cocos2d-x 支持按帧通知的帧动画类实现

支持按帧通知的帧动画类实现。

目前的cocos2d-x 2.1.4是不支持帧动画的第n帧播放时通知的功能的，但是也许你需要用，比如第5帧同时播放个音效，怎么办？ 参考我封装的类吧。

代码不详细说明，实在是不复杂。

使用说明：

1.A类继承CCAnimateDelegate，并实现completedAnimationFrame方法

2.CDelegateAnimate类对象调用setDelegate(A对象)

CDelegateAnimate.h

////  CDelegateAnimate.h//  Island of Jiang////  Created by apple on 13-7-11.////#ifndef __Island_of_Jiang__CDelegateAnimate__#define __Island_of_Jiang__CDelegateAnimate__#include "CCActionInterval.h"NS_CC_BEGINclass CDelegateAnimate;// 帧通知者基类class CCAnimateDelegate{public:    virtual void completedAnimationFrame(unsigned int frameId, CDelegateAnimate *pAnimate) = 0;};// 自定义帧动画类，支持桢播放通知class CDelegateAnimate : public CCAnimate {public:    CDelegateAnimate();    ~CDelegateAnimate();        /** creates the action with an Animation and will restore the original frame when the animation is over */    static CDelegateAnimate* create(CCAnimation *pAnimation);    virtual void update(float t);        // 注册通知者    CCAnimateDelegate* getDelegate();    void setDelegate(CCAnimateDelegate* pDelegate); // retain    protected:    CCAnimateDelegate *m_pAnimateDelegate;};NS_CC_END#endif /* defined(__Island_of_Jiang__CDelegateAnimate__) */

CDelegateAnimate.cpp

////  CDelegateAnimate.cpp//  Island of Jiang////  Created by apple on 13-7-11.////#include "CDelegateAnimate.h"#include "CCSprite.h"NS_CC_BEGINCDelegateAnimate::CDelegateAnimate(): m_pAnimateDelegate(NULL){    }CDelegateAnimate::~CDelegateAnimate(){    setDelegate(NULL);}//// Animate//CDelegateAnimate* CDelegateAnimate::create(CCAnimation *pAnimation){    CDelegateAnimate *pAnimate = new CDelegateAnimate();    pAnimate->initWithAnimation(pAnimation);    pAnimate->autorelease();        return pAnimate;}void CDelegateAnimate::update(float t){        CCAnimation* pAnimation = getAnimation();    // if t==1, ignore. Animation should finish with t==1    if( t < 1.0f ) {        t *= pAnimation->getLoops();                // new loop?  If so, reset frame counter        unsigned int loopNumber = (unsigned int)t;        if( loopNumber > m_uExecutedLoops ) {            m_nNextFrame = 0;            m_uExecutedLoops++;        }                // new t for animations        t = fmodf(t, 1.0f);    }        CCArray* frames = pAnimation->getFrames();    unsigned int numberOfFrames = frames->count();    CCSpriteFrame *frameToDisplay = NULL;        for( unsigned int i=m_nNextFrame; i < numberOfFrames; i++ ) {        float splitTime = m_pSplitTimes->at(i);                if( splitTime <= t ) {            CCAnimationFrame* frame = (CCAnimationFrame*)frames->objectAtIndex(i);            frameToDisplay = frame->getSpriteFrame();            ((CCSprite*)m_pTarget)->setDisplayFrame(frameToDisplay);                        // if register            if (m_pAnimateDelegate) {                m_pAnimateDelegate->completedAnimationFrame(m_nNextFrame, this);            }            m_nNextFrame = i+1;        }        // Issue 1438. Could be more than one frame per tick, due to low frame rate or frame delta < 1/FPS        else {            break;        }    }}CCAnimateDelegate* CDelegateAnimate::getDelegate(){    return m_pAnimateDelegate;}void CDelegateAnimate::setDelegate(CCAnimateDelegate *pDelegate){    CC_SAFE_RELEASE(dynamic_cast<CCObject*>(m_pAnimateDelegate));    m_pAnimateDelegate = pDelegate;    CC_SAFE_RETAIN(dynamic_cast<CCObject*>(m_pAnimateDelegate));}NS_CC_END