cocos2dx中的CCCallFunc,CCCallFuncN,CCCallFuncND,CCCallFuncO比較

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首先看一張圖片，表示了CCCallFunc的繼承關係：

1、CCCallFunc，回調，調用不帶參數的函數：

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print?

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

2	void ExtendActionLayer::onCallBack1()

3

{

4	flight->runAction(CCTintBy::actionWithDuration(0.5f, 255, 0, 255));

5

}

2、CCCallFuncO，回調，O表示CCObject，CCCallFunco可以帶CCObject參數的函數

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print?

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

2	void ExtendActionLayer::onCallBack2(CCObject* data)

3

{

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

5	pSender->runAction(CCTintBy::actionWithDuration(num->getValue(), 255, 0, 255));

6

}

3、CCCallFuncN，回調，N表示CCNode，表示可以傳遞Node*類型

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print?

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

2	void ExtendActionLayer::onCallBack3(CCNode* pSender)

3

{

4	// 在這個例子裏，pSender就是flight，因爲是他執行了那個actionF

5	pSender->runAction(CCTintBy::actionWithDuration(1.0f, 255, 0, 255));

6

}

4、CCCallFuncND，回調，ND表示CCNode和Data，可以傳遞對象本身和一個void*類型參數，void*表示可以是任意類型的參數

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print?

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

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

3

{

4	pSender->runAction(CCTintBy::actionWithDuration(static_cast<float>((int)pData), 255, 0, 255));

5

}