SwiftUI: reading data from ObservableObject-CodePudding

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)
        }
    }
}

CodePudding user response：

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)
        }
    }
}