Problem with importing a int variable in other class

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Problem with importing a int variable in other class

(5 posts) (3 voices)

Started 4 months ago by yakultjapa
Latest reply from yakultjapa

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yakultjapa
Member

Hello guys,

I have two layer: GameplayLayer and HUDLayer. In game have a limited number of victims to throw to a vulcan and I need check how many victims the player has and I need to show in a HUD, but I having problem to import this variable right. Well, when I debug, the variable I'm using in GameplayLayer show that I have only one victim, but in HUDLayer show that I have 68 victims. I don't know what is happening and I try to Googled but still don't understand why is this happening.

I'm new in Object-C and Cocos2D and my english is not good.

Thanks

Gameplay.h

#import <Foundation/Foundation.h>
#import "CCLayer.h"
#import "cocos2d.h"
#import "Box2D.h"
#import "GLES-Render.h"
#import "MyContactListener.h"
#import "CCPanZoomController.h"

@interface GameplayLayer : CCLayer
{
int limiteVitima;
}
+(int)mensagemVitima;

Gameplay.mm

@implementation GameplayLayer

+(int)mensagemVitima
{
    CCLOG(@"ENTRANDO NA MENSAGEM VITIMA");
    return limiteVitima;
}

HUDLayer.h

#import <Foundation/Foundation.h>
#import "CCLayer.h"
#import "cocos2d.h"
#import "GameplayLayer.h"

@interface HudLayer : CCLayer
{
@public
    int limiteVitima;
}

HUDLayer.mm

#import "HudLayer.h"
#import "GameplayLayer.h"

@implementation HudLayer

-(void)criaHud
{
    CCLOG(@"CRIOU HUD");
    CCLOG(@"limite vitima HUD antes de MensagemVitima -- %i", limiteVitima);
    limiteVitima = [GameplayLayer mensagemVitima];
    vitimaHud=[NSString stringWithFormat:@"%d", limiteVitima];
    vitimaLabelNumero= [CCLabelTTF labelWithString:@"%@" fontName:@"Helvetica" fontSize:16];
    [vitimaLabelNumero setString:[NSString stringWithFormat:@"%@",vitimaHud]];
    [vitimaLabelNumero setPosition:ccp(80, 470)];
    [self addChild:vitimaLabelNumero];
}

-(id)init
{
    if((self = [super init]))
    {
        [self schedule:@selector(updateHUD:) interval:0];
        [self criaHud];
    }
    return self;
}

-(void)atualizaHUD
{
    limiteVitima = [GameplayLayer mensagemVitima];
    vitimaHud=[NSString stringWithFormat:@"%d", limiteVitima];
    [vitimaLabelNumero setString:[NSString stringWithFormat:@"%@",vitimaHud]];
}

-(void)updateHUD:(ccTime)dt
{
    CCLOG(@"limiteVitima HUD -- %i", limiteVitima);
    [self atualizaHUD];

}

Posted 4 months ago #

Birkemose
Moderator

Very creative use of factory methods, but it wont work.

Provide your gamelayer as a parameter to your hud in some way, and grab the number of victims as a property.

Posted 4 months ago #
yakultjapa
Member

Thanks for reply, but I don't understand well what you are saying.

If you have some example to help to understand better what is "provide a parameter".

Posted 4 months ago #

davidlxk
Member

in your header files for both players, you could have them as properties of each other like this:

HUDLayer.h

#import <Foundation/Foundation.h>
#import "CCLayer.h"
#import "cocos2d.h"
#import "GameplayLayer.h"

@interface HudLayer : CCLayer {
@public
    int limiteVitima;
    GameplayLayer *gameplayLayer;
}
@property (nonatomic,readwrite) int limiteVitima;
@property (nonatomic,retain) GameplayLayer *gameplayLayer;
@end

and synthesize the properties in the implementation file
HUDLayer.mm

@implementation HudLayer
@synthesize gameplayLayer;
@synthesize limiteVitima;

-(void)criaHud
{
    CCLOG(@"CRIOU HUD");
    CCLOG(@"limite vitima HUD antes de MensagemVitima -- %i", limiteVitima);
    limiteVitima = [GameplayLayer mensagemVitima];
    vitimaHud=[NSString stringWithFormat:@"%d", limiteVitima];
    vitimaLabelNumero= [CCLabelTTF labelWithString:@"%@" fontName:@"Helvetica" fontSize:16];
    [vitimaLabelNumero setString:[NSString stringWithFormat:@"%@",vitimaHud]];
    [vitimaLabelNumero setPosition:ccp(80, 470)];
    [self addChild:vitimaLabelNumero];
}

-(id)init
{
    if((self = [super init]))
    {
        [self schedule:@selector(updateHUD:) interval:0];
        [self criaHud];
    }
    return self;
}

-(void)atualizaHUD
{
    limiteVitima = [GameplayLayer mensagemVitima];
    vitimaHud=[NSString stringWithFormat:@"%d", limiteVitima];
    [vitimaLabelNumero setString:[NSString stringWithFormat:@"%@",vitimaHud]];
}

-(void)updateHUD:(ccTime)dt
{
    CCLOG(@"limiteVitima HUD -- %i", limiteVitima);
    [self atualizaHUD];

}

and also do the same for the game play layer

Gameplay.h

#import <Foundation/Foundation.h>
#import "CCLayer.h"
#import "cocos2d.h"
#import "Box2D.h"
#import "GLES-Render.h"
#import "MyContactListener.h"
#import "CCPanZoomController.h"
#import "HUDLayer.h"

@interface GameplayLayer : CCLayer {
    int limiteVitima;
    HudLayer *hudLayer;
}
+(int)mensagemVitima;
@property (nonatomic,readwrite) int limiteVitima;
@property (nonatomic,retain) HudLayer *hudLayer;

@end

Gameplay.mm

@implementation GameplayLayer
@synthesize limiteVitima;
@synthesize hudLayer;

+(int)mensagemVitima {
    CCLOG(@"ENTRANDO NA MENSAGEM VITIMA");
    return limiteVitima;
}

then after which in the scene which you add the two layers to, you can set the properties for each like this:

scene.mm

#import "HUDLayer.h"
#import "Gameplay.h"

- (id) init {

    if ((self = [super init])) {

        HudLayer *hudLayer = [HudLayer node];
        GameplayLayer *gameplayLayer = [GameplayLayer node];

        [hudLayer setGameplayLayer:gameplayLayer];
        [gameplayLayer setHudLayer:hudLayer];

        [self addChild:gameplayLayer];
        [self addChild:hudLayer];

    }

    return self;

and then lastly in either of the two layers you can get the properties of each layer like for example in game play layer,

Gameplay.mm

int var = [hudLayer limiteVitima];

or in hud layer,
HUDLayer.mm

int var = [gameplayLayer limiteVitima];

Posted 4 months ago #

yakultjapa
Member

Thanks for help, davidlxk

I tried your answer but it giving this error on HudLayer.h, I don't know why:

ISO C++ forbids declaration of 'GameplayLayer' with no type

Someone can explain for me???

and building on this topic, wanted to know if I don't have any knowledge of C and C++ will make the programming in Objective - C more difficult??? If yes, can recommend some hint to search for info like books or tutorials to learn better????

Sorry again by my bad english

Posted 4 months ago #

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