[Adium-devl] Plugin: Unable to add method to AIPreferenceController using category

[Ofri Wolfus]

At first glance your code looks fine except that #import "/Users/ 
henrik/Documents/Code/Cocoa/adium-1.0.2/Source/ 
AIPreferenceController.h" line. Why do you use a full path? #import  
"AIPreferenceController.h" or #import <Adium/ 
AIPreferenceController.h> should do it. Thinking about it, if you  
don't actually need any of AIPreferenceController's methods, @class  
AIPreferenceController; is supposed to do the trick (i think).

Try implementing +(void)load in your category and log something there  
to see if your category is actually being loaded. Also, print the  
value of [self class] in your +load implementation to see to what  
class the runtime is attaching your category.

- Ofri

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http://www.dpompa.com
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On 24/05/2007, at 15:25, Henrik Nyh wrote:

> I'm rather new at Cocoa/Objective-C, so please bear with me.
>
> I would like to write an Adium plugin that sticks incoming files in
> per-sender subdirectories of the download folder. So I might get
> "~/Incoming/IM/John Doe (ICQ)/pic.jpg" and so on.
>
> Having poked through the Adium source, I figured a good way to achieve
> this might involve overriding AIPreferenceController's
> -userPreferredDownloadFolder method. (If you have a better idea,
> please let me know.)
>
> However, I'm unable to override that method (using a
> category/swizzling). In fact, I'm unable to add any methods to the
> AIPreferenceController class.
>
> Any idea what I'm doing wrong?
>
> In the following test case, I can add and call methods on NSObject
> fine using categories, but when I call the method that I (thought I)
> added to AIPreferenceController, I get "selector not recognized".
>
>
> //// FileTransferFoldersPerSenderPlugin.h
>
> #import <Cocoa/Cocoa.h>
> #import <Adium/AIPlugin.h>
> #import <Adium/AIAdiumProtocol.h>
> #import <Adium/AIPreferenceControllerProtocol.h>
> #import "/Users/henrik/Documents/Code/Cocoa/adium-1.0.2/Source/ 
> AIPreferenceController.h"
>
> // Add "foobar" to AIPreferenceController
>
> @interface AIPreferenceController (MyCat)
> - (void)foobar;
> @end
>
> @implementation AIPreferenceController (MyCat)
> - (void)foobar {
> 	NSLog(@"FOOBAR!");
> }
> @end
>
>
> // Add "barbaz" to NSObject
>
> @interface NSObject (MyCat)
> - (void)barbaz;
> @end
>
> @implementation NSObject (MyCat)
> - (void)barbaz {
> 	NSLog(@"BARBAZ!");
> }
> @end
>
>
> // Plugin proper
>
> @interface FileTransferFoldersPerSenderPlugin : AIPlugin {
> }
> @end
>
>
>
> //// FileTransferFoldersPerSenderPlugin.m
>
> #import "FileTransferFoldersPerSenderPlugin.h"
>
> @implementation FileTransferFoldersPerSenderPlugin
>
> - (void)installPlugin {
>
> 	NSLog(@"FileTransferFoldersPerSenderPlugin loaded!");
> 		
> 	// This works:
> 	[[adium preferenceController] barbaz];
>
> 	// This doesn't:
> 	[(AIPreferenceController *)[adium preferenceController] foobar];
> 	// *** -[AIPreferenceController foobar]: selector not recognized
> [self = 0x5a6f00]
> 	
> }
>
> - (void)uninstallPlugin {
> 	NSLog(@"FileTransferFoldersPerSenderPlugin unloaded!");
> }
>
> @end
>
>
> Grateful for any help,
> Henrik N
>
> _______________________________________________
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> Adium-devl at adiumx.com
> http://adiumx.com/mailman/listinfo/adium-devl_adiumx.com

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