How to create a new instance of an AppController in the NIB

Following the steps in Aaron Hillegass' SpeakLine tutorial in Chapter 5 of "Cocoa(R) Programming for Mac(R) OS X (3rd Edition)", I got lost on how to add the AppController to the nib. I found out this is what you need to do:

Assuming you've already added the "AppController.m" and "AppController.h" Objective C files to your project.

1. From Interface Builder, go to Tools > Library
2. Find NSObject under "Library - Cocoa - Objects & Controllers"
3. Drag that into the NIB window (i.e. - MainMenu.xib)
4. Rename the new NSObject to "AppController"
5. With the "AppController" object highlighted, go to Tools > Identity Inspector, drill down on the "Class" field and select "AppController"
6. Your AppController class is now added to the nib

Accessor Methods: "Retain, then Release" methodology

From "Cocoa(R) Programming for Mac(R) OS X (3rd Edition)" by Aaron Hillegass

If you have a nonpointer type, the accessor methods are quite simple. For example, if your class has an instance variable called foo of type int, you would create the following accessor methods:

- (int)foo
{
return foo;
}

-(void)setFoo:(int)x
{
foo = x;
}

MATTERS BECOME MORE COMPLICATED IF FOO IS A POINTER TO AN OBJECT. In the "setter" method, you need to make sure that the new value is retained and the old value released, as shown below:

-(void)setFoo:(NSCalendarDate *)x
{
[x retain];
[foo release];
foo = x;
}