ClickAndMoveTest

关于ccTouchesEnded看这个博客即可

http://blog.linguofeng.com/archive/2012/09/12/cocos2d-x-touch.html

class ClickAndMoveTestScene : public TestScene
{
public:
    virtual void runThisTest();
};

class MainLayer : public CCLayer
{
public:
    MainLayer();
    virtual void ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent);
};

void ClickAndMoveTestScene::runThisTest()
{
//创建目标图层
    CCLayer* pLayer = new MainLayer();
    pLayer->autorelease();
//添加图层
    addChild(pLayer);
//替换场景，让改场景为运行时场景
    CCDirector::sharedDirector()->replaceScene(this);
}

//目标图层类的构造函数
MainLayer::MainLayer()
{
//开启多点触控
    setTouchEnabled(true);
    
    CCSprite* sprite = CCSprite::create(s_pPathGrossini);
//设置背景颜色
    CCLayer* layer = CCLayerColor::create(ccc4(255,255,0,255));
    addChild(layer, -1);
        
    addChild(sprite, 0, kTagSprite);
    sprite->setPosition( ccp(20,150) );
//对精灵做动作，这里精灵和背景层不在同一树种
    sprite->runAction( CCJumpTo::create(4, ccp(300,48), 100, 4) );
//对背景层做动作，1.淡进，2.淡出，重复执行这两个动作
    layer->runAction( CCRepeatForever::create( 
                                                        (CCActionInterval*)( CCSequence::create(    
                                                                            CCFadeIn::create(1),
                                                                            CCFadeOut::create(1),
                                                                            NULL) )
                                                        ) ); 
}

//处理松开事件
void MainLayer::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent)
{
//获取第一个点
    CCSetIterator it = pTouches->begin();
    CCTouch* touch = (CCTouch*)(*it);
    
    CCPoint location = touch->getLocation();

    CCNode* s = getChildByTag(kTagSprite);
//停止所有动作
    s->stopAllActions();
//向该点移动
    s->runAction( CCMoveTo::create(1, ccp(location.x, location.y) ) );
//计算精灵的旋转角度，要让头部向着移动方向    
    float o = location.x - s->getPosition().x;
    float a = location.y - s->getPosition().y;
//先通过atoanf 计算出反正弦弧度值，然后通过宏转换成角度值
    float at = (float) CC_RADIANS_TO_DEGREES( atanf( o/a) );
//在Cocos2D-x中，顺时针为正,逆时针为负
    if( a < 0 ) 
    {
        if(  o < 0 )
            at = 180 + fabs(at);//为什么这里是180在纸上画一下就明白了
        else
            at = 180 - fabs(at);    
    }
//执行旋转动作
    s->runAction( CCRotateTo::create(1, at) );
}