I’m using PDFPageOverlayViewProvider with pdfview. I want to control the visibility of the overlay view using a button. However, the view updates only when it disappears and reappears. I would like the changes to be reflected immediately. How can I achieve this?
struct PDFKitView: View {
let bookId: UUID
let bookTitle: String
@State private var currentPage = "1"
@State private var isSideTab = false
@State private var selectedNote: [SelectedNote] = []
var body: some View {
let pdfDocument = openPDF(at: bookId.uuidString)
ZStack(alignment: .trailing) {
HStack(spacing: 0) {
PDFKitRepresentableView(
bookId: bookId,
selectedNote: $selectedNote,
currentPage: $currentPage,
pdfDocument: pdfDocument
)
if isSideTab {
SideView()
.transition(.move(edge: .trailing))
.zIndex(1)
.frame(maxWidth: 260)
}
}
.padding(.top, 73)
}
.onAppear {
getAllNote(bookId: bookId)
}
.customNavigationBar(back: true) {
Text("\(currentPage)/\(pdfDocument.pageCount)")
.pretendard(.CaptionRegular)
.foregroundStyle(Color.Text.primary)
} TrailingView: {
Button(action: {
withAnimation {
isSideTab.toggle()
}
}) {
Image(systemName: SFSymbol.squareStack3dDownForwardFill.icon)
.sfPro(.IconMedium)
.foregroundStyle(Color.Text.primary)
}
}
}
@ViewBuilder
func SideView() -> some View {
VStack(spacing: 16) {
HStack(spacing: 4) {
Image(systemName: SFSymbol.squareStack3dDownForwardFill.icon)
.sfPro(.IconSmall)
.foregroundStyle(Color.Text.primary)
Text(Literals.sideTabTitle)
.pretendard(.P2Bold)
.foregroundStyle(Color.Text.primary)
Spacer()
}
.padding(16)
.background {
Color.Background.white
}
ScrollView {
ForEach($selectedNote, id: \.noteId) { note in
NoteCellView(note: note)
}
}
.background {
Color.Fill.white
}
}
.background {
Color.Background.blueGray
}
}
@ViewBuilder
func NoteCellView(note: Binding<SelectedNote>) -> some View {
HStack(alignment: .top, spacing: 16) {
Image(.writingNote)
.resizable()
.scaledToFit()
.frame(width: 42, height: 60)
VStack(alignment: .leading, spacing: 8) {
Text(note.wrappedValue.noteId == bookId.uuidString ? "345" : "123")
.foregroundStyle(Color.Text.secondary)
.padding(.horizontal, 8)
.background {
Rectangle()
.strokeBorder(Color.Layout.secondary)
}
Text(bookTitle)
.lineLimit(2)
Toggle("", isOn: note.selected)
.labelsHidden()
.tint(Color.Fill.activePrimary)
}
}
.padding(EdgeInsets(top: 20, leading: 16, bottom: 16, trailing: 16))
}
}
struct PDFKitRepresentableView: UIViewRepresentable {
let bookId: UUID
@Binding var selectedNote: [SelectedNote]
@Binding var currentPage: String
let pdfDocument: PDFDocument
let pdfView = PDFView()
let toolPicker = PKToolPicker()
func makeUIView(context: Context) -> PDFView {
pdfView.displayMode = .singlePageContinuous
pdfView.usePageViewController(false)
pdfView.displayDirection = .vertical
pdfView.pageOverlayViewProvider = context.coordinator
pdfView.autoScales = true
pdfDocument.delegate = context.coordinator
pdfView.document = pdfDocument
return pdfView
}
func updateUIView(_ uiView: PDFView, context: Context) {
if
let localNote = selectedNote.first(where: {$0.noteId == bookId.uuidString}),
!localNote.selected
{
toolPicker.setVisible(false, forFirstResponder: uiView)
} else {
toolPicker.setVisible(true, forFirstResponder: uiView)
}
uiView.becomeFirstResponder()
}
func makeCoordinator() -> CanvasProvider {
return CanvasProvider(parent: self)
}
}
final class CanvasProvider: NSObject, PDFPageOverlayViewProvider, PDFDocumentDelegate {
var localNotes = [PDFPage: PKCanvasView]()
var passNotes = [PDFPage: Image]()
let parent: PDFKitRepresentableView
init(parent: PDFKitRepresentableView) {
self.parent = parent
super.init()
getDrawingDatas(
bookId: parent.bookId.uuidString,
selectedNote: parent.selectedNote,
document: parent.pdfDocument
)
}
func pdfView(_ view: PDFView, overlayViewFor page: PDFPage) -> UIView? {
var coverView: PKCanvasView? = PKCanvasView()
if
let view = localNotes[page],
parent.selectedNote.first(where: { $0.noteId == parent.bookId.uuidString })?.selected ?? false
{
view.backgroundColor = .clear
view.isOpaque = true
view.drawingPolicy = .anyInput
view.delegate = self
parent.toolPicker.addObserver(view)
coverView = view
(page as? CanvasPDFPage)?.canvasView = view
} else {
coverView = nil
}
for subView in view.documentView?.subviews ?? [] {
if subView.theClassName == "PDFPageView" {
subView.isUserInteractionEnabled = true
}
}
return coverView
}
func pdfView(_ pdfView: PDFView, willDisplayOverlayView overlayView: UIView, for page: PDFPage) { }
func pdfView(_ pdfView: PDFView, willEndDisplayingOverlayView overlayView: UIView, for page: PDFPage) { }
}
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