cocos2d-x CCSprite 精靈監聽點擊事件

參考文章:

cocos2d-x 精靈監聽點擊事件

http://labs.easymobi.cn/?p=5167

實現過程，實現CCTouchDelegate接口，在enter 的時候添加監聽，exit 和析構時移除監聽，點擊時將touch 的坐標轉化為相對精靈的坐標，如果是否在精靈的范圍內，則響應點擊。主要是參考前面兩篇文章中的例子，不同的地方在判斷區域，個人覺得太復雜。所以稍微修改了下，看起來更容易理解。

PianoTile.h

class PianoTile : public cocos2d::CCSprite,public cocos2d::CCTouchDelegate
{
public:
    
    PianoTile();
    ~PianoTile();
    
    //life cycle
    virtual void onEnter();
    virtual void onExit();
    //touch
    virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);
    virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);
};

PianoTile.cpp

#include "PianoTile.h"
USING_NS_CC;

#pragma mark - Public Methods
PianoTile::~PianoTile()
{
    CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
    _delegate = NULL;
}

#pragma mark Lifecyle
void PianoTile::onEnter(){
    CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, false);
    CCSprite::onEnter();
}

void PianoTile::onExit(){
    CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
    CCSprite::onExit();
}

#pragma mark Touch Delegate

bool PianoTile::ccTouchBegan(CCTouch *pTouche, CCEvent *pEvent){
    CCPoint touchLocation = pTouche->getLocation();
    CCPoint localPoint = convertToNodeSpace(touchLocation);
    CCRect rect = CCRectMake(0, 0, boundingBox().size.width, boundingBox().size.height);
    bool isTouched = rect.containsPoint(localPoint);
    if (isTouched && _delegate) {
        _delegate->pianoTileClick(this);
    }
    
    return isTouched;
}

void PianoTile::ccTouchEnded(CCTouch *pTouche, CCEvent *pEvent){
    
}