Re: indeterminate number of arguments
Re: indeterminate number of arguments
- Subject: Re: indeterminate number of arguments
- From: Sherm Pendley <email@hidden>
- Date: Wed, 16 Feb 2011 18:26:53 -0500
On Wed, Feb 16, 2011 at 6:12 PM, Todd Heberlein <email@hidden> wrote:
> I see methods like this one (for NSArray) with an indeterminate number of arguments
>
> - (id)initWithObjects:(id)firstObj, ...
>
> How can I declare my own method like this
Just like above, with ..., as in:
- (id) initWithObjects:(id)firstObject, ...;
> and how, in the implementation, do I access the set of arguments passed in?
Using the va_* macros found in stdarg.h. For example:
- (id) initWithObjects:(id)firstObject, ... {
va_list args;
id nextObject;
NSMutableArray *arr = [NSMutableArray arrayWithObject:firstObject];
va_start(args, firstObject);
while (nextObject = va_arg(args, id)) {
[arr addObject:nextObject];
}
va_end(args);
}
sherm--
--
Cocoa programming in Perl:
http://camelbones.sourceforge.net
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