ILPDFKit: An Objective-C repository from starcub

A simple, minimalist toolkit for filling out PDF forms, and extracting PDF data in iOS, that extends WKWebView and the CoreGraphics PDF C API.

![screenshot](http://imgur.com/oo5HLUg.png "Screenshot" =250x)

Installation

You may simply add all the source files in the ILPDFKit folder to your project. Using this method, you must use ARC and link against the UIKit and QuartzCore frameworks. Alternatively, you may use CocoaPods, with the pod, 'ILPDFKit' .

Quick Start

The quickest way to get started with ILPDFKit is to take a look at the included sample app. For example, to view a PDF form resource named 'test.pdf' you can do the following:

ILPDFDocument *document = [[ILPDFDocument alloc] initWithResource:@"test.pdf"];
// Manually set a form value
[document.forms setValue:@"Derek" forFormWithName:@"Contacts.FirstName"];
// Save via a static PDF.
NSData* flatPDF = [document savedStaticPDFData]

PDF Support

ILPDFKit currently supports a narrow range of PDF versions and is not suitable for a production app that needs to save general PDF files from versions 1.3 to 1.7

PDF features that cause issues with saving include:

Linearized PDF files (Linearization is broken after save. File will open correctly using WKWebView, Preview, and Chrome but Adobe reader fails)
Object Streams (This library can not currently save fields stored in object streams, introduced in PDF 1.5 , files that use object streams are sometimes refered to as compressed files as object streams can compress PDF objects in the file).

Features

For this version, all features are considered experimental. Expanded features and documentation will be released in subsequent versions.

View and interact with PDF forms (Button, Text, and Choice)
Extract and modify AcroForm values.
Save form data to the original PDF file (See limitations above)
Created XML respresentation of all forms and data for form submission.
Easy introspection using PDFDocument, PDFPage, PDFDictionary and PDFArray.
Rapidly, parse, extract and analyze PDF document structure, data and properties.

Usage

Analyzing PDF Structure

for (ILPDFDictionary *field in self.document.catalog[@"AcroForm"][@"Fields"]) {
      // Inspect field properties here
}

Filling Out Forms

self.pdfViewController = [[ILPDFViewController alloc] initWithResource:@"test.pdf"];
[self.window setRootViewController:self.pdfViewController];
// Have fun filling out the form.

Getting/Setting Form Values Explicity

for (ILPDFForm *form in self.pdfViewController.document.forms){
	// Get
	NSString *formValue = form.value;
	NSString *formName = form.name; // Fully qualified field name.
	// Set
	form.value = @"foo";
	// If the form is visible on screen it will updated automatically.
}

Sending Form XML Data

NSString *documentFormsXML = [self.pdfViewController.document formsXML];
// Push to webservice

Contact

Derek Blair @derekblr

License

(The MIT License)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

starcub/ILPDFKit