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, 0, 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, 0, 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, 0, 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, 0, 255));
}