download image from webpage, without showing webpage to user?

is there any method to download image from webpage, without showing webpage to user? one can do this through 'web ser开发者_开发知识库vice'. Is there any other??

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Have a look at NSURLConnection.

http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/URLLoadingSystem/URLLoadingSystem.html

You can also do this in C using CFNetwork.

http://developer.apple.com/library/mac/#documentation/Networking/Conceptual/CFNetwork/Introduction/Introduction.html