Why doesn't the Text update when using #Binding? - swift

Question

The Working works as expected.
But using the #Binding in the NotWorking example, doesn't seem to update the Text control. Why doesn't the #Binding version work, what am I missing here?
Initial Launch:
After Typing:
struct Working: View {
//Binding from #State updates both controls
#State private var text = "working"
var body: some View {
VStack {
TextField("syncs to label...", text: $text)
Text($text.wrappedValue)
}
}
}
struct NotWorking: View {
//Using the #Binding only updates the TextField
#Binding var text: String
var body: some View {
//This does not works
VStack {
TextField("won't sync to label...", text: $text)
Text($text.wrappedValue)
}
}
}
struct Working_Previews: PreviewProvider {
#State static var text = "not working"
static var previews: some View {
VStack {
Working()
NotWorking(text: $text)
}
}
}

Answer 1

Static #States don't work. It's the fact that it being static means that the struct Working_Previews isn't mutated when text is changed, so it won't refresh.
We can test this by changing from a PreviewProvider to an actual View:
struct ContentView: View {
#State static var text = "not working"
var body: some View {
VStack {
Working()
NotWorking(text: ContentView.$text)
}
}
}
This code gives the following runtime message:
Accessing State's value outside of being installed on a View. This will result in a constant Binding of the initial value and will not update.

Answer 2

Thanks to #George_E. I define #State in a wrapper view and display that for the preview. The WrapperView simply displays the control that I want to preview but it contains the State.
struct Working_Previews: PreviewProvider {
//Define the State in a wrapper view
struct WrapperView: View {
#State var text = "Preview is now working!!!"
var body: some View {
NotWorking(text: $text)
}
}
static var previews: some View {
VStack {
Working()
//Don't display the view that needs the #Binding
//NotWorking(text: $text)
//Use the WrapperView that has #State and displays the view I want to preview.
WrapperView()
}
}
}