Passing data between views in SwiftUI? - swiftui

Question

I'm trying to pass a few simple data (strings and URL and images) from one view to another view in my swiftui app.
This simple task proves to be a headache at the moment.
This is what I have done so far:
in my firstView I have this:
struct Book {
var title: String
var author: String
}
struct firstView: View {
#State private var showAudioPlayer = false
#Binding var tabSelection: Int
init(tabSelection: Binding<Int>) {
_tabSelection = tabSelection
}
var body: some View {
NavigationView {
ZStack {
Text("Tap Here")
.onTapGesture {
self.showAudioPlayer.toggle()
}
}
}
.fullScreenCover(isPresented: $showAudioPlayer, content: secondView.init)
}
}
And this is what I have in my secondView:
struct secondView: View {
#Environment(\.presentationMode) var presentationMode
var book: Book
var body: some View {
NavigationView {
ZStack{
VStack {
}
}
.background(Color.clear)
.navigationBarTitle("", displayMode: .inline)
.navigationBarItems(
leading: Button(action: {
presentationMode.wrappedValue.dismiss()
}) {
Image(systemName: "chevron.down.circle")
.foregroundColor(Color.black)
})
.frame(maxWidth: .infinity, maxHeight: .infinity)
.edgesIgnoringSafeArea(.all)
}
.edgesIgnoringSafeArea(.all)
}
}
However, when I try to compile my code, I get this error:
The error itself doesn't make much sense and I'm stuck.
what am I doing wrong?

Answer 1

Memberwise Initializers for Structure Types
The compiler takes a peak into the struct and sees two non-optional properties and thinks they should be in the constructor. It doesn't know the #Environment is going to magically be set by the framework, so it includes that property. As #Baglan said above, you are on the hook for the Book and need to pass it in.
The error message is saying "you asked me to instance audioPlayerView and I need a couple of parameters to make that happen", but you really only need one.