@state vs @stateobject

In SwiftUI, @State and @StateObject are both used to manage state in your views, but they serve different purposes:

@State is used for simple state management within a single view. It is a lightweight way to store a value that can change over time and is used to trigger view updates. SwiftUI manages the storage and provides it back for the view to read and write. It is ideal for simple, local state that doesn't need to be shared with other views.
@StateObject, on the other hand, is used for managing more complex state that is shared across multiple views. It is specifically designed to work with reference types that conform to the ObservableObject protocol. When you use @StateObject, SwiftUI takes ownership of the object and ensures it is created only once during the lifecycle of the view. This is useful for managing state that needs to be observed by multiple views or when the state is more complex and involves business logic.

For more detailed information on state management in SwiftUI, you might want to check out the session SwiftUI essentials (10:41) which covers the fundamentals of views and state management.