CODEWITHSUNDEEP
objective-ccocos2d-iphone
mirx
mirx

Reputation: 158

Invoking a running CCLayer method from the AppController

I am currently programming a Cocos2d game for iOS.

In this game, I created a GameState singleton in order to save my game status (items details and positions, duration, score, etc.).

My main CCScene contains a -(void) saveData: method which, when invoked from within the running game (player hit the backToMenu button -> -(void) backToMenu:), performs accordingly:

We are sent back to the menu where, because GameState.sharedState -> PLAYING = true, a Resume button appear and allows us to resume the current game.

Until here, it works expectedly.

Now, how could I invoke the method -(void) backToMenu: from the appController's method applicationWillEnterBackground?

I tried invoking the [[CCDirector sharedDirector] runningScene] but it crashes somehow, also on resume, which means I am not even sure I saved proper contents.

Thanks in advance for your help.

Upvotes: 3

Views: 519

Answers (2)

mirx
mirx

Reputation: 158

Update: Just found about this. Could I, for example, create an NSNotification in the appController's applicationWillEnterBackground method, then handle it within my CCLayer object in which I'd add an NSObserver in its init method to receive such notifications?

Upvotes: 0

Guru
Guru

Reputation: 22042

Add this in AppDelegate.h :

@class CCLayer;

@interface AppController : NSObject <UIApplicationDelegate, CCDirectorDelegate,UIGestureRecognizerDelegate>
{
    CCLayer             *mCurrentLayer;

}

@property (nonatomic, retain) CCLayer *currentLayer;

Add this in AppDelegate.mm :

@implementation AppController
@synthesize currentLayer = mCurrentLayer;

In your Layer init class use this. In all scene method.

@implementation MyMainMenu

+(CCScene *) scene
{
    // 'scene' is an autorelease object.
    CCScene *scene = [CCScene node];

    // 'layer' is an autorelease object.
    MyMainMenu *layer = [MyMainMenu node];

    AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
    app.currentLayer = layer;

    // add layer as a child to scene
    [scene addChild: layer];

    // return the scene
    return scene;
}

You can check anywhere in project..

In appDelegate

-(void) applicationDidEnterBackground:(UIApplication*)application 
{
   if([self.currentLayer  isKindOfClass:[MyMainMenu class]])
   MyMainMenu *mm = (MyMainMenu*) self.currentLayer;
   [mm calFunction]; 
}

In other class:

-(void)callUpdateButtonsInLayer
{    
     AppController *app = (AppController*) [[UIApplication sharedApplication] delegate];
     if([app.currentLayer  isKindOfClass:[MyMainMenu class]])
     {
         MyMainMenu *mm = (MyMainMenu*) app.currentLayer;
         [mm calFunction]; 
     }
}

Upvotes: 1

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