Question

I have two scenes. Scene A is the game scene, where the level variable of type int changes. In class B I want to get the variable.

What I’ve got now is the following :

——————————— LevelDone.m ———————————

HelloWorldLayer *object = [[HelloWorldLayer alloc]init];

        int pointsForZeroStars = [[requiredPoints objectAtIndex:0] integerValue];
        int pointsForOneStar = [[requiredPoints objectAtIndex:1] integerValue];
        int pointsForTwoStars = [[requiredPoints objectAtIndex:2] integerValue];
        int pointsForThreeStars = [[requiredPoints objectAtIndex:3] integerValue];
        NSLog(@"HEALTH = %d",object.health);
        CCSprite *levelDoneWindow;         
        if ( object.health < pointsForZeroStars){
            NSLog(@"should be 0 stars");
            levelDoneWindow = [CCSprite spriteWithFile:@"leveldonescreen0stars.png"];
        }

NSLog returns the initial value of health which is 100, when actually it is something smaller than 100.

In the game class I call pushscene in order to call the LevelDone scene:

—————————– HelloWorldLayer.m (GAME SCENE) ————————————-

else{

    [[CCDirector sharedDirector] pushScene:[LevelDone node]];
    [self generateLevelFromPlist:level];


}

The -generateFromPlist method resets the health to 100. But it is certainly called after the NSLog method in my LevelDone.m class, which nonetheless prints out that health is 100.

How do I retrieve the value of this variable properly ?

Answer 1

Use a singleton to manage global values.

http://getsetgames.com/2009/08/30/the-objective-c-singleton/

Basically, you can create properties in that singleton class, and it will “persist” throughout the game no matter what scene you are in etc.