iOS CGPdf highlight text using CGrect

问题

I am trying to highlight text using rect but the code below:

CGRect originalSize = CGPDFPageGetBoxRect(pagePDFRef, kCGPDFMediaBox);

return me rect less then I expected or maybe less then I see.

Is there any already made method that highlight text using scanner and CGRect

来源：https://stackoverflow.com/questions/23920377/ios-cgpdf-highlight-text-using-cgrect