# fileExporter(isPresented:document:contentType:defaultFilename:onCompletion:onCancellation:) Presents a system dialog for allowing the user to export a `WritableDocument` to a file on disk. ``` nonisolated func fileExporter(isPresented: Binding, document: D?, contentType: UTType? = nil, defaultFilename: String? = nil, onCompletion: @escaping (Result) -> Void, onCancellation: (() -> Void)? = nil) -> some View where D : WritableDocument, D.Writer.Destination == URL ``` ## Parameters `isPresented` A binding to whether the dialog should be shown. `document` The in-memory document to export. `contentType` The content type to export to. If not provided, `WritableDocument.writableContentTypes` are used. `defaultFilename` If provided, the default name to use for the exported file, which the user will have an opportunity to edit prior to the export. `onCompletion` A callback that will be invoked when the operation has succeeded or failed. The `result` indicates whether the operation succeeded or failed. `onCancellation` A callback that will be invoked if the user cancels the operation. ## Discussion In order for the dialog to appear, `document` must be non-nil. When the operation is finished, `isPresented` will be set to `false` before `onCompletion` is called. If the user cancels the operation, `isPresented` will be set to `false` and `onCancellation` will be called. Below is an example of a simple implementation of `WritableDocument`. Instead of `String`, you can use `Data` or any other type as the snapshot. ``` @MainActor final class TextDocument: WritableDocument { static let writableContentTypes: [UTType] = [.utf8PlainText] var text: String = "" nonisolated func writer( configuration: sending WriteConfiguration ) -> sending FileWrapperDocumentWriter { FileWrapperDocumentWriter(configuration) { snapshot, _ in FileWrapper(regularFileWithContents: Data(snapshot.utf8)) } } func snapshot(contentType: UTType) async throws -> String { text } } struct ExportView: View { @State private var document = TextDocument() @State private var isExporting = false var body: some View { Button("Export…") { isExporting = true } .fileExporter( isPresented: $isExporting, document: document, defaultFilename: "Untitled" ) { _ in } } } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)