Problems with Obj-C

[Blorx2]

I'm in the middle of learning Obj-C through the FlipSquare tutorial because I've learned C++ and Lua already...I only have 3 problems/errors. :( The problems are in italics and this is the Game.h file, can anyone help me?

/* Game */

#import <Cocoa/Cocoa.h>
@class GameView, GameController;
enum { STATE_TITLE, STATE_PLAYING, STATE_GAME_OVER }
@interface Game : NSObject //parse error befor 'interface'

{
IBOutlet GameController *gameController;
IBOutlet GameView *gameView;
int state;
} //parse error before token '{'

- (void)setState: (int)newState; //fatal error metod definition not in class context (sorry, needed the space so that it wasn't a frown here on the forums)
- (int)state;
@end

[kelvin]

1) missing semi-colon after the enum.
2) the second error is symptomatic of the first.

[Blorx2]

ok, thanks :D

[Blorx2]

one last problem:

/* Game */

#import <Cocoa/Cocoa.h>
@class GameView, GameController;
enum; { STATE_TITLE, STATE_PLAYING, STATE_GAME_OVER }
@interface Game : NSObject

{
IBOutlet GameController *gameController;
IBOutlet GameView *gameView;
int state;
}

- (void)setState: (int)newState; //parse error before semi-colon
- (int)state;
@end

[nabobnick]

When he said after enum he meant this:

enum { STATE_TITLE, STATE_PLAYING, STATE_GAME_OVER }; // At the end

[Blorx2]

oh...oops, sorry

[Blorx2]

Sorry but: http://www.imagehosting.us/imagehosting/showimg.jpg/?id=410638
And the code:
#import "GameView.h"
#import "Game.h"
#import "GameView.h"

@implementation GameView

- (id)initWithFrame: (NSRect)frameRect
{
if ((self = [super initWithFrame:frameRect]) != nil) {
// Add initialization code here
}
return self;
}

- (void)drawRect: (NSRect)rect
{
}

switch([game state])
{
case STATE_TITLE:
[self displayTitle:rect];
break;

case STATE_PLAYING:
[self displayPlaying:rect];
break;

case STATE_GAME_OVER:
[self displayGameOver:rect];
break;

glFinish();
[[self openGLContext] flushBuffer];

- (void)displayTitle: (NSRect)rect { }

- (void)displayPlaying: (NSRect)rect {
glClearColor(0,0,1.0f,0);
glClear(GL_COLOR_BUFFER_BIT);
}

- (void)displayGameOver: (NSRect)rect { }
}

@end

[Fenris]

First error: the drawing code isnt' inside a method/function. I suppose you don't want both a { and a } after the switch, only one makes sense. Second error, you need the OpenGL headers included: #import <OpenGL/gl.h> at the top of your file. I think the other two errors are caused by these two. :) Good luck.

[Blorx2]

I suppose you don't want both a { and a } after the switch, only one makes sense.
Thanks and which one?

[Fenris]

Sorry, the {. That starts a function that you're closing a bit of ways down. The way you have it now starts a function, and ends it. The code that follows it is dangling freely.

[Blorx2]

So, what should I edit? Maybe you could fix the code by pasting it and editing as needed? Adding the OpenGL header does this, btw. wait, wrong link...

[Blorx2]

Ok, here are the errors http://www.imagehosting.us/imagehosting/showimg.jpg/?id=410653

[PowerMacX]

Try this:
#import "GameView.h"
#import "Game.h"
#import "GameView.h"
#import <OpenGL/gl.h>

@implementation GameView

- (id)initWithFrame: (NSRect)frameRect
{
if ((self = [super initWithFrame:frameRect]) != nil)
{
// Add initialization code here
}
return self;
}

- (void)drawRect: (NSRect)rect
{
switch([game state])
{
case STATE_TITLE:
[self displayTitle:rect];
break;

case STATE_PLAYING:
[self displayPlaying:rect];
break;

case STATE_GAME_OVER:
[self displayGameOver:rect];
break;
}

glFinish();
[[self openGLContext] flushBuffer];
}

- (void)displayTitle: (NSRect)rect
{
}

- (void)displayPlaying: (NSRect)rect
{
glClearColor(0,0,1.0f,0);
glClear(GL_COLOR_BUFFER_BIT);
}

- (void)displayGameOver: (NSRect)rect
{
}

@end

[Blorx2]

It built but, the window didn't open nd it said this:
[Session started at 2005-04-29 07:30:38 -0400.]
ZeroLink: unknown symbol '_glClearColor'

Executable “FlipSquare” has exited due to signal 6 (SIGABRT).

[kodex]

make sure to include the OpenGL headers and frameworks.

[Blorx2]

Which ones?

[kodex]

Well for started add the openGL framework then include openGL/opengl.h (i think thats the name)

[Blorx2]

I did that one...

[Blorx2]

The window doesn't open and I get this warning, /Users/matthew/FlipSquare/GameView.m:35: warning: `GameView' may not respond to `-openGLContext'

[Fenris]

Is GameView a subclass of NSOpenGLView? If not, you can set that through either IB or programmatically. How did you create the GameView class?

[Blorx2]

through IB, how would I do that programmatically?