cocos2d-x学习记录3——CCTouch触摸响应

游戏不同于影音，强交互性是其一大特色，在游戏中主要体现为接受用户的输入并响应。智能手机触摸是其重要的输入方式。

在cocos2d-x中，触摸分为单点触摸和多点触摸。

单点触摸：主要继承CCTargetedTouchDelegate 实现。

多点触摸：主要继承CCStandardTouchDelegate实现。

MyScene.h

 #ifndef MyScene_H_H

 #define MyScene_H_H

 #include "cocos2d.h"

 using namespace cocos2d;

 class MyScene : public CCLayer

 {

 public:

     static CCScene* createScene();

     virtual bool init();

     CREATE_FUNC( MyScene );

     virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);

     virtual void ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent);

     virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);

     virtual void ccTouchCancelled(CCTouch *pTouch, CCEvent *pEvent);

     virtual void registerWithTouchDispatcher();

 private:

 };

 #endif

MyScene.cpp

 #include "MyScene.h"

 CCScene* MyScene::createScene()

 {

     CCScene *scene = CCScene::create();

     MyScene *layer = MyScene::create();

     scene->addChild(layer);

     return scene;

 };

 bool MyScene::init()

 {

     if( !CCLayer::init() ){

         return false;

     }

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

     CCSprite *sprite = CCSprite::create("pal4.png");

     sprite->setAnchorPoint( ccp(0.5, 0.5) );

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

     sprite->setPosition( ccp(size.width/, size.height/) );

     sprite->setScale(0.5f);

     sprite->setTag();

     addChild(sprite);

     setTouchEnabled(true);

     return true;

 }

 bool MyScene::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)

 {

     CCPoint point = pTouch->getLocationInView();

     point = CCDirector::sharedDirector()->convertToGL(point);

     CCNode *node = getChildByTag();

     float x = node->getPositionX();

     float y = node->getPositionY();

     float width = node->getContentSize().width*node->getScale();

     float height = node->getContentSize().height*node->getScale();

     //CCRect rect = CCRectMake(node->getPositionX()-node->getContentSize().width/2, node->getPositionY()-node->getContentSize().height/2,

     //                        node->getContentSize().width, node->getContentSize().height);

     CCRect rect = CCRectMake(x-width/, y-height/, width, height);

     //CCLog("Touch start! %.1f,%.1f", point.x, point.y);

     //CCMessageBox("start","info");

     //return true;

     if( rect.containsPoint(point) ){

         CCLog("Touch start! %.1f,%.1f", point.x, point.y);

         return true;

     }

     return false;

 }

 void MyScene::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent)

 {

     CCPoint point = pTouch->getLocation();

     CCLog("Touch moved! %.1f,%.1f", point.x, point.y);

 }

 void MyScene::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent)

 {

     CCPoint point = pTouch->getLocation();

     CCLog("Touch ended! %.1f, %.1f", point.x, point.y);

 }

 void MyScene::ccTouchCancelled(CCTouch *pTouch, CCEvent *pEvent)

 {

     CCPoint point = pTouch->getLocation();

     CCLog("Touch canceled! %.1f, %.1f", point.x, point.y);

 }

 void MyScene::registerWithTouchDispatcher()

 {

     CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, , true);

 }

运行结果：

在TouchStart中，判断按下的点是否在图片显示区域内。如果在，则打出log，并返回true，然后CCTouchMove、CCTouchEnded等事件才会被响应；否则，不会响应。

Touches标准型。多点触摸时，会将所有的触摸点放进一个CCSet中。

 void MyScene::registerWithTouchDispatcher()

 {

     //CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, true);

     CCLayer::registerWithTouchDispatcher();

 }

 void MyScene::ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent)

 {

     if( pTouches->count() ==  ){

         CCTouch *touch = (CCTouch*)(*( pTouches->begin() ));

         CCPoint point = touch->getLocationInView();

         point = CCDirector::sharedDirector()->convertToGL(point);

         CCNode *node = getChildByTag();

         float x = node->getPositionX();

         float y = node->getPositionY();

         float width = node->getContentSize().width*node->getScale();

         float height = node->getContentSize().height*node->getScale();

         CCRect rect = CCRectMake(x-width/, y-height/, width, height);

         //CCLog("Touches start! %.1f,%.1f", point.x, point.y);

         if( rect.containsPoint(point) ){

             CCLog("Touches start! %.1f,%.1f", point.x, point.y);

         }

     }

     //return false;

 }

 void MyScene::ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent)

 {

     if( pTouches->count() ==  ){

         CCTouch *touch = (CCTouch*)(*( pTouches->begin() ));

         CCPoint point = touch->getLocationInView();

         CCLog("Touches moved! %.1f,%.1f", point.x, point.y);

     }

 }

 void MyScene::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent)

 {

     if( pTouches->count() ==  ){

         CCTouch *touch = (CCTouch*)(*( pTouches->begin() ));

         CCPoint point = touch->getLocationInView();

         CCLog("Touches ended! %.1f,%.1f", point.x, point.y);

     }

 }

 void MyScene::ccTouchesCancelled(CCSet *pTouches, CCEvent *pEvent)

 {

     if( pTouches->count() ==  ){

         CCTouch *touch = (CCTouch*)(*( pTouches->begin() ));

         CCPoint point = touch->getLocationInView();

         CCLog("Touches canceled! %.1f,%.1f", point.x, point.y);

     }

 }

和标准CCTouch基本相同，只是在注册时，调用一次CCLayer的触摸注册函数即可。

运行结果：

巴特西

cocos2d-x学习记录3——CCTouch触摸响应

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