On May 12, 2012, at 3:39 PM, "mlist0...@gmail.com" <mlist0...@gmail.com> wrote:
> I've have come across some surprising behavior when trying to implement a
> document with two windows, each loaded from its own nib.
>
> In my NSDocument subclass, I have
>
> - (void) makeWindowControllers
> {
> NSWindowController* wc1 = [[[NSWindowController alloc]
> initWithWindowNibName:@"MNKDocument" owner:self]autorelease];
> [self addWindowController:wc1];
> [wc1 window]; // loads nib the first time it's called.
>
> NSLog(@"wc1->window = %@", [wc1 window]);
>
>
> NSWindowController* wc2 = [[[NSWindowController alloc]
> initWithWindowNibName:@"MNKDocumentSecondWindow" owner:self] autorelease];
> [self addWindowController:wc2];
> [wc2 window]; // loads nib the first time it's called.
>
> NSLog(@"wc2->window = %@", [wc2 window]);
> }
>
>
> wc1 is loading the default nib provided by Xcode's document-based app
> template. wc2 is loading a nib I made by simply duplicating the default nib.
>
> The "File's Owner" in both nibs is my document subclass. In the first nib
> file, the "File's Owner" has its "window" outlet connected to the window in
> the nib. Pretty vanilla.
>
> In the second nib, the File Owner's "window" outlet is disconnected. The
> window in the second nib is connected to the file owner's "secondWindow"
> outlet.
>
> After the nibs are loaded, I can see in the debugger that wc1->window points
> to the correct window, but wc2->window is nil. WTF?
Document-as-File's-Owner only makes sense if you aren't overriding
-makeWindowControllers.
Just make the window controllers themselves the File's Owner of the nib by
passing 'nil' for the owner argument to the initializer in your override of
-makeWindowControllers. Yes, that means a bit more refactoring might be
necessary in your nibs.
--Kyle Sluder
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