NSWindowController awakeFromNib is being called twice

Question

I have an application that intends to create a popup window when a button is clicked. The popup window will load from a nib file. And so, the button is clicked and the window happily pops up. BUT, its awakeFromNib method gets called twice. Here's the code;

Application Delegate:

...

-(IBAction)myButton:(id)sender{

    printf("[settings]: button pressed\n");

    Config_SelectorSetup *selectorSetup = [[Config_SelectorSetup alloc] initWithWindowNibName:@"Config_SelectorSetup"];

    printf("about to load\n");

    [[selectorSetup window] makeKeyAndOrderFront:sender];

}

Config_SelectorSetup.m

- (id) initWithWindowNibName:(NSString *)windowNibName{

    printf("[initWithWindowNibName]\n");

    if( self = [super initWithWindowNibName:windowNibName] ){

        ...

    }

    return self;

}

- (void)awakeFromNib{

    printf("[awakeFromNib]\n");

    [self startScreen];
}

And here is the output:

[settings]: button pressed
[initWithWindowNibName]
about to load
[awakeFromNib]
[awakeFromNib]

Analyzing the call stack, first time it's called by [NSObject performSelector:] the second one by [NSIBObjectData nibInstantiateWithOwner:topLevelObjects:].

Can someone tell what am I doing wrong?

Thanks

Answer 1

Does Config_SelectorSetup.xib contain a Config_SelectorSetup object besides File's Owner?

Try logging self in awakeFromNib -

NSLog(@"self = %p", self);

Does it print the same address each time? If it's printing different addresses, chances are you have a Config_SelectorSetup object in your nib.

Answer 2

How many outlets do you have in your class and what is that class subclassing? I found with certain subclasses (NSDocument for instance), if you have multiple outlets connected, each nib object will fire the awakeFromNib method upon loading. NSLog your outlets to see if they output nil or an address.