学习笔记之cocos2d-x2.1.1实现多个精灵的拖动

[cpp] view plaincopyprint?

场景中存在多个精灵，需要移动以安放在合适的位置，简单的move会出现精灵区域重叠的情况，稍微在ccTouchBegan函数中做修改就可以解决这个问题，每次移动当前ccTouchBegan点击下的那个精灵。需要开启ccTouchBegan和ccTouchMoved的代理，不然单单的setTouchEnabled(true);是没有效果的，还是直接看代码吧

[cpp]
bool HelloWorld::init()
{
    bool bRet = false;
    do
    {
        CC_BREAK_IF(! CCLayer::init());
        CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
            "CloseNormal.png",
            "CloseSelected.png",
            this,
            menu_selector(HelloWorld::menuCloseCallback));
        CC_BREAK_IF(! pCloseItem);
        pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 500));

        CCMenuItemImage *pSaveItem = CCMenuItemImage::create(
            "save_1.png",
            "save_2.png",
            this,
            menu_selector(HelloWorld::menuSaveCallback));
        CC_BREAK_IF(! pSaveItem);
        pSaveItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 100, 100));

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

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

        CCSprite* bg = CCSprite::create("bg.png");
        CC_BREAK_IF(!bg);
        bg->setPosition(ccp(s.width/2,s.height/2));
        this->addChild(bg);
        //////////////////////////////////////////////////////////////////////////
        TagCount = 0;

        CCSprite* sprite=CCSprite::create("1.png");
        CC_BREAK_IF(!sprite);
        sprite->setPosition(ccp(100,200));
        this->addChild(sprite,1,++TagCount);

        CCSprite* sprite2=CCSprite::create("2.png");
        CC_BREAK_IF(!sprite2);
        sprite2->setPosition(ccp(500,200));
        this->addChild(sprite2,2,++TagCount);

        CCDirector* pDirector = CCDirector::sharedDirector();
        pDirector->getTouchDispatcher()->addTargetedDelegate(this, 0, true);

        setTouchEnabled(true);
        bRet = true;
    } while (0);
    return bRet;
}
bool HelloWorld::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)
{
    int tag ;
    for (tag = 1;tag<=TagCount;tag++)
    {
        CCSprite* sprite= (CCSprite*)this->getChildByTag(tag);

        CCPoint touchPoint = pTouch->getLocationInView();
        touchPoint = CCDirector::sharedDirector()->convertToGL( touchPoint );

        CCRect rc1 = sprite->boundingBox();
        if (rc1.containsPoint(touchPoint))
        {
            pSprite = sprite;
            return true;
        }
    }
    return false;
}
void HelloWorld::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent)
{
    CCPoint beginPoint=pTouch->getLocationInView();
    beginPoint=CCDirector::sharedDirector()->convertToGL(beginPoint);

    CCPoint endPoint=pTouch->getPreviousLocationInView();
    endPoint=CCDirector::sharedDirector()->convertToGL(endPoint);

    CCPoint offSet =ccpSub(beginPoint,endPoint);
    CCPoint toPoint=ccpAdd(pSprite->getPosition(),offSet);
    pSprite->setPosition(toPoint);
}

bool HelloWorld::init()
{
bool bRet = false;
do
{
  CC_BREAK_IF(! CCLayer::init());
  CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
   "CloseNormal.png",
   "CloseSelected.png",
   this,
   menu_selector(HelloWorld::menuCloseCallback));
  CC_BREAK_IF(! pCloseItem);
  pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 500));

  CCMenuItemImage *pSaveItem = CCMenuItemImage::create(
   "save_1.png",
   "save_2.png",
   this,
   menu_selector(HelloWorld::menuSaveCallback));
  CC_BREAK_IF(! pSaveItem);
  pSaveItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 100, 100));

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

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

CCSprite* bg = CCSprite::create("bg.png");
CC_BREAK_IF(!bg);
&n

补充：移动开发 , 其他 ,