cocos2d-x笔记 ccTouchesBegan、ccTouchesMoved、ccTouchesEnded-白红宇

cocos2d-x笔记 ccTouchesBegan、ccTouchesMoved、ccTouchesEnded

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发布时间：2019-06-28

本文共 3836 字，大约阅读时间需要 12 分钟。

#ifndef __MUTITOUCHTEST_H__#define __MUTITOUCHTEST_H__#include "../testBasic.h"class MutiTouchTestLayer : public CCLayer{public:    bool init();    virtual void registerWithTouchDispatcher(void);    virtual void ccTouchesBegan(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);    virtual void ccTouchesMoved(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);    virtual void ccTouchesEnded(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);    virtual void ccTouchesCancelled(cocos2d::CCSet *pTouches, cocos2d::CCEvent *pEvent);    CREATE_FUNC(MutiTouchTestLayer)};class MutiTouchTestScene : public TestScene{ public:  virtual void runThisTest();};#endif /* __MUTITOUCHTEST_H__ */

//定义颜色数组static ccColor3B s_TouchColors[CC_MAX_TOUCHES] = {    ccYELLOW,    ccBLUE,    ccGREEN,    ccRED,    ccMAGENTA};

//定义点类class TouchPoint : public CCNode{public:    TouchPoint()    {        setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor));    }    virtual void draw()    {        ccDrawColor4B(m_TouchColor.r, m_TouchColor.g, m_TouchColor.b, 255);        glLineWidth(10);        ccDrawLine( ccp(0, m_pTouchPoint.y), ccp(getContentSize().width, m_pTouchPoint.y) );        ccDrawLine( ccp(m_pTouchPoint.x, 0), ccp(m_pTouchPoint.x, getContentSize().height) );        glLineWidth(1);        ccPointSize(30);        ccDrawPoint(m_pTouchPoint);    }    void setTouchPos(const CCPoint& pt)    {        m_pTouchPoint = pt;    }    void setTouchColor(ccColor3B color)    {        m_TouchColor = color;    }    static TouchPoint* touchPointWithParent(CCNode* pParent)    {        TouchPoint* pRet = new TouchPoint();        pRet->setContentSize(pParent->getContentSize());        pRet->setAnchorPoint(ccp(0.0f, 0.0f));        pRet->autorelease();        return pRet;    }private:    CCPoint m_pTouchPoint;    ccColor3B m_TouchColor;};

//开启多点触控bool MutiTouchTestLayer::init(){    if (CCLayer::init())    {        setTouchEnabled(true);        return true;    }    return false;}//定义字典，用于管理点集static CCDictionary s_dic;

//注册标准触摸事件void MutiTouchTestLayer::registerWithTouchDispatcher(void){    CCDirector::sharedDirector()->getTouchDispatcher()->addStandardDelegate(this, 0);}

void MutiTouchTestLayer::ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent){    CCSetIterator iter = pTouches->begin();    for (; iter != pTouches->end(); iter++)    {        CCTouch* pTouch = (CCTouch*)(*iter);        TouchPoint* pTouchPoint = TouchPoint::touchPointWithParent(this);        CCPoint location = pTouch->getLocation();        pTouchPoint->setTouchPos(location);        pTouchPoint->setTouchColor(s_TouchColors[pTouch->getID()]);        addChild(pTouchPoint);//将点对象及其id加到字典中        s_dic.setObject(pTouchPoint, pTouch->getID());    }    }

void MutiTouchTestLayer::ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent){    CCSetIterator iter = pTouches->begin();    for (; iter != pTouches->end(); iter++)    {        CCTouch* pTouch = (CCTouch*)(*iter);//通过id从字典中找出相应的点对象        TouchPoint* pTP = (TouchPoint*)s_dic.objectForKey(pTouch->getID());        CCPoint location = pTouch->getLocation();//然后赋值进去        pTP->setTouchPos(location);    }}

//清除点集void MutiTouchTestLayer::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent){    CCSetIterator iter = pTouches->begin();    for (; iter != pTouches->end(); iter++)    {        CCTouch* pTouch = (CCTouch*)(*iter);        TouchPoint* pTP = (TouchPoint*)s_dic.objectForKey(pTouch->getID());        removeChild(pTP, true);        s_dic.removeObjectForKey(pTouch->getID());    }}

//结束void MutiTouchTestLayer::ccTouchesCancelled(CCSet *pTouches, CCEvent *pEvent){    ccTouchesEnded(pTouches, pEvent);}void MutiTouchTestScene::runThisTest(){    MutiTouchTestLayer* pLayer = MutiTouchTestLayer::create();    addChild(pLayer, 0);    CCDirector::sharedDirector()->replaceScene(this);}