Cocos2dx 中的CCCallFunc,CCCallFuncN,CCCallFuncND,CCCallFuncO比较

首先看一张图片，表示了CCCallFunc的继承关系：

1、CCCallFunc，回调，调用不带参数的函数：

[cpp]

CCSequence::actions(CCCallFunc::actionWithTarget(this,callfunc_selector(ExtendActionLayer::onCallBack1)));

void ExtendActionLayer::onCallBack1()

{

flight->runAction(CCTintBy::actionWithDuration(0.5f,255));

}

2、CCCallFuncO，回调，O表示CCObject，CCCallFunco可以带CCObject参数的函数

[cpp]

CCSequence::actions(CCCallFuncO::actionWithTarget(this,callfuncO_selector(ExtendActionLayer::onCallBack2),CCInteger::create(2));

void ExtendActionLayer::onCallBack2(CCObject* data)

{

CCInteger* num = dynamic_cast<CCInteger*>(data);

pSender->runAction(CCTintBy::actionWithDuration(num->getValue(),255));

}

3、CCCallFuncN，回调，N表示CCNode，表示可以传递Node*类型

[cpp]

CCSequence::actions(CCCallFuncN::actionWithTarget(this,callfuncN_selector(ExtendActionLayer::onCallBack3)));

void ExtendActionLayer::onCallBack3(CCNode* pSender)

{

// 在这个例子里，pSender就是flight，因为是他执行了那个actionF

pSender->runAction(CCTintBy::actionWithDuration(1.0f,255));

}

4、CCCallFuncND，回调，ND表示CCNode和Data，可以传递对象本身和一个void*类型参数，void*表示可以是任意类型的参数

[cpp]

CCSequence::actions(CCCallFuncND::actionWithTarget(this,callfuncND_selector(ExtendActionLayer::onCallBack4),(void *)2));

void ExtendActionLayer::onCallBack4(CCNode* pSender,void* pData)

{

pSender->runAction(CCTintBy::actionWithDuration(static_cast<float>((int)pData),255));

}