How to use Save As for PDFs in Flutter

It’s not uncommon for customers to want a setup where a document is read-only but users can still edit it and then use the Save As functionality to save the modified document to a new location. Nutrient supports saving documents with the Save As functionality.

After displaying a document on Flutter using either PspdfkitWidget or Pspdfkit.present(), Save As can be implemented by following these steps:

Ensuring disableAutosave is set to true in the configuration.
Calling the processAnnotations API on either PspdfkitWidgetController or the Pspdfkit plugin when a custom Flutter Button widget is pressed.

PspdfkitWidget and PspdfkitWidgetController

The code for this on Dart looks something like this:

@override
Widget build(BuildContext context) {
    // ...
 return Scaffold(
        // ...
          body: Column(children: [
                    Expanded(
                      child: PspdfkitWidget(
                        document: documentPath,
                        configuration: configuration,
                        onCreated: onPlatformViewCreated),
                    SizedBox(
                        child: ElevatedButton(
                          onPressed: () async {
                            // Ensure that the path for the new document is a writable path.
                            // You can use a package like https://pub.dev/packages/filesystem_picker to allow users to select the directory and name of the file to save.
                            final newDocumentPath = await getExportPath(
                                'PDFs/Embedded/new_pdf_document.pdf');
                           
                            await pspdfkitWidgetController.processAnnotations(
                                'all', 'embed', newDocumentPath);

                            print(
                                'Document has been saved to $newDocumentPath');
                          },
                          child: const Text('Save Document As'))
                    ))]
                ));
// ...
}

// ...

// This method is part of the custom widget's class.
  Future<void> onPlatformViewCreated(controller) async {
    pspdfkitWidgetController = controller;
  }

Save As is currently only available on iOS. Support for Save As on Android is coming soon.