cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   gargantuan
   Member

   I need to create some compound sprites that will all move and rotate together. Since it's possible to change the position and rotation of an AtlasSpriteManager I've been trying to subclass so I can create a bunch of shortcuts like

   
CompoundSprite *cSprite = [CompoundSprite spriteManagerWithFile:@"sprites.png"];
[cSprite makeComplexSprite];


   internally, it looks a little like this

   
-(void)makeComplexSprite:
{
AtlasSprite *sp1 = [[AtlasSprite spriteWithRect:CGRectMake(0, 0, 64, 64)
spriteManager:self] retain];
AtlasSprite *sp2 = [[AtlasSprite spriteWithRect:CGRectMake(0, 0, 64, 64)
spriteManager:self] retain];
[self addChild:sp1];
[self addChild:sp2];
[sp1 setPosition:CGPointMake(0,0)];
[sp2 setPosition:CGPointMake(64,0)];
}


   However, when I run the applications, It crashes with the following exception

   
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AtlasSpriteManager makeComplexSprite]: unrecognized selector sent to instance 0x107e1c0


   Also, if I remove all the code inside 'MakeComplexSprite' and make it do nothing, I also get the same problem.

   It's looking like AtlasSpriteManager just doesn't like to be sub classed. Is this the case? If so, why, and how could I work around it?

   Posted 2 years ago #
2. 

   chrisco
   Member

   If this is your code copied straight from XCode, than you need to remove the colon after this line:

   -(void)makeComplexSprite:

   That's only used when you have an argument that needs to passed to the method

   Posted 2 years ago #
3. 

   gargantuan
   Member

   no, the colon was an error on here only.

   Posted 2 years ago #
4. 

   Karl
   Member

   It's saying that an instance of AtlasSpriteManager received the selector, not an instance of CompoundSprite, which means that somewhere in your code you are sending "makeComplexSprite" to the wrong instance.

   Check your warning messages, and check any places where you're pulling an id from a container and making calls against it, or places where you explicitly cast.

   Also make sure that [CompoundSprite spriteManagerWithFile] is actually returning a CompoundSprite and not an AtlasSpriteManager.

   Posted 2 years ago #

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