Using TextField hides the ScrollView beneath it in VStack - swift

Question

This view hold a list of pdf names which when tapped open webviews of pdf links.
The view has a search bar above the list which when tapped causes the scrollview to disappear.
struct AllPdfListView: View {
#Environment(\.presentationMode) var mode: Binding<PresentationMode>
#ObservedObject var pdfsFetcher = PDFsFetcher()
#State var searchString = ""
#State var backButtonHidden: Bool = false
#State private var width: CGFloat?
var body: some View {
GeometryReader { geo in
VStack(alignment: .leading, spacing: 1) {
HStack(alignment: .center) {
Image(systemName: "chevron.left")
Text("All PDFs")
.font(.largeTitle)
Spacer()
}
.padding(.leading)
.frame(width: geo.size.width, height: geo.size.height / 10, alignment: .leading)
.background(Color(uiColor: UIColor.systemGray4))
.onTapGesture {
self.mode.wrappedValue.dismiss()
}
HStack(alignment: .center) {
Image(systemName: "magnifyingglass")
.padding([.leading, .top, .bottom])
TextField ("Search All Documents", text: $searchString)
.textFieldStyle(PlainTextFieldStyle())
.autocapitalization(.none)
Image(systemName: "slider.horizontal.3")
.padding(.trailing)
}
.overlay(RoundedRectangle(cornerRadius: 10).stroke(.black, lineWidth: 1))
.padding([.leading, .top, .bottom])
.frame(width: geo.size.width / 1.05 )
ScrollView {
ForEach($searchString.wrappedValue == "" ? pdfsFetcher.pdfs :
pdfsFetcher.pdfs.filter({ pdf in
pdf.internalName.contains($searchString.wrappedValue.lowercased())
})
, id: \._id) { pdf in
if let parsedString = pdf.file?.split(separator: "-") {
let request = URLRequest(url: URL(string: "https://mylink/\(parsedString[1]).pdf")!)
NavigationLink(destination: WebView(request: request)
.navigationBarBackButtonHidden(backButtonHidden)
.navigationBarHidden(backButtonHidden)
.onTapGesture(perform: {
backButtonHidden.toggle()
})) {
HStack(alignment: .center) {
Image(systemName: "doc")
.padding()
.frame(width: width, alignment: .leading)
.lineLimit(1)
.alignmentGuide(.leading, computeValue: { dimension in
self.width = max(self.width ?? 0, dimension.width)
return dimension[.leading]
})
Text(pdf.internalName)
.padding()
.multilineTextAlignment(.leading)
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
}
.padding(.leading)
}
}
}
.navigationBarHidden(true)
}
.accentColor(Color.black)
.onAppear{
pdfsFetcher.pdfs == [] ? pdfsFetcher.fetchPDFs() : nil
}
}
}
}
}
Pdf list and Searchbar.
The same view on Searchbar focus.
I would like the search string to filter the list of pdfs while maintaining the visibility of the list.

Answer 1

I was able to fix this by making my #ObservableObject an #EnvironmentObject in my App :
#main
struct MyApp: App {
#ObservedObject var pdfsFetcher = PDFsFetcher()
var body: some Scene {
WindowGroup {
ContentView()
.environmentObject(pdfsFetcher)
}
}
}
struct AllPdfListView: View {
#EnvironmentObject var pdfsFetcher: PDFsFetcher
}