How to access property from CCLayer?

Question

I am adding a layer to my scene and I want to check when it is fully loaded by setting a boolean after my initialization called doneInitializing to YES. But i need to access it somehow... How do I do that ?

LoadingScreen.h

@interface LoadingScreen : CCLayerColor{
    CCLayer *hWL;
}

LoadingScreen.m

hWL = [HelloWorldLayer node];

[self addChild:hWL];

if(hWL.doneInitializing == YES){ // that is where I get stuck
//do something

}

I can't access the variable doneInitializing... WHY ?

HelloWorldLayer.h

@interface HelloWorldLayer : CCLayer
{   
    BOOL doneInitializing;
}



@property (nonatomic,readwrite) BOOL doneInitializing;

HelloWorldLayer.m

@synthesize doneInitializing;

Is there a better approach to achieve this ??

score 2 · Accepted Answer · answered May 31 '12 at 13:42

Just change this part:

@interface LoadingScreen : CCLayerColor{
    CCLayer *hWL;
}

To this:

@interface LoadingScreen : CCLayerColor{
    HelloWorldLayer *hWL;
}

OR use this line instead:

if(((HelloWorldLayer *)hWL).doneInitializing == YES){

Compiler and the runtime needs to know you are getting a property of the HelloWorldLayer instead of the CCLayer. Although you are assigning hWL = [HelloWorldLayer node], hWL has been declared to be a plain CCLayer and the line with hWL.doneInitializing gets into trouble because as far as the runtime knows, a CCLayer does not have a property named doneInitializing. You need to tell the runtime "dude, hWL is a HelloWorldLayer" by declaring hWL as HelloWorldLayer or casting it to that class.

Perfect. Thank you :-) I couldn't have thought about that, but it is clear and obvious, thanks. — the_critic, May 31 '12 at 16:45

How to access property from CCLayer?

1 Answers1