SwiftUI @Binding Initialize

Question

Been playing around with SwiftUI and understood the concept of BindableObjects etc so far (at least I hope I do).

I bumped into a stupid problem I can't seem to find an answer for: How do you initialize a @Binding variable?

I have the following code:

struct LoggedInView : View {      @Binding var dismissView: Bool      var body: some View {         VStack {             Text("Hello World")         }     } } 

In my preview code, I want to pass that parameter of type Binding<Bool>:

#if DEBUG struct LoggedInView_Previews : PreviewProvider {     static var previews: some View {         LoggedInView(dismissView: **Binding<Bool>**)     } } #endif 

How would I go an initialize it? tried:

Binding<Bool>.init(false) Binding<Bool>(false) 

Or even:

@Binding var dismissView: Bool = false 

But none worked... any ideas?

Answer 1

When you use your LoggedInView in your app you do need to provide some binding, such as an @State from a previous view or an @EnvironmentObject.

For the special case of the PreviewProvider where you just need a fixed value you can use .constant(false)

E.g.

#if DEBUG struct LoggedInView_Previews : PreviewProvider {     static var previews: some View {         LoggedInView(dismissView: .constant(false))     } } #endif