title: How to see Digital Signatures in PDF files using objective C
body: <p>I have a PDF viewer in my app. I am simply loading the PDF file into a UIWebView. But when the PDF contains digital signature, it is not displayed in WebView. All other content of the PDF is displayed. Only signature area is left blank. I checked with the Preview, and Safari in OSX  also, and the result is the same. </p>
  
  <p>Then I downloaded the Adobe Reader app for Mac, and tried to open the PDF. It displayed the signature correctly!!</p>
  
  <p>Can anybody tell me whether there is any mechanism in objective C, to display the signature of PDF files.</p>