doido.swift

import Foundation
import SwiftUI
import Combine

class Person: Identifiable{
    var id: Int
    var name: String

    init(id: Int, name: String){
        self.id = id
        self.name = name
    }

    func mudar(nome: inout String) {
        nome = "ois"
    }
}

class People: ObservableObject{
    @Published var people: [Person]

    init(){
        self.people = [
            Person(id: 1, name:"Javier"),
            Person(id: 2, name:"Juan"),
            Person(id: 3, name:"Pedro"),
            Person(id: 4, name:"Luis")]
    }

}

struct ContentView: View {
    @ObservedObject var mypeople: People = People()

    var body: some View {
        VStack(alignment: .center){
            ForEach(mypeople.people){ person in
                Text("\(person.name)")
            }
            Button(action: {
                self.dale(dole: &self.mypeople.people[0], newName: "diz")
            }) {
                Text("Add/Change name")
            }
        }
    }
    
    func dale(dole: inout Person, newName: String) {
        dole.name = newName
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}