Question

How do I restart cocos2d scene and clean memory after the previous one?

[director replaceScene:s] is displaying pink screen. Can’t get it to work.

The work-around I made is below, however after closing scene this way app runs very slow and slowly reacts to touch. MainViewController.m:

- (IBAction)startScene { 

[CCTexture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGBA8888];

if ([director runningScene]) {
    [director end];
    works = NO;
}
if (!works) {
    EAGLView *glview = [EAGLView viewWithFrame:CGRectMake(0,0, 768, 1024)]; 
    [self.view addSubview:glview];
    [director setOpenGLView:glview];
    CCLayer *layer = [PlayLayer node];
    CCScene *s = [CCScene node];
    [s addChild: layer];
    [director runWithScene:s];
}

}

Inside PlayLayer.m I go back from scene to view using:

CCDirector *d = [CCDirector sharedDirector];
EAGLView *v = [d openGLView];
[v removeFromSuperview];

Application is displaying images (1280x960x32, imageview inside scrollview) and when user presses the button he can start cocos2d scene. User can then leave from scene back to view (.xib) and continue browsing through images till he finds a new one to start scene with.

I believe this is not a good way to leave scene but everything else I tried is causing app to crash or I keep getting this pink screen 2nd time I start scene. How do I restart it ?

Answer 1

Ok, found a solution that closes the scene from inside and works well.

While starting scene I add the notification observer in my viewcontroller:

(...)
[director runWithScene:s];
[[NSNotificationCenter defaultCenter] addObserver:self 
      selector:@selector(mySceneEnd:) name:@"scene_ended" object:nil];

That is connected to:

- (void) mySceneEnd:(NSNotification *)notif {   
    if ([director runningScene])
        [director end];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

Then in the scene ending method I’m sending the notification to my viewcontroller:

EAGLView *v = [[CCDirector sharedDirector] openGLView];
[v removeFromSuperview];
[[NSNotificationCenter defaultCenter] postNotificationName:@"scene_ended" 
     object:nil userInfo:nil];

Works really nice, app runs fast after closing scene, but it’s an old question/answer and there is surely a better way to do it now.