Manual Animation doesn't work in Cocos2d-x

Question

I'm testing manual animation. However, the animation seems to have some issues, so it doesn't work.

These are the code. Can you take a look and let me where I'm wrong.

HelloWorldScene.h

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h" 
#include <string>
USING_NS_CC;

class HelloWorld : public cocos2d::CCLayerColor{
public:
// Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
virtual bool init();  

// there's no 'id' in cpp, so we recommend returning the class instance pointer
static cocos2d::CCScene* scene();

// a selector callback
void menuCloseCallback(CCObject* pSender);

// implement the "static node()" method manually
CREATE_FUNC(HelloWorld);    

virtual void onEnter();

protected:
CCSprite*    m_grossini;

};
#endif // __HELLOWORLD_SCENE_H__

HelloWorldScene.cpp

#include "HelloWorldScene.h" 

USING_NS_CC;

CCScene* HelloWorld::scene()
{
    CCScene *scene = CCScene::create();

    HelloWorld *layer = HelloWorld::create();

    scene->addChild(layer);

    return scene;
}

bool HelloWorld::init()
{
    if ( !CCLayerColor::initWithColor( ccc4(255,255,255,255) ) )
    {
        return false;
    }

    CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
    CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

    CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
                                        "CloseNormal.png",
                                        "CloseSelected.png",
                                        this,
                                        menu_selector(HelloWorld::menuCloseCallback));

    pCloseItem->setPosition(ccp(origin.x + visibleSize.width - pCloseItem->getContentSize().width/2 ,
                                origin.y + pCloseItem->getContentSize().height/2));

    CCMenu* pMenu = CCMenu::create(pCloseItem, NULL);
    pMenu->setPosition(CCPointZero);
    this->addChild(pMenu, 1);

    CCSize winSize = CCDirector::sharedDirector()->getWinSize();

    m_grossini = CCSprite::create("grossini.png");
    m_grossini->retain();
    this->addChild(m_grossini);
    m_grossini->setPosition(ccp(winSize.width/2, winSize.height/2));
    return true;
}

void HelloWorld::menuCloseCallback(CCObject* pSender)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT) || (CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
    CCMessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
#else
    CCDirector::sharedDirector()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif
#endif
}

void HelloWorld::onEnter(){
    CCAnimation* animation = CCAnimation::create();
    for( int i=1;i<15;i++)
    {
        char szName[100] = {0};
        sprintf(szName, "grossini_dance_%02d.png", i);
        animation->addSpriteFrameWithFileName(szName);
    }
    // should last 2.8 seconds. And there are 14 frames.
    animation->setDelayPerUnit(2.8f / 14.0f);
    animation->setRestoreOriginalFrame(true); 
    CCAnimate* action = CCAnimate::create(animation);
    m_grossini->runAction(CCSequence::create(action, action->reverse(), NULL));
}

I hope you can help me. Thank you so much!

Answer 1

Try following things:..

First of all remove this line m_grossini->retain(); because addchild automatically increase its retain count.

Found the problem..

As you are overriding the OnEnter method you need to call it manually for the base class. In your case adding the line:-

    CCLayerColor::onEnter();

in the OnEnter method will do the work.

In future be careful while overriding base class methods.