How can I download additional extension not supported in mobile safari?
<p>Qrafter is iPhone application to read the QRCode.
(http://itunes.apple.com/us/app/qrafter-qr-code-reader-generator/id416098700?mt=8).</p>

<p>if Qrafter is installed in your iPhone and you click a Vcf extension file in mobile safari,
iPhone will launch the Qrafter and read the Vcf file!
(Vcf is not supported extension officially in mobile safari)</p>

<p><strong>How can I develop this function like this?</strong></p>
