Your explanation below was super helpful. I tried passing a reference
to the app controller directly as you suggest at the bottom, and that
worked.
Judging from the rest of what you wrote, I see that my next readings
should be on delegation and the responder chain. I will try those
approaches next. And as you mention, duplicate code was bothering me,
so I will try to put the window-opening code all in one place as well.
Thanks!
On Jan 20, 2008, at 5:45 AM, Ken Thomases wrote:
The nib should not contain an instance of a NSWindowController-
derived class. An NSWindowController is intended to be the owner
of the nib. As such, it's outside of the nib -- "above" it, in a
certain sense. So, when it comes time to load WindowC.nib, you do:
In the nib, you would set the class of File's Owner to
WindowCController. You'd also connect its "window" outlet to the
window in the nib. Then, anywhere that some other part of the code
needs to refer to WindowC, you use this expression:
[myWindowCController window]
If you want the WindowCController instance to know about the other
windows, you can add some ivars to it and set them up. You can do
that immediately after the alloc-init statement, above, or actually
define your own custom init... method that takes additional arguments.
One thing that might be confusing you: you might want a controller
which manages the window controllers. Often, there's an
application controller, which might also be the application
delegate. This application controller is what knows about the
various nibs and window controller classes. So, it is what would
allocate and initialize the WindowCController instance, as
illustrated above except that myWindowCController would not be a
local variable, it would be an instance variable. The application
controller would also have the "global" overview sufficient to
connect the various nibs and window controllers to each other.
How does a WindowCController get a pointer to the application
controller? Well, it could be given one explicitly by the
application controller when it creates the WindowCController
instance. Or, the WindowCController can just use [NSApp delegate].
-Ken
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