fileImporter

fileImporter.swift

.fileImporter(
    isPresented: $isImporting,
    allowedContentTypes: [.plainText],
    allowsMultipleSelection: false
) { result in
    do {
        guard let selectedFile: URL = try result.get().first else { return }
        guard let message = String(data: try Data(contentsOf: selectedFile), encoding: .utf8) else { return }

        document.message = message
    } catch {
        // Handle failure.
    }
}