Apple

On May 1, 2005, at 5:55 AM, John James wrote:

I am probably doing some stupid newbie thing; please help.

i have a simple test case to try the selector feature. given the following class definition and implementation:
--------------
#import <Cocoa/Cocoa.h>

@interface Seltest : NSObject
{}
-(void)test1;
-(void)test2:(NSString*)val;
@end

-----------
#import "seltest.h"

@implementation Seltest

-(void)test1
{NSLog(@"test1");}

-(void)test2:(NSString*)val
{NSLog(val);}

@end
-------------------

Elsewhere At runtime I try the following

if ([Seltest respondsToSelector: @selector(test1:)]==YES)
NSLog(@"YES");
else
NSLog(@"NO");

I always get NO!
Shouldn't it be YES?

No. :) Well, it's giving you the answer you're asking for, just not the one you're expecting.

"test1:" and "test1" are entirely different selectors. In your case, the object responds to @selector(test1) but not to @selector(test:).

The colon is significant.

.chris

References:
	>Selector not working for me (From: John James <email@hidden>)