SwiftUI Academy · Lesson

Designing a ViewModel

Build an @Observable view model for a screen.

A ViewModel Is Just a Class

A ViewModel is usually a class that holds the state and logic for one screen. Using a class lets several views share the same live instance.

class ProfileViewModel {
    var name: String = ""
}

Add the @Observable macro so SwiftUI tracks property changes and re-renders the view automatically when state updates.

@Observable
class ProfileViewModel {
    var name = ""
}