Re: Sending a custom object over NSConnection using socket ports

FROM : Adam Maxwell
DATE : Thu Jul 20 21:02:38 2006

On Thursday, July 20, 2006, at 10:26AM, Bryan Bonczek <<email_removed>> wrote:

>
>Hello all,
>
>I have been experiencing some difficulties using NSConnection (using socket ports) to send a message to a vended object that takes a custom object as a parameter.
>
>For example, if I have the following method in my vended object:
>
>-(void)receiveMessage:(MyCustomObject*)myObject
>
>and then I try to send a message to it, I get an NSInternalConsistencyError saying that the object cannot be unpacked.
>
>However, if I change the method to:
>
>-(void)receiveMessage:(NSString*)stringObject
>
>and send an NSString, the NSString gets unpacked just fine.
>
>
>Has anyone else encountered this problem?  Why does this work for Foundation objects and not my custom object?  Is there a protocol that MyCustomObject needs to implement in order for this to work?


It sounds like you need to implement NSCoding.  You may also want to implement replacementObjectForPortCoder: (see the docs for a sample implementation) if you want your object passed by copy.  It's also worth noting that NSPortCoder doesn't support keyed archiving.

hth,
Adam