Put PDF into NSData
<p>How do I put my PDF into <code>NSData</code>?  I have the location of the PDF as a string in my Documents Directory of the app.  When I try to email it, I see the PDF in the body of the email (vs seeing an attachment icon.  I don't know if that's normal or not).  But when I receive the email on the other end, it does not have a PDF extension.  What am I doing wrong?  Thanks.</p>

<pre><code>NSString *documentsDirectory = [self GetURLForPDF]; // I know this name is bad since it is really a NSString
NSLog(@"DocumentsDirectory: %@", documentsDirectory);
NSString *pdfName = [NSString stringWithFormat:@"%@/%@.pdf", documentsDirectory, title];
NSLog(@"pdfName: %@", pdfName);
NSData *pdfData = [NSData dataWithContentsOfFile:pdfName];
[mailComposer addAttachmentData:pdfData mimeType:@"application/pdf" fileName:title];    
[self presentModalViewController:mailComposer animated:YES];
</code></pre>
