Missing argument for parameter in call, Binding value issue - swift

Question

I am trying to create a binding value in a view. Whenever I do this is gives a compiling error in the PreviewProvider. The error is shown in the last code bit.
I cant add the argument (showProfile: $showProfile) because it cannot find it in the scope.
struct ContentView: View {
#State var showMenu = false
#Binding var showProfile: Bool
var body: some View {
let drag = DragGesture()
.onEnded {
if $0.translation.width < -100 {
withAnimation {
self.showMenu = false
}
}
}
//MARK: View Start
return NavigationView {
GeometryReader { geo in
ZStack(alignment: .leading) {
MainView()
.frame(width: geo.size.width, height: geo.size.height)
.offset(x: self.showMenu ? geo.size.width/2 : 0)
.disabled(self.showMenu ? true : false)
if self.showMenu {
MenuView()
.frame(width: geo.size.width/2)
.transition(.move(edge: .leading))
}
}
.gesture(drag)
} .navigationBarItems(leading: (
Button(action: {
withAnimation {
self.showMenu.toggle()
}
}) {
Image(systemName: "line.horizontal.3")
.imageScale(.large)
}
)
)}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView() // <---- Error, missing argument for parameter 'showProfile' in call
}
}

Answer 1

Because you have defined a #Binding on ContentView, you need to always provide a value for it. In a preview, you'll most likely want to pass it a .constant value:
ContentView(showProfile: .constant(true))