How to modify attributes of class inside ForEach?

Does your code compile ?

• I do not see where you use your init.
• you have no ContentView defined
• also note that var names should start with lowerCase

You also need to have a state var that changes to force redraw.

I did this with the trick of update and use the always true if update || !update { }

There is certainly a cleaner way to do it, but this shows how to make it work.

class Person {
   
  var name = ""
  var points = 0
    
    init(name: String) {
        self.name = name
    }
}

struct ContentView: View {
    
    let greg = Person(name: "Greg")
    let jeo = Person(name: "Jeo")
    let humio = Person(name: "Humio")
    @State var update = false
    
    var nombres: [Person] {
        [greg, jeo, humio]
    }

    var body: some View {
        
        VStack {
            ForEach(nombres, id: \.name){ names in
                ZStack{
                    Rectangle()
                        .frame(width: 200, height: 200)
                    VStack{
                        if update || !update {  // A trick to have the View react to a change of state !
                            Text("\(names.points)")
                                .foregroundColor(Color.white)
                        }
                        
                        Button(action: {
                            names.points += 1
                            update.toggle()  // To change value of the state var
                        }, label: {
                            Text(names.name)
                        })
                        
                    }
                    
                }
                
            }
        }
        .padding()
    }
}