创建了许多CCSprit，但当触发ccTouchBegan时，会给出最后一个

Created many CCSprits but when triggering ccTouchBegan gives the last one allways

本文关键字：ccTouchBegan 最后一个 许多 CCSprit 创建      更新时间：2023-10-16

UPDATE我改为更简单的示例

好吧，现在我真的很困惑，我简化了这个类，因为我在网上读到的建议是更好地扩展CCNode而不是CCSprite并将其保留为CCNode的成员这是一个基于Hello-cpp的非常简单的例子
问题仍然存在，当触摸我打印的任何宝石实例时，最后一个添加的宝石，为什么
我希望每个Touch都能给我一个正确的实例，让bean接触（我打印id和名称）

我使用的是cocos2d-2.1rc0-x-2.13C++，我创建了10个CCSprite。我有这样扩展CCSprite和CCTargetedTouchDelegate的类：

Gem.cpp

#include "Gem.h"
Gem::Gem()
{
   ;
}
Gem::~Gem()
{
    ;
}
void Gem::onEnter()
{
    CCDirector* pDirector = CCDirector::sharedDirector();
    pDirector->getTouchDispatcher()->addTargetedDelegate(this, 0, true);
    CCNode::onEnter();
}
void Gem::onExit()
{  
    CCDirector* pDirector = CCDirector::sharedDirector();
    pDirector->getTouchDispatcher()->removeDelegate(this);
    CCNode::onExit();    
} 
bool Gem::ccTouchBegan(CCTouch* touch, CCEvent* event)
{       
    CCPoint touchPoint = touch->getLocation();   
    CCLOG("Gem Touched! ImageName:%s |GemId:%s  x:%f ,y:%f myspriteX:%f, myspriteY:%f nodePosX:%f nodePosY:%f",this->getImageName().c_str(),this->getGemId().c_str(),touchPoint.x,touchPoint.y,getGemSprite()->getPositionX(),getGemSprite()->getPositionY(),this->getPositionX(),this->getPositionY());
    return true;
}
void Gem::ccTouchMoved(CCTouch* touch, CCEvent* event)
{
    CCPoint touchPoint = touch->getLocation();  
}
void Gem::ccTouchEnded(CCTouch* touch, CCEvent* event)
{
}

宝石h

class Gem :public CCNode , public CCTargetedTouchDelegate 
{
public:
    Gem();
    virtual ~Gem();
    CC_SYNTHESIZE(std::string,imageName,ImageName)
    CC_SYNTHESIZE(std::string,gemId,GemId)
    CC_SYNTHESIZE(CCPoint,gemPos,GemPos)
    CC_SYNTHESIZE(CCSprite*,gemSprite,GemSprite)
    virtual void onEnter();
    virtual void onExit();
    virtual bool ccTouchBegan(CCTouch* touch, CCEvent* event);
    virtual void ccTouchMoved(CCTouch* touch, CCEvent* event);
    virtual void ccTouchEnded(CCTouch* touch, CCEvent* event);

};

helloWorldScene.cpp init（）方法

bool HelloWorld::init()
{
       bool bRet = false;
        //////////////////////////////////////////////////////////////////////////
        // super init first
        //////////////////////////////////////////////////////////////////////////
       if(!CCLayer::init())
        return false;
        CCSize m_winSize;
        CCSize visibleSize;
        CCPoint origin;
        m_winSize = CCDirector::sharedDirector()->getWinSize();
        visibleSize = CCDirector::sharedDirector()->getVisibleSize();
        origin = CCDirector::sharedDirector()->getVisibleOrigin();
        CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile("sprites.plist","sprites.png");
        CCSpriteBatchNode* gameBatchNode  = CCSpriteBatchNode::create("sprites.png"/*,200*/);
        CCSprite *bg= CCSprite::create("grideFinal.png");
        //bg->setAnchorPoint(ccp(0,0));
        bg->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
        this->addChild(bg,1);
        Gem* gem1 = new Gem();
        gem1->retain();
        gem1->setGemId("gem1");
        gem1->setImageName("img_1");
        gem1->setGemSprite(CCSprite::createWithSpriteFrameName("gem1.png"));
        Gem* gem2 = new Gem();
        gem2->retain();
        gem2->setGemId("gem2");
        gem2->setImageName("img_2");
        gem2->setGemSprite(CCSprite::createWithSpriteFrameName("gem2.png"));
        gem1->setAnchorPoint(ccp(0,0));
        gem2->setAnchorPoint(ccp(0,0));
        gem1->setPosition(ccp(0,0));
        gem2->setPosition(ccp(gem1->getGemSprite()->getContentSize().width,40));
        gem1->getGemSprite()->setAnchorPoint(ccp(0,0));
        gem2->getGemSprite()->setAnchorPoint(ccp(0,0));
        gem1->getGemSprite()->setPosition(ccp(0,0));
        gem2->getGemSprite()->setPosition(ccp(gem1->getGemSprite()->getContentSize().width,40));
        //gameBatchNode->addChild(gem1->getGemSprite(),4,44);
        //gameBatchNode->addChild(gem2->getGemSprite(),4,45);
        this->addChild(gameBatchNode);
        bg->addChild(gem1->getGemSprite(),50);
        bg->addChild(gem2->getGemSprite(),50);
        bg->addChild(gem1,50);
        bg->addChild(gem2,50);
        bRet = true;

    return bRet;
}

除了我触摸屏幕并触发Gem:：ccTouchBegan方法外，一切都很好。它总是给我最后一个CCSprite（我在屏幕上有50个）为什么？我在这里缺了什么？

因为每个Gem实例都扩展了CCTargetedTouchDelegate并注册了触摸调度器，所以只会触发最高或最新添加的。

那么，正确的方法是在HelloWorld类中实现CCTargetedTouchDelegate，当发生触摸时，检查触摸点触摸了哪个Gem。

以下是一种用于检查触摸是否在某个节点中的方法：

bool Gem::isTouchInside(CCTouch* pTouch)
{
    CCPoint touchLocation = pTouch->getLocation();
    CCRect rect =
    CCRectApplyAffineTransform(CCRectMake(0 ,
                                          0 ,
                                          this->getContentSize().width,
                                          this->getContentSize().height),
                               this->nodeToWorldTransform());
    return rect.containsPoint(touchLocation);
}
相关文章：