Well, before this goes any further, I'm going to go ahead and answer my own
question here.
The problem is that in the code below, I'm actually instantiating two
AppController objects, one in each NIB. So, one AppController doesn't have any
idea about the other AppController, and can't get to it's string.
The solution I've come up with is to replace my window controller class with a
simple call to NSBundle to load the NIB, setting AppController as the owner of
the second NIB. Then, in IB, I set the identity of File's Owner to
AppController, delete the NSObject, and bind the button to the IBAction in the
File's Owner.
It's great to solve my own problems, I just wish I'd do it before sending out
to Cocoa-Dev for help!
-- Jon
On Jan 16, 2010, at 6:45 PM, Jonathan Buys wrote:
> Hello,
>
> I have an AppController that looks like this:
>
> AppController.h:
> #import <Cocoa/Cocoa.h>
> @class PostController;
>
> @interface AppController : NSObject
> {
> PostController *postController;
> NSString *theString;
> }
>
> - (IBAction)setString:(id)sender;
> - (IBAction)viewString:(id)sender;
>
> - (void)processString;
>
> @end
>
> AppController.m:
>
> #import "AppController.h"
> #import "PostController.h"
>
> @implementation AppController
>
>
> - (IBAction)setString:(id)sender
> {
> // Is postController nil?
> if (!postController) {
> // NSLog(@"Post Controller was nil.");
> postController = [[PostController alloc] init];
> }
>
> // NSLog(@"Showing %@", postController);
> [postController showWindow:self];
>
> theString = @"The String";
>
> NSLog(@"Current Selected Site: %@", theString);
> [self processString];
> }
>
> - (IBAction)viewString:(id)sender
> {
> NSLog(@"viewString Method: %@", theString);
> [self processString];
> }
>
> - (void)processString
> {
> NSLog(@"processString Method: %@", theString);
> }
>
>
> @end
>
> I have two XIB files, MainMenu and NewPost. I've dragged an NSObject into
> each XIB, and set it's class to AppController. In MainMenu, I have two
> buttons, one bound to the setString action, and one set to the processString
> action. In MainMenu XIB, I can see theString in the NSLog output. In the
> NewPost XIB, I have one button bound to the processString method, but from
> this XIB, every time I run the processString method, theString is null.
>
> How can I define a variable (like NSString) in one XIB, and be able to access
> it from methods triggered from another XIB?
>
> I've got a simple Xcode project that shows this problem, if it would help
> with explaining it.
>
> Thanks,
>
> Jon
>
> PS. Here is the PostController too, just in case:
>
> #import <Cocoa/Cocoa.h>
>
>
> @interface PostController : NSWindowController
> {
> }
>
> @end
>
>
> #import "PostController.h"
> #import "AppController.h"
>
>
> @implementation PostController
>
> - (id)init
> {
> if (![super initWithWindowNibName:@"NewPost"])
> return nil;
>
> return self;
> }
>
>
> - (void)windowDidLoad
> {
> NSLog(@"Nib file is loaded!");
> }
>
> @end
>
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