> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/ios/forms.md). # Forms - [iOS PDF form filling library](https://docs.apryse.com/ios/forms/forms.md): Learn how to import, export, and fill form data in PDFs with this comprehensive guide. Create new form fields, flatten forms, and more. Start now! The Apryse iOS SDK streamlines secure document proces - [Merge Form Data File (FDF or XFDF) to PDF Forms on iOS](https://docs.apryse.com/ios/forms/import-data.md): Learn how to efficiently manage XFDF and FDF files with the FDFUpdate, FDFMerge, and MergeXFDF APIs. Discover the best methods for replacing or adding annotations to PDF documents. The Apryse iOS SDK - [Extract FDF data from a PDF on iOS](https://docs.apryse.com/ios/forms/export-data.md): Learn how to extract data from PDF to FDF, export FDF as XFDF, and disable annotation auto-save. Get full support for FDF with sample code for form fill and data extraction. The Apryse iOS SDK streaml - [Create new form fields and widget annotations on iOS](https://docs.apryse.com/ios/forms/new-fields.md): Learn how to create new form fields and widget annotations in a PDF document. Get a full code sample illustrating PDFNet capabilities for interactive forms (AcroForms) and understand field types. Crea - [Filling PDF form fields on iOS](https://docs.apryse.com/ios/forms/fill-fields.md): We show how to fill PDF form fields on iOS. Guide includes sample code. - [Flatten PDF form content on iOS](https://docs.apryse.com/ios/forms/flatten.md): Flatten form fields in a PDF document with this comprehensive guide on PDF interactive forms and annotation flattening. Learn how to merge field appearances and flatten all forms in a single function - [APIs for PDF form filling on iOS](https://docs.apryse.com/ios/forms/apis.md): Discover utility classes for PDF form handling in iOS using Objective-C and Swift with PTFDFDoc and PTFDFField. Enhance your PDF document workflow now! The Apryse iOS SDK streamlines secure document p - [Code samples to fill PDF forms & extract data on iOS](https://docs.apryse.com/ios/forms/samples.md): Discover the power of PDF interactive forms (AcroForms) with PDFNet SDK. Explore form fill, data extraction, and UI samples in this showcase app. Try it now! The Apryse iOS SDK streamlines secure docu --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.apryse.com/ios/forms.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.