I know Mozilla PDF.js is used only for PDF viewer purpose. By using some open source codes like (annotations) I have created some highlight, underline and strikeout features over PDF viewer.
Now I want to implement the free text and callout features to be added on top of it. Also while performing an annotation I want to retrieve the co-ordinates of PDF where the annotation is added.
Any help would be appreciated.
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I'm using WKWebView to load PDF files. I've found that all the annotations in the pdf are invisible.
Does anyone know how to fix this bug?
If you open the PDFs in Adobe Acrobat do the annotations display?
In a PDF 1.7 and earlier file, annotations are not required to have their appearance defined in the file and instead PDF viewing applications can generate them when the PDF is opened. Not all PDF viewing applications are capable of generating the appearance of all annotation types though (there are many different annotation types in PDF).
If Acrobat displays the annotations and WKWebview does not, then the annotations are most likely missing their appearances and Acrobat is generating them from what is stored in the PDF.
In PDF 2.0 (recently published as a standard), annotations are required to have a defined normal appearance so that PDF viewers do not have to generate the appearance any longer which will provide a much more consistent experience for those who are reading PDFs (it will be a while before this catches on though).
There are a number of tools out there that can be used to create the appearance for annotations and save them into the PDF so if you determine that the annotations are missing their appearances you can get one of those tools and run the PDFs through it before presenting them in your WKWebview.
I am developing the app like ibooks by reference,in that the pdf is not enabling the menu i.e while I long tap the pdf it not showing Menu like copy , define.
How can I work in menu? Help me.
The linked solution simply does not implement text selection or glyph coordinate extraction/conversion. You need to parse the PDF page content stream and track glyphs on the page. CGPDFOperatorTable can be a starting point, however I suggest reading the PDF spec and getting familiar with the multiple transformation matrix states that a page can have - it's quite tricky to get right. You also need to embed various CMaps (character maps) so that all fonts can be correctly parsed. It took me more than a year to get a reliable text extraction for >99% of all PDF documents. If you want to save this time, you can check out the commercial PDF SDK I am working - google for PSPDFKit. We support iOS and Android.
How to play with the PDF document in ios?
I have to perform some operations on the PDF document like - read the PDF document, Adding annotations to PDF, making note on PDF, Search text in PDF, highlighting the text in PDF document.
How this can be achieved? Can anyone please suggest me a sdk or tutorial? (Except PDFKitten...)
I know it is old question but since iOS11 you can use PDFKit.
I am using pdf reader sample for display pdf and book marking.
But i need some extra features i.e highlight certain text in pdf and want to make it saved.
using ios sdk.
Is there any way to do it?
Does iOS provide any control upon the attributes of the text present on a PDF,i.e can we change the background color of the text present on the pdf, say for when a audio sync is in progress? I guess CGPDF does not provide much to control or rather extract the content information of a PDF page. Any other library that can help? Thanks !