Re: NSNotificationCenter problem

FROM : Bill Bumgarner
DATE : Tue Nov 06 08:45:56 2007

On Nov 5, 2007, at 11:42 PM, Bill Bumgarner wrote:
> You can still swizzle methods, you just can't do it in the raw Obj-C 
> structures.  It is still considered naughty, but at least there is 
> API via which you can commit the naughtiness in a somewhat 
> predictable fashion (i.e. it'll do the right thing in terms of 
> threading & cache flushing, but you'll still be hosed if you put the 
> wrong IMP somewhere).
>
> Specifically:
>
>     OBJC_EXPORT BOOL class_addMethod(Class cls, SEL name, IMP imp, 
> const char *types);
>     OBJC_EXPORT IMP class_replaceMethod(Class cls, SEL name, IMP imp, 
> const char *types);


Dang it.  Hit deliver too soon.  The whole point was also to say that 
these APIs are available in the 32 bit -- the legacy ObjC -- runtime, 
too.  You can write one bit of code that'll behave the same in 32 bit 
and 64 bit.

Convenient and consistent, but it doesn't make it any more of a good 
idea to go and class_replaceMethod() on just any method of any class. ;)

b.bum