NSData from a custom object

问题:

I'm working on client/server application which uses AsyncSocket. For transferring data, it uses NSData.

How can I insert my custom object, containing NSNumbers, NSIntegers, and NSStrings into an NSData object and then get it back out?

回答1:

One way to insert (serialize) a custom object into an NSData object is to use NSCoding and NSKeyedArchiver.

First, have your custom object implement the NSCoding protocol.
Example here: http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Archiving/Articles/codingobjects.html#//apple_ref/doc/uid/20000948-97234

Then, for information on using your object with NSKeyedArchiver refer to:
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Archiving/Articles/creating.html

Hope that helps!