SwiftUI @State vs Binding

Question

I am learning iOS Programming with Swift and SwiftUI. I know very little and I am very confuse about the difference between a @State and a Binding<*>

Answer 1

Think of State as the single source of truth for your view, as a means of mutating a variable & invalidating the view to reflect that state.

Binding on the other hand, is a two-way connection between a view and its underlying model. A means of mutating a State that is not managed by the view (for example a Toggle that reflects and controls a bool value that the control itself has no knowledge about its storage or origin)

Finally, you can get a Binding from any State by using the $ prefix operator.

A simple guide for choosing between them would be:

Do I need to modify a value that is private to me? => State

Do I need to modify a State of some other view? => Binding