Re: [Pyobjc-dev] Categories (was: Subclassing NSTextField)

[Peter M. <zig...@po...>]

Yeah, I thought it looked a bit strange. I thought I'd send it to you 
anyway just in case.

Peter

On Thursday, December 19, 2002, at 02:51 AM, bb...@ma... wrote:

> On Wednesday, Dec 18, 2002, at 10:44 US/Eastern, Peter Montagner wrote:
>> I don't know if this is what you want but it may help:
>>
>> http://www.cocoadev.com/index.pl?MethodSwizzling
>
> Personally, I'm intimately familiar with method swizzling-- having 
> used it many times to wreak havoc upon an application. :-)
>
> His example isn't very good -- he could have used Posing to achieve 
> the same thing.
>
> The code is fairly clean, but has some issues. There is no need to 
> swizzle the types-- the types should not change without serious risk 
> of crashing.
>
> There is no need to actually declare a method.  His alt method could 
> easily have been declared as a C function:
>
> void alt_method(T *self, SEL _cmd) {
>     ...
> }
>
> This allows one to define the method without knowing the class 
> declaration in the first place-- which is where swizzling is most 
> useful (i.e. editing classes for which you do not have a declaration 
> that can be used to compile against).
>
> b.bum
>
>
>
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