Download file from server plist

Hi all what i want to do is to download plist from server http:// and i'd like to know how and where it is stored.

Can the iphone compare date from 2 plist files ? ?

thanks to all, if you do not want to post code or explain please link it. !Because i'm really stuck and need开发者_运维技巧 help

thanks

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If you're downloading the file, you can use the Last-Modified header in the (e.g.) NSHTTPURLResponse object to determine if the file has been modified on the server since it was last modified locally. Use the -compare: method on two NSDate objects (one parsed from the header, one obtained from the local file system) to determine which is later.