macOS Objective C custom class problems.

[cromestant]

Hello, i'm trying to get some basic custom class to work on objective-c but can t even get it to compile, yet i see no problems with it, am hoping for some help from these forums.

Ok first of all the idea:
simple app, 1 button on NIB, 1 AppControler with 1 (IBAction) method that is called when the button is pressed.

apart from that i have one custom class called test ( code comming after)

all this class does is have one method for printing some things to NSLog ( experimenting still with this).

Basically, what I want is to pass the AppController instance to the test class instance , so that from the test class ( threaded later on) call a method on the original object ( like for updating a gui).

THe idea is for me to get this working so that i can finish my twitter program. I made a simple twitter client, but when requests took too long, the gui freezed, i packaged the twittter "api" into a class, and made it work with the class ([twitter sendUpdate"works!"]) but I still had the "locking" of the gui.

So i want to make all the calls to twitter happen OFF main thread, i ve basically got it working for the update, but it did not work for the others that actually have a response that matters ( the response needs to be passed back to main thread so that I can update the gui) ,so the idea was to instantiate the twitter client passing the object a back-reference to the instantiator object..

I know i m not beeing to clear here, hope you can understand me anyway.

here is the sample code i m doing that does not compile :
AppController.h

#import <Cocoa/Cocoa.h>
#import "test.h"

@interface AppController : NSObject {
	test *t;
}
-(IBAction) startVerga:(id)sender;
-(void)diecrap:(id)sender;
@end

AppController.m

#import "AppController.h"
@implementation AppController
-(void)awakeFromNib{
	t = [[test alloc] initWithAppcontroller:self];
}
-(IBAction) startVerga:(id)sender
{
	NSLog(@"Clicked on button");
}
-(void)diecrap:(id)sender
{
	NSLog(@"llegue a crap!");
}
@end

test.h

#import <Cocoa/Cocoa.h>
#import "AppController.h"

@interface test : NSObject {
	AppController *cont;
}
-(id)initWithAppcontroller:(AppController *)con;
@end

test.m

//

#import "test.h"


@implementation test
-(id) initWithAppcontroller:(AppController *)con
{
	self=[super init];
	cont = con;
	return self;
}
@end

I can t seem to find the "proper" way to do this, or have not been able to understand it...
any help on how this is usually done ( worker threads gathering data for the gui, these threads could instantiate objects etc...).

simple sample code is hard to find in this world of cocoa....

 

[kainjow]

That approach seems fine to me. What error are you getting?

Instead of putting the #import xxx in the header file, put it in the implementation (.m) file and in the .h file replace it with "@class xxx;" where xxx is the name of the class.

For example this:

#import <Cocoa/Cocoa.h>
[color=red]#import "test.h"[/color]

@interface AppController : NSObject
...

would become this:

#import <Cocoa/Cocoa.h>
[color=red]@class test;[/color]

@interface AppController : NSObject
...

and the #import "test.h" would go in the .m file instead. This might be why you're getting an error.

 

[cromestant]

thanks, that did the trick, it now compiles...!!!

I did not know bout that

@class classname

what is that called?

 

[autorelease]

thanks, that did the trick, it now compiles...!!!

I did not know bout that

@class classname

what is that called?

It's called forward declaration.