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//創建類的對象，并返回相應類的指針 /*** define a create function for a specific type, such as CCLayer* @__TYPE__ class type to add create(), such as CCLayer*/ #define CREATE_FUNC(__TYPE__) \ static __TYPE__* create() \ { \__TYPE__ *pRet = new __TYPE__(); \if (pRet && pRet->init()) \{ \pRet->autorelease(); \return pRet; \} \else \{ \delete pRet; \pRet = NULL; \return NULL; \} \ } #ifndef _ROTATE_WORLD_TEST_H_ #define _ROTATE_WORLD_TEST_H_#include "../testBasic.h"class RotateWorldTestScene : public TestScene { public:virtual void runThisTest(); };class SpriteLayer : public CCLayer { public:virtual void onEnter();CREATE_FUNC(SpriteLayer) };class TestLayer : public CCLayer { public:virtual void onEnter();CREATE_FUNC(TestLayer) };class RotateWorldMainLayer : public CCLayer { public:virtual void onEnter();CREATE_FUNC(RotateWorldMainLayer) };#endif

init()和onEnter()這倆個方法都是CCNode的方法。其區別如下：

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1.其被調用的順序是先init()，后onEnter()。

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2.init()在類的初始化時只會調用一次。

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3.onEnter在該類被載入場景的時候被調用，可能會發生多次。

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4.CCLayer* cclayer = new MyLayer();

這種情況下，只會觸發onEnter。

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5.CCLayer* cclayer = MyLayer::create();

這樣情況下，既會觸發init()方法，也會觸發onEnter()方法。

#include "RotateWorldTest.h" #include "../testResource.h"//------------------------------------------------------------------ // // TestLayer // //------------------------------------------------------------------ void TestLayer::onEnter() {CCLayer::onEnter();float x,y;CCSize size = CCDirector::sharedDirector()->getWinSize();x = size.width;y = size.height;//CCMutableArray *array = [UIFont familyNames];//for( CCString *s in array )// NSLog( s );CCLabelTTF* label = CCLabelTTF::create("cocos2d", "Tahoma", 64);label->setPosition( ccp(x/2,y/2) );addChild(label); }//------------------------------------------------------------------ // // SpriteLayer // //------------------------------------------------------------------ void SpriteLayer::onEnter() {CCLayer::onEnter();float x,y;CCSize size = CCDirector::sharedDirector()->getWinSize();x = size.width;y = size.height;CCSprite* sprite = CCSprite::create(s_pPathGrossini);CCSprite* spriteSister1 = CCSprite::create(s_pPathSister1);CCSprite* spriteSister2 = CCSprite::create(s_pPathSister2);sprite->setScale(1.5f);spriteSister1->setScale(1.5f);spriteSister2->setScale(1.5f);sprite->setPosition(ccp(x/2,y/2));spriteSister1->setPosition(ccp(40,y/2));spriteSister2->setPosition(ccp(x-40,y/2));CCAction *rot = CCRotateBy::create(16, -3600);addChild(sprite);addChild(spriteSister1);addChild(spriteSister2);sprite->runAction(rot);CCActionInterval *jump1 = CCJumpBy::create(4, ccp(-400,0), 100, 4);CCActionInterval *jump2 = jump1->reverse();CCActionInterval *rot1 = CCRotateBy::create(4, 360*2);CCActionInterval *rot2 = rot1->reverse();spriteSister1->runAction(CCRepeat::create( CCSequence::create(jump2, jump1, NULL), 5 ));spriteSister2->runAction(CCRepeat::create( CCSequence::create((CCFiniteTimeAction *)(jump1->copy()->autorelease()), (CCFiniteTimeAction *)(jump2->copy()->autorelease()), NULL), 5 ));spriteSister1->runAction(CCRepeat::create( CCSequence::create(rot1, rot2, NULL), 5 ));spriteSister2->runAction(CCRepeat::create( CCSequence::create((CCFiniteTimeAction *)(rot2->copy()->autorelease()), (CCFiniteTimeAction *)(rot1->copy()->autorelease()), NULL), 5 )); }//------------------------------------------------------------------ // // RotateWorldMainLayer // //------------------------------------------------------------------void RotateWorldMainLayer::onEnter() {CCLayer::onEnter();float x,y;CCSize size = CCDirector::sharedDirector()->getWinSize();x = size.width;y = size.height;//創建4個顏色不一樣的層CCNode* blue = CCLayerColor::create(ccc4(0,0,255,255));CCNode* red = CCLayerColor::create(ccc4(255,0,0,255));CCNode* green = CCLayerColor::create(ccc4(0,255,0,255));CCNode* white = CCLayerColor::create(ccc4(255,255,255,255));//將另一個層加到該層中blue->setScale(0.5f);blue->setPosition(ccp(-x/4,-y/4));blue->addChild( SpriteLayer::create() );red->setScale(0.5f);red->setPosition(ccp(x/4,-y/4));green->setScale(0.5f);green->setPosition(ccp(-x/4,y/4));green->addChild(TestLayer::create());white->setScale(0.5f);white->setPosition(ccp(x/4,y/4));white->ignoreAnchorPointForPosition(false);white->setPosition(ccp(x/4*3,y/4*3));addChild(blue, -1);addChild(white);addChild(green);addChild(red);CCAction* rot = CCRotateBy::create(8, 720);//對4個層做動作blue->runAction(rot);red->runAction((CCAction *)(rot->copy()->autorelease()));green->runAction((CCAction *)(rot->copy()->autorelease()) );white->runAction((CCAction *)(rot->copy()->autorelease()) ); }void RotateWorldTestScene::runThisTest() {CCLayer* pLayer = RotateWorldMainLayer::create();addChild(pLayer);runAction( CCRotateBy::create(4, -360) );CCDirector::sharedDirector()->replaceScene(this);}

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