> There are two self's, I.e. two different instances. The name 'self' isn't a
> single variable. It represents the object that's responding to the message,
> and executing the method.
>
> My guess is that one instance is created in the nib, and the other is
> created in code you wrote.
>
> Use the debugger. Set a breakpoint on the init methods and look at how it
> reaches that point.
I'm still trying to hunt down the second instance of 'self' that I'm
seeing but I don't understand something here.
@interface AppController : NSWindowController
{
MainViewController *mvc;
NSMutableArray *mainViewControllers;
}
…
@implementation AppController
- (id) init
{
...
mainViewControllers = [[NSMutableArray alloc] init];
// This is the 1st and should be only instance I create.
mvc = [[DataViewController alloc] initWithController:self];
[mainViewControllers addObject:mvc];
[mvc release];
...
}
- (void) awakeFromNib
{
[self displayViewController:[mainViewControllers objectAtIndex:0]];
}
- (void) displayViewController:(MainViewController *) mvc
{
NSWindow *win = [box window];
BOOL ended = [win makeFirstResponder:win];
if (!ended) {
NSBeep();
return;
}
// This is calling the 2nd instance which I can see w/ the debugger.
NSView *mv = [mvc view];
[box setContentView:mv];
}
@end
When I'm viewing the call stack in the debugger, I see that my
DataViewController's init method is called a second time from the line
… "NSView *mv = [mvc view]".
I'm doing view swapping just as is done in Hillegass's 3rd. ed. book.
So my DataViewController is subclassed from a MainViewController which
is an NSViewController.
I looked at the NSViewController docs but didn't anything about why
[NSViewController view] would send an init msg to the receiver.
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