To answer my own question - yes, you can send PDFs to applications that support custom URL schemes using this:
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
URL scheme for GoodReader:
url=@ "ghttp://www.mysite.com/myfile.pdf";
iAnnotate PDF:
url=@ "pdfs://www.mysite.com/myfile.pdf";
Does anyone know a custom url scheme for iBooks?
user373789
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