IPhone SDK - Sample code to download a file in a thread

I am looking for a starting point to implement a download manager. My requirements are simple.
I want to show a UIProgressView in a view controller and update it as i download file(s) from the internet. The view will have a cancel button, so the view cannot block on downloading the files. The cancel should cancel the download thread in such a way that the thread can cleanup if required.
To achieve this i guess i will have to download the file(s) in a separate thread and then figure out a way to update the progress bar in the UI thread based on the bytes downloaded from the web.
Can someone point me to code sample which demonstrates this interaction OR help me with their suggestions?
Thanks in advnace,
Shiva

NSURLRequest is asynchronous by default, so really all you need to do is prepare your NSURLRequests, fire them all off, and then in the delegate you can update the progress bar as each of them returns.
I'd suggest just having the progress bar update based on how many requests have completed out of the full set, rather than based on the number of bytes downloaded. NSURLResponse doesn't give you byte-by-byte callbacks, so it's quite hard to work out how far along an individual request has progressed.
Read the URL Loading Scheme document in the API - it's full of example code that you can use.

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import com.jscape.inet.ftp.*;
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Setting the transfer mode
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ftp.upload(new File("c:/tmp/test.txt"));
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// release the FTP server connection
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With Regards,
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I have tested a form from B1DE as given in elearning.
I have used VB.net and repeated all steps with this tool
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IPhone SDK - Sample code to download a file in a thread

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