Missing argument for parameter 'message' in call - swift

Question

I'm back with another question. I was following this guide: https://medium.com/#fs.dolphin/passing-data-between-views-in-swiftui-793817bba7b1
Everything worked from it, but the SecondView_Previews is throwing an error Missing argument for parameter 'message' in call. Here is my ContentView and SecondView
// ContentView
import SwiftUI
struct ContentView: View {
#State private var showSecondView = false
#State var message = "Hello from ContentView"
var body: some View {
VStack {
Button(action: {
self.showSecondView.toggle()
}){
Text("Go to Second View")
}.sheet(isPresented: $showSecondView){
SecondView(message: self.message)
}
Button(action: {
self.message = "hi"
}) {
Text("click me")
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
import SwiftUI
struct SecondView: View {
#State var message: String
var body: some View {
Text("\(message)")
}
}
struct SecondView_Previews: PreviewProvider {
static var previews: some View {
SecondView() // Error here: Missing argument for parameter 'message' in call.
}
}
It tried changing it to SecondView(message: String) and the error changes to "Cannot convert value of type 'String.Type' to expected argument type 'String'"
Can someone please explain what I'm doing wrong, or how to correctly set up the preview. It all works fine when there's no preview. Thanks in advance!

Answer 1

struct ContentView: View {
#State var message: String //Define type here
var body: some View {
Text("\(message)")
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView(message: "Some text") //Passing value here
}
}