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How do I separate two concatenated archives in an NSData?

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How do I separate two concatenated archives in an NSData?

Subject: How do I separate two concatenated archives in an NSData?
From: Charles Crowley <email@hidden>
Date: Fri, 13 Jan 2006 13:59:09 -0700

I am using sockets to send objects archived in NSData objects. I am using NSFileHandle's writeData: to send the archives and readInBackgroundAndNotify to read them. The problem is that if I send two close together I get only one notification and the NSFileHandleNotificationDataItem object seems to be the two archives concatenated together. When I do unarchiveObjectWithData: on them I get the first one and the error message "*** +[NSUnarchiver unarchiveObjectWithData:]: extra data discarded" and I lose the second one.

Getting them two at a time is fine with me but I'm not sure what a good way would be to separate them so that I can get both of them. Any ideas?

Thanks, Charlie Crowley

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