How to extract bold text from pdf file programatically using pdfkit in iOS?

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PDF

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iOS

Swift

I am using PDFKit to display my pdf files. I've integrated the searching functionality but I want to search only bold texts/words.

I'm wondering is it possible to do what I'm looking for or does Apple don't allow it? Because String data type is from Foundation class and UIFont is from UIKit.

I can search text only on the basis of lowercase, uppercase or text color. I've googled a lot. And I found that pdf files are made up of vectors. So, sometimes its difficult to extract the font-family of the text.

If anyone knows any solution. Please help.

Thanks in advance!

What I have tried:

I've googled a lot. And I found that pdf files are made up of vectors. So, sometimes its difficult to extract the font-family of the text.