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HomeDatabaseMysql Tutorialcocos2d-x中CCNode的init和onEnter

CCNode的init()方法和onEnter()方法: 一、调用顺序 显示FirstScene时: FirstLayer::init FirstLayer::onEnter(init方法之后会调用此方法,如果使用了CCTransitionScene,将会在过渡效果开始以后调用此方法) FirstLayer::onEnterTransitionDidFinish(在使

CCNode的init()方法和onEnter()方法:


一、调用顺序
显示FirstScene时:


FirstLayer::init
FirstLayer::onEnter(init方法之后会调用此方法,如果使用了CCTransitionScene,将会在过渡效果开始以后调用此方法)
FirstLayer::onEnterTransitionDidFinish(在使用了CCTransitionScene,会在过渡效果结束以后调用此方法


由FirstScene切换到OtherScene时:


OtherLayer::init

FirstLayer::onExitTransitionDidFinish(在使用CCTransitionScene时,将会在过渡效果开始以后调用此方法)

FirstLayer::onExit(在dealloc方法之前会调用这个方法,如果调用了CCTransitionScene,将会在过渡效果结束以后调用此方法)
FirstLayer::dealloc
OtherLayer::onEnter
OtherLayer::onEnterTransitionDidFinish


二、调用情况


1.调用的顺序先init(),后onEnter()。


2.init()在类的对象被创建使调用一次且仅此一次。


3.onEnter在该类被载入场景的时候被调用,可能会发生多次。


4.CCLayer* pLayer = new CExampleLayer();
这种情况下,只调用onEnter。


5.CCLayer* pLayer = CExampleLayer::create();

这样情况下,先调用init,再调用onEnter。


函数onEnterTransitionDidFinish和onExitTransitionDidStart是否被调用,取决于是否使用了场景切换特效CCTransitionScene。而onEnter和onExit则必然会在场景切换过程中的摸个时间点被调用。还要注意,在使用onEnter和onExit函数时,必须要调用父类中相同的方法避免丢失用户触碰信息以及内存泄露问题。

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