cocos2d for iPhone

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

1. 

   cheesev
   Member

   hi,

   i want to make sprite invisible after action

   my code:
   when touch event occur
   {
   ...

   waterAction = waterLeftAction; // waterLeftAction is animation!
   action = [CallFunc actionWithTarget:self selector:@selector(spriteActionFinished:)];
   [sprite runAction:[Sequence actions:waterAction, action, nil]];

   ...
   }

   after waterLeftAction, below method is called.

   -(void)spriteMoveFinished:(id)sender
   {
   AtlasSprite *sprite = (AtlasSprite *)sender;
   sprite.visible = NO; // Error!!!
   //sprite.position = ccp(500,500) // Error!!!
   }

   what is my problem?
   I want to hide sprite after waterLeftAction

   I need your help.

   Posted 2 years ago #
2. 

   gaminghorror
   Member

   If it crashes in this case then (id)sender is not of class AtlasSprite and you should not cast it to (AtlasSprite*). If both code fragments are in the same class then sender will be the same as self.

   You can check the class by using
   

   if ([sender isKindOfClass:[AtlasSprite class]])
   {
       // now it's always legal and safe to cast
       AtlasSprite* sprite = (AtlasSprite*)sender;
   }

   You are also using CallFunc to call spriteActionFinished but the method you pasted is called spriteMoveFinished. Maybe you got that mixed up?

   Posted 2 years ago #
3. 

   cheesev
   Member

   oh my god...
   thanks gaminghorror I fix my code!!

   but code you posted is not work for me

   -(void)spriteMoveFinished:(id)sender
   {
   if ([sender isKindOfClass:[AtlasSprite class]]) // error!!???
   {
   // now it's always legal and safe to cast
   AtlasSprite* sprite = (AtlasSprite*)sender;
   }
   }

   Posted 2 years ago #
4. 

   gaminghorror
   Member

   What kind of error? Even if sender is nil that should work, maybe sender is deallocated at this point, or not derived from NSObject.

   Can you post the "@interface ..." line from the header (.h) file?

   Posted 2 years ago #
5. 

   mobilebros
   Moderator

   Doesn't it need to be a CallFuncN action in order for any this to work correctly? A CallFunc just wants a function with no params doesn't it?

   Posted 2 years ago #
6. 

   crmagicxxx
   Member

   If you only want to make sprite invisible, then there is an action for that:
   

   id actHide = [CCHide action];

   Posted 2 years ago #
7. 

   Blue Ether
   Member

   @crmagicxxx: Oh, wow. I never realized there was a Hide action. Must have overlooked it somehow! Ah, so many scheduled selectors to just set self.visible=false....

   Posted 2 years ago #
8. 

   artakus
   Member

   @crmagicxxx is that a new method from newer Cocos2d? I was using 0.8.2. I still want to use the old one because I need to change a lots syntax if I move to the new one. Is 0.8.2 has that action too ?

   Posted 1 year ago #
9. 

   crmagicxxx
   Member

   @artakus sure, but it's called "Hide" without "CC"

   Posted 1 year ago #

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