How to handle data and data models in SwiftUI - arrays

Question

I am having trouble with the structure of my data for creating a List in SwiftUI. Before SwiftUI I created my data models and held this data in separated files. For example,
In my UserModel.swift :
import SwiftUI
struct UserModel: Equateable {
var name: String
var items = [ItemModel]()
init(name: String, items: [ItemModel]? = nil) {
self.name = name
if let items = items {
self.items = items
}
}
}
In my ItemModel.swift :
import SwiftUI
struct ItemModel: Equatable {
var itemName: String
var price: Double
init(itemName: String, price: Double) {
self.itemName = itemName
self.price = price
}
}
Then I had a separate class called Data that held this data.
In my Data.swift :
import Foundation
class Data {
static var userModels = [UserModel]()
static var itemModels = [ItemModel]()
}
I would update the data by doing something like this in my views:
let user = UserModel(name: "Bob")
Data.userModels.append(user)
I'm having trouble populating a List from this framework in SwiftUI. I tried to make both of my model classes conform to Identifiable but that doesn't seem to help in updating the list. This is what I'm doing so far:
Updated UserModel :
struct UserModel: Identifiable {
var id = UUID()
var name: String
var items = [ItemModel]()
init(id: UUID, name: String, items: [ItemModel]? = nil) {
self.id = id
self.name = name
if let items = items {
self.items = items
}
}
}
Updated ItemModel:
struct ItemModel: Identifiable {
var id = UUID()
var itemName: String
var price: Double
init(id: UUID, itemName: String, price: Double) {
self.id = id
self.itemName = itemName
self.price = price
}
}
And in my ContentView.swift
List (Data.userModels) { user in
Text("\(user.name)")
}
But this does not update the List when I am running the app. (Btw I take input from TextField, append it to Data.userModels, and try to populate it in the List with no luck.)
Is there a different way I should be structuring my data and data models? Or am I just not using the proper syntax when creating the list? Sorry for the long question. Thanks for the help!