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Trouble with "self" in Carbon and Cocoa
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Trouble with "self" in Carbon and Cocoa


  • Subject: Trouble with "self" in Carbon and Cocoa
  • From: Jeffrey Mattox <email@hidden>
  • Date: Sat, 22 Mar 2003 04:23:33 -0600

I have a hotkey handler that needs to call a method using "self" but it causes a compile error. Elsewhere in my program I'm using "self" without error. The hotkey handler is a C routine because that's what I need in order to register it as the handler. Here's the outline:

#import <Cocoa/Cocoa.h>
#import <Carbon/Carbon.h>

@implementation NSApplication (mainline)

OSStatus HotKeyHandler(...)
{
[anObject aMethod]; // works for Foundation, et al
[self myCocoaMethod:YES]; // <--- causes "self" undeclared error
{

-(void) myCocoaMethod:(BOOL)flag
{
// never get here
}

@end

As a workaround, I can make it work by saving the value of "self" in another variable during initialization and use that later in my handler. E.g,:

NSApplication *mySelf;
...
{
...
mySelf = self;
}

I want to understand why the compiler is complaining. What must I to do to get "self" to work in HotKeyHandler()?

Jeff
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