Thread "does not implement" error with CLASS method in error string?

I've got the common-seeming error for beginning thread programmers, ".. does not implement selector.." except that it lists a CLASS method, not an instance method. Which makes perfect sense it's defined as an instance method.. Code:

main app delegate header:

@interface LSSampleAppDelegate : NSObject <NSApplicationDelegate>
{
    NSWindow *window;
    LSDataObject labelOptions;
}
-(void) doPrintDisc: (LSDataObject*) labelOptions;
@property (assign) IBOutlet NSWindow *window;
//-(void) userDidClickStop:(id)sender;
@end

thread function first line (in delegate object):

-(void) doPrintDisc: (LSDataObject*) labelOptions {

thread laun开发者_如何学Cch code:

[NSThread detachNewThreadSelector: @selector(doPrintDisc:)
    toTarget: [self class]
    withObject: labelOptions];

The error:

*** -[NSThread initWithTarget:selector:object:]: target does not implement selector (*** +[LSSampleAppDelegate doPrintDisc:])

I know, the printDisc method should probably go in the labelOptions object and not the delegate - but I want to get this working before I make another modification.. I've had enough problem today with a malloc error of some kind that seems to show up, only to go away with no apparent reason (it says it's out of memory, but I seriously doubt that it really is unless the lightscribe library itself has a limit on its memory zone) - I assume that the library may run out of memory and then perhaps reset and then the error goes away for a while.

The really odd thing is - earlier today I think I had the thread code actually working..

Try:

[NSThread detachNewThreadSelector: @selector(doPrintDisc:)
toTarget: self
withObject: labelOptions];

instead.