Know the download progress for update an UIprogressView?

What you are doing is sending a "synchronous" request, meaning that the thread that is downloading the HTTP response will hang until all data has been fetched. It is never good to do this on a UI thread, even when you do not want display any indicator of the download's progress. I suggest using the NSURLConnection class, setting it's delegate, and responding to delegate methods.

A small tutorial for this can be found at http://snippets.aktagon.com/snippets/350-How-to-make-asynchronous-HTTP-requests-with-NSURLConnection .

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