodoContainer().
I am iterating through the list and expecting anytime I click the button, shouldn't it appear in the list since it's creating a new Todo each time and allTodos should have the array of all Todos?
import SwiftUI
struct Todo: Identifiable {
var id = UUID()
var name: String;
var priority: Int;
}
class TodoContainer: ObservableObject {
#Published var allTodos = [Todo]();
}
struct ContentView: View {
#ObservedObject var items = TodoContainer()
var body: some View {
Button("Create New") {
Todo(name: "New one", priority: Int.random(in: 1..<100))
}
List(items.allTodos, id: \.id){item in
Text(item.name)
}
}
}

Answer 1

You need to add the created todo to the view model's allTodos. Xcode may have shown you an error about an unused expression previously.
import SwiftUI
struct Todo: Identifiable {
var id = UUID()
var name: String;
var priority: Int;
}
class TodoContainer: ObservableObject {
#Published var allTodos = [Todo]();
}
struct ContentView: View {
#ObservedObject var items = TodoContainer()
var body: some View {
Button("Create New") {
let todo = Todo(name: "New one", priority: Int.random(in: 1..<100))
items.allTodos.append(todo) // here
}
List(items.allTodos, id: \.id){item in
Text(item.name)
}
}
}