cocos2d-x学习笔记(10)--touchEvent

cocos2d-x学习笔记(9)--effect(特效)
     这次，我们对屏幕触屏事件做一下简单的介绍。
这次我们要讲到三个触屏响应事件函数：
ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent)
ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent)
ccTouchesBegin(CCSet *pTouches, CCEvent *pEvent)

step1:创建cocos2d-win32 application,并命名为touchEvent;
step2:在HelloWorldScene.h中添加MyLayer函数用于测试touch event;
设置常量用于表示人物
const int tagSprite = 1;
[cpp]
class MyLayer:public CCLayerColor
{
public:
    MyLayer();
    virtual void ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent);

};
在HelloWorldScene::scene()做如下修改：
[cpp]
CCScene* HelloWorld::scene()
{
    CCScene * scene = NULL;
    do
    {
        scene = CCScene::node();
        CC_BREAK_IF(! scene);

        MyLayer* layer = new MyLayer();
        CC_BREAK_IF(! layer);
        scene->addChild(layer);
    } while (0);

    return scene;
}

[cpp]
MyLayer::MyLayer()
{
    setIsTouchEnabled(true);//设置是否启用触屏响应

    CCSprite* player = CCSprite::spriteWithFile("player.png");
    addChild(player, 0, tagSprite);

[cpp]
    //此处为player精灵设置一个标记，用于之后的快速获取。
        //设置背景
    CCLayer* layer = CCLayerColor::layerWithColor(ccc4(255,0,0,255));
    addChild(layer, -1);

    player->setPosition(ccp(20, 150));
    player->runAction(CCJumpTo::actionWithDuration(4, ccp(300, 48), 100, 4));
    layer->runAction(CCRepeatForever::actionWithAction((CCActionInterval*)
        (CCSequence::actions(CCFadeIn::actionWithDuration(1), CCFadeOut::actionWithDuration(1), NULL))));
    //设置背景淡进淡出

}

//对多次点击事件的响应
void MyLayer::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent)
{
    CCSetIterator it = pTouches->begin();
    CCTouch* touch = (CCTouch*)(* it);

    CCPoint location = touch->locationInView(touch->view());
    CCPoint convertedLoation = CCDirector::sharedDirector()->convertToGL(location);

    CCNode* node = getChildByTag(tagSprite);
[cpp] view plaincopy
//通过标记快速获取精灵指针
[cpp]
node->stopAllActions();
node->runAction(CCMoveTo::actionWithDuration(1, ccp(convertedLoation.x, convertedLoation.y)));
float x = convertedLoation.x - node->getPosition().x;
float y = convertedLoation.y - node->getPosition().y;
float at = (float) CC_RADIANS_TO_DEGREES(atanf(x / y));

if (y < 0)
{
    if( x < 0)
        at = 180 + fabs(at);
    else
        at = 180 - fabs(at);
}
node->runAction(CCRotateTo::actionWithDuration(1, at));
[cpp]
这里我仅仅只是想大家对触屏事件有个大概的了解。接下来我们讲解三个函数的用法。
step4:添加四个类：
[cpp]
class BaseLayer:public CCLayer
{
public:
    virtual void onEnter();

    void backCallback(CCObject* pSender);
    void restartCallback(CCObject* pSender);
    void nextCallback(CCObject* pSender);
};

class TouchLayer1:public BaseLayer
{
protected:
    CCSprite* m_gun;
public:
    TouchLayer1();
    virtual void ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent);
};

class TouchLayer2:public BaseLayer
{
protected:
    CCSprite* m_gun;
public:
    TouchLayer2();
    virtual void ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent);
};

class TouchLayer3:public BaseLayer
{
protected:
    CCSprite* m_gun;
public:
    TouchLayer3();
    virtual void ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent);
};

和前几次一样定义一些全局变量及函数
static int index = 0;
const int MAX_INDEX = 2;
static std::string touches[] =
{
"ccTouchesEnded",
"ccTouchesMoved",
"ccTouchesBegin"
};
CCLayer* runThisTest(int index)
{
CCLayer* layer = NULL;
switch(index)
{
case 0:
layer = new TouchLayer1();
return layer;
case 1:
layer = new TouchLayer2();
return layer;
case 2:
layer = new TouchLayer3();
return layer;
}
return NULL;
}

CCLayer* runThisTest(int index)
{
CCLayer* layer = NULL;
switch(index)
{
case 0:
layer = new TouchLayer1();
return layer;
case 1:
layer = new TouchLayer2();
return layer;
case 2:
layer = new TouchLayer3();
return layer;
}
return NULL;
}

最后添加成员函数：
[cpp]
void BaseLayer::onEnter()
{
    CCLayer::onEnter();

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

    //添加标题

    CCLabelTTF* label = CCLabelTTF::labelWithString(touches[index].c_str(),"Arial", 28);

    label->setPosition(ccp(size.width/2, size.height-30));

    addChild(label);

    //添加基本按钮
    CCLabelTTF* pNextLabel = CCLabelTTF::labelWithString("Next ", "Arial", 28);
    CCLabelTTF*pBackLabel = CCLabelTTF::labelWithString("Back ", "Arial", 28);
    CCLabelTTF*pRestartLabel = CCLabelTTF::labelWithString("Restart ", "Arial", 28);

    CCMenuItemLabe

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