android cocos2d 触屏事件

来源：互联网发布：淘宝买港版苹果手机编辑：程序博客网时间：2024/06/05 04:44

现在的移动设备都是可触摸设备，对于触屏操作也是最理所当然或者常见的，然而我们需要通过对触屏事件进行注册，然而事件的注册，只需要我们重写几个虚函数即可做到

函数声明如下：在我们需要进行触屏事件的Scene类当中进行

    virtual    void registerWithTouchDispatcher();    virtual  bool ccTouchBegan(CCTouch*touch,CCEvent*event);    virtual   void ccTouchMoved(CCTouch*touch,CCEvent*event);    virtual    void ccTouchEnded(CCTouch*touch,CCEvent*event);    virtual   void ccTouchCancelled(CCTouch*touch,CCEvent*event);   // virtual void onEnter();    virtual void onExit();    bool containsTouchLocation(cocos2d::CCTouch *touch);    bool isControl;

我们可以这样认为

void CGameScene::registerWithTouchDispatcher() {//注册触摸事件CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, true);}bool CGameScene::ccTouchBegan(CCTouch*touch, CCEvent*event) {if (containsTouchLocation(touch)) {isControl = true;//CCMessageBox("we got !!", "dsad");return true;}else{//CCMessageBox("we got nothing", "dsade1");}return false;}void CGameScene::ccTouchMoved(CCTouch*touch, CCEvent*event) {if (isControl) {CCPoint touchPoint=convertTouchToNodeSpace(touch);m_hinstance->setPosition(touchPoint);}}void CGameScene::ccTouchEnded(CCTouch*touch, CCEvent*event) {isControl = false;}void CGameScene::ccTouchCancelled(CCTouch*touch, CCEvent*event) {isControl = false;}/*void CGameScene::onEnter(){CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, true);setTouchEnabled(true);}*/void CGameScene::onExit(){CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);}bool CGameScene::containsTouchLocation(cocos2d::CCTouch *touch){CCPoint touchPoint=convertTouchToNodeSpace(touch);    return m_hinstance->boundingBox().containsPoint(touchPoint);}

通过上述代码便能进行触摸检测，同时使得目标跟着手进行移动。

这里我要说的有一点，onEnter和registerWithTouchDispatcher两个函数，onEnter函数则是进行自动注册。而我们通过手动调用registerWithTouchDispatcher函数进行手动注册，这两个函数的函数体是一样的，只是区别在于手动和自动。

另外一点则是，进行Sprite的触摸检测

CCPoint touchPoint=convertTouchToNodeSpace(touch);return m_hinstance->boundingBox().containsPoint(touchPoint);

这样就可以进行触摸之后的检测了。

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