Re: Creating an NSInvocation from an NSMethodSignature
Re: Creating an NSInvocation from an NSMethodSignature
- Subject: Re: Creating an NSInvocation from an NSMethodSignature
- From: Mike Mangino <email@hidden>
- Date: Tue, 12 May 2009 11:13:01 -0400
On May 12, 2009, at 9:43 AM, Michael Ash wrote:
[snip]
This is actually surprisingly easy.
(Caveat: I have not actually done this.)
Use -methodForSelector: to get the IMP for a nonexistent method. This
IMP will be a function pointer straight to the runtime's forwarding
machinery. Then install that IMP as the implementation for your
overridden methods. Callers will go straight into the forwarding
machinery rather than into your overridden methods, which will then
invoke -forwardInvocation: as usual and you can then do as you like.
Since I haven't ever tried this, I'd be very interested to know how it
works for you if you try it.
Brilliant! It works perfectly. Now I just need to wire up a bunch of
plumbing and I'll have a patch that handles actual partial mocks.
Mike
Mike
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--
Mike Mangino
http://www.elevatedrails.com
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