Re: NSProxy
Re: NSProxy
- Subject: Re: NSProxy
- From: Brent Gulanowski <email@hidden>
- Date: Wed, 15 Jan 2003 12:08:22 -0500
On Tuesday, January 14, 2003, at 03:03 PM, The Amazing Llama wrote:
Going about my only idea for finding this memory leak (as mentioned in
NSZombie, the other thread I just started), I'm implementing a class
that pretends to be an NSNumber.
I figured that I should subclass from NSProxy. Then I looked at
NSProxy and realized that it gave me no features at all, and as far as
I can tell just makes my life interesting by selectively not
implementing a few things; -init for example. So... what's the point
of subclassing NSProxy? What DOES it give you, aside from bookkeeping?
NSProxy is used for interprocess communication, to represent a receiver
object in another task. See "Remote Messaging" in Inside Mac OS X:
Object Oriented Programming and the Objective-C Language. If you want
to imitate an existing class, I believe what you want is
+ (void) poseAsClass: (Class) aClass
Causes the receiving class to "pose as" its aClass superclass. The
receiver takes the place of aClass in the inheritance hierarchy; all
messages sent to aClass will actually be delivered to the receiver.
The receiver must be defined as a subclass of aClass . It can't
declare any new instance variables of its own, but it can define new
methods and override methods defined in aClass . The poseAsClass:
message should be sent before any messages are sent to aClass and
before any instances of aClass are created.
See
"
http://developer.apple.com/techpubs/macosx/Cocoa/Reference/Foundation/
ObjC_classic/Classes/NSObject.html#//apple_ref/occ/clm/NSObject/
poseAsClass:"
Because NSNumber is a class cluster, there might be complications, but
I don't know.
Brent Gulanowski
--
Mac game development news and discussion
http://www.idevgames.com
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| References: | |
| | >NSProxy (From: The Amazing Llama <email@hidden>) |