cocos2d for iPhone

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

1. 

   xu222333
   Member

   Anybody help me, i am a newbie for cocos2d game developer

   Now i want to do two animations, one is walking animation and how to switch to jumping animation after i change the status of sprite.

   I tried the CCCallFunc method, but it can not work on animation!

   Thanks!

   Posted 1 year ago #
2. 

   asymptote
   Member

   First check the cocos-templates.
   Go through the following:
   CCSequence, CCCallFunc

   I have no idea where exactly you are facing the problem, you need to post some code. Do not expect us to write tutorials here.

   Posted 1 year ago #
3. 

   xu222333
   Member

   oh, here is the code:

   - (void) runAnimationDAnim
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:dAnim];
   CCCallFunc * func = [CCCallFunc actionWithTarget:self selector:@selector(onCallFunc)];
   CCSequence * seq = [CCSequence actions:animate, func, nil];

   [zombieSprite runAction:seq];
   }

   // this work
   - (void) onCallFunc
   {
   [zombieSprite runAction:[CCMoveBy actionWithDuration:2 position:ccp(200,200)]];

   }

   // this does not work
   - (id) onCallFunc
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:walkAnim];
   CCSequence * seq = [CCSequence actions:animate,nil];

   [zombieSprite stopAllActions];
   [zombieSprite runAction:seq];//
   }

   Posted 1 year ago #
4. 

   xu222333
   Member

   sorry, updated the code:

   - (void) runAnimationDAnim
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:dAnim];
   CCCallFunc * func = [CCCallFunc actionWithTarget:self selector:@selector(onCallFunc)];
   CCSequence * seq = [CCSequence actions:animate, func, nil];

   [zombieSprite runAction:seq];
   }

   // this work
   - (void) onCallFunc
   {
   [zombieSprite runAction:[CCMoveBy actionWithDuration:2 position:ccp(200,200)]];

   }

   // this does not work
   - (void) onCallFunc
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:walkAnim];
   CCSequence * seq = [CCSequence actions:animate,nil];

   [zombieSprite stopAllActions];
   [zombieSprite runAction:seq];//
   }

   Posted 1 year ago #
5. 

   asymptote
   Member

   - (void) runAnimationDAnim
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:dAnim];
   CCCallFunc * func = [CCCallFunc actionWithTarget:self selector:@selector(onCallFunc)];
   CCSequence * seq = [CCSequence actions:animate, func, nil];
   
   [zombieSprite runAction:seq];
   }

   // this work
   - (void) onCallFunc
   {
   [zombieSprite runAction:[CCMoveBy actionWithDuration:2 position:ccp(200,200)]];
   }

   // this does not work
   - (void) onCallFunc
   {
   CCAnimate * animate = [CCAnimate actionWithAnimation:walkAnim];
   CCSequence * seq = [CCSequence actions:animate,nil];
   
   [zombieSprite stopAllActions];
   [zombieSprite runAction:seq];//
   }

   What do you mean by "this does not work"? Does the execution reach this method? What is the error you are getting? Depending on the error, may be your walkAnim is nil? post the error from the console.

   Posted 1 year ago #
6. 

   xu222333
   Member

   =======＋＋＋＋＋＋＋＋＋＋========
   2011-03-15 21:56:01.173 TD_2011_03_03[298:207] dealloc: <LoadingScene = 0023B6A0 | Tag = -1>
   Program received signal: “EXC_BAD_ACCESS”.
   (gdb)

   above is the error message when run the walkAnim.

   Posted 1 year ago #
7. 

   xu222333
   Member

   oh, I found the error that the walkAnim is nil, but I don't understand why is nil? dAnim and walkAnim all set in the init method, why it become nil after I run the dAnim action.

   Posted 1 year ago #
8. 

   asymptote
   Member

   :p that's for you to figure out :D

   Posted 1 year ago #
9. 

   Dan
   Member

   Are they being autoreleased at the end of the init method? You may want to make sure they are being properly retained.

   Posted 1 year ago #
10. 

    Duckwit
    Member

    On the subject of not retaining memory -

    If @xu222333 tagged his animations, he could access them securely with the tag, right?

    Posted 1 year ago #
11. 

    cjl
    Member

    @Duckwit:

    If @xu222333 tagged his animations, he could access them securely with the tag, right?

    I don't think that's true. A 'tag' is a property that instances inherit from the CCNode class, and I don't think the act of setting a tag has anything to do with memory.

    However, many people set a tag when they add and instance as a child of a layer or scene, and the addChild method does increase the retain count of an instance by one.

    Posted 1 year ago #

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