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<*>.

If I understood it correctly, Binding is just technically State but it doesn't update the view. If that is the case then why would I need Binding if I could just use State to do the same thing?

Answer 1

Both @State and @Binding are property wrappers.

@State

• It is used to update the value of a variable every time.
• We can also say it's a two way binding.
• If we change the property state then SwiftUI will automatically reload the body of the view.
• It is used for simple properties like strings, integers and booleans.

@Binding

• Using this, you can access the state property of another view.
• It will give you the read and write access for the variable.