用了coco2dx引擎也有段时间了，但是总感觉不是很好用，为了写一个功能，往往要写好几行代码，就比如做一个场景切换特效，就要这么写

@H_301_3@auto scene@H_404_4@=HelloWorld::create();//创建待切换的场景 auto transition@H_404_4@=TransitionFade::create(1.0f,scene);//给场景增加特效 Director::getInstance()@H_404_4@->replaceScene(transition);//运用导演类来进行切换场景

简单的一个功能，却要写三行代码，而且很多地方需要用到场景切换，每次使用就要至少写三行，还要做添加不同场景对应头文件之类的事，真的好麻烦。
作为一个讲究效率（其实是嫌麻烦）的程序员，肯定想尽可能的避免这类麻烦的事发生。如果能进一步封装一下这三行代码，直接一个函数就实现场景切换特效该多好，于是乎，一个场景工厂管理类就诞生了，这可以大大的提高我的开发效率（你说这人怎么这么懒呢）。
不多说了，上代码。
首先是SceneFactory.h

@H_301_3@#ifndef __SceneFactory_h__ #define __SceneFactory_h__ #include "cocos2d.h" //scene headers #include "GameScene.h" #include "LoginScene.h" #include "IntroScene.h" USING_NS_CC; //场景类型，根据自己的项目场景修改和添加 enum kSceneType { kSceneGame = 1,kSceneChallenge,kSceneIntro,kSceneLogin }; //场景切换效果类型 enum kTranslateType { kNone,//没有任何效果 kCrossFade,//淡出当前场景的同时淡入下一个场景 kFade,//淡出当前场景到指定颜色，默认颜色为c3b(0,0)，可用最后一个参数指定颜色 kFadeBL,//从左下角开始淡出场景 kFadeDown,//从底部开始淡出场景 kFadeTR,//从右上角开始淡出场景 kFadeUp,//从顶部开始淡出场景 kFlipAngularLeftOver,//当前场景倾斜后翻转成下一个场景，默认从左边开始翻转 kFlipAngularRightOver,//当前场景倾斜后翻转成下一个场景，默认从左边开始翻转 //LeftOver,//从左边开始 //RightOver,//从右边开始 //UpOver,//从顶部开始 //DownOver,//从底部开始 //kFlipX,//水平翻转，默认从左往右翻转，可用的附加参数同上 kFlipXLeftOver,kFlipXRightOver,kFlipXUpOver,kFlipXDownOver,//kFlipY,//垂直翻转，默认从上往下翻转，可用的附加参数同上 kFlipYLeftOver,kFlipYRightOver,kFlipYUpOver,kFlipYDownOver,kZoomFlipAngularLeftOver,//倾斜翻转的同时放大，可用的附加参数同上 kZoomFlipAngularRightOver,//倾斜翻转的同时放大，可用的附加参数同上 //kZoomFlipX,//水平翻转的同时放大，可用的附加参数同上 kZoomFlipXLeftOver,kZoomFlipXRightOver,kZoomFlipXUpOver,kZoomFlipXDownOver,//kZoomFlipY,//垂直翻转的同时放大，可用的附加参数同上 kZoomFlipYLeftOver,kZoomFlipYRightOver,kZoomFlipYUpOver,kZoomFlipYDownOver,kJumpZoom,//跳跃放大切换场景 kMoveInB,//新场景从底部进入，直接覆盖现有场景 kMoveInL,//新场景从左侧进入，直接覆盖现有场景 kMoveInR,//新场景从右侧进入，直接覆盖现有场景 kMoveInT,//新场景从顶部进入，直接覆盖现有场景 kPageTurnTure,//翻页效果，如果指定附加参数为,//true，则表示从左侧往右翻页 kPageTurnFalse,//true，则表示从左侧往右翻页 kRotoZoom,//旋转放大切换场景 kShrinkGrow,//收缩交叉切换场景 kSlideInB,//新场景从底部进入，现有场景同时从顶部退出 kSlideInL,//新场景从左侧进入，现有场景同时从右侧退出 kSlideInR,//新场景从右侧进入，现有场景同时从左侧退出 kSlideInT,//新场景从顶部进入，现有场景同时从底部退出 kSplitCols,//分成多列切换入新场景 kSplitRows,//分成多行切换入新场景，类似百叶窗 kTurnOffTiles//当前场景分成多个块，逐渐替换为新场景 }; class SceneFactory { public: SceneFactory(); ~SceneFactory(); //新建一个场景 static Scene* create(kSceneType type); //新建一个带参数的场景 static Scene* create(kSceneType type,int level); //场景切换（场景类型，场景切换类型，切换所需时间） static void changeScene(kSceneType type,kTranslateType transType,float t); //场景切换（场景类型，带自定义参数的场景，场景切换类型，切换所需时间） static void changeScene(kSceneType type,int level,float t); static TransitionScene* createTransition(kTranslateType transType,Scene* s,float t); private: }; #endif // SceneFactory_h__

然后是其对应的SceneFactory.cpp

@H_301_3@#include "SceneFactory.h" Scene* SceneFactory::create(kSceneType type) { Scene* scene = nullptr; //该工厂根据场景的类型创造出相对应的场景 switch (type) { case kSceneGame: scene = GameScene::create(); break; case kSceneChallenge: break; case kSceneIntro: scene = IntroScene::create(); break; case kSceneLogin: scene = LoginScene::create(); break; default: break; } return scene; } Scene* SceneFactory::create(kSceneType type,int level) { Scene* scene = nullptr; switch (type) { case kSceneGame: scene = GameScene::create(level); break; default: break; } return scene; } TransitionScene* SceneFactory::createTransition(kTranslateType transType,float t) { TransitionScene* scene = nullptr; //根据场景的转换类型，生产出不同的带特效的转换场景 //这些场景转换特效我是从cpp-test里的场景转换的例子里抄过来的，如果有缺少，请按照格式自行添加。 switch (transType) { case kNone: scene = TransitionScene::create(t,s); break; case kCrossFade: scene = TransitionCrossFade::create(t,s); break; case kFade: scene = TransitionFade::create(t,s); break; case kFadeBL: scene = TransitionFadeBL::create(t,s); break; case kFadeDown: scene = TransitionFadeDown::create(t,s); break; case kFadeTR: scene = TransitionFadeTR::create(t,s); break; case kFadeUp: scene = TransitionFadeUp::create(t,s); break; case kFlipAngularLeftOver: scene = TransitionFlipAngular::create(t,s,TransitionScene::Orientation::LEFT_OVER); break; case kFlipAngularRightOver: scene = TransitionFlipAngular::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kFlipXLeftOver: scene = TransitionFlipX::create(t,TransitionScene::Orientation::LEFT_OVER); break; case kFlipXRightOver: scene = TransitionFlipX::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kFlipXUpOver: scene = TransitionFlipX::create(t,TransitionScene::Orientation::UP_OVER); break; case kFlipXDownOver: scene = TransitionFlipX::create(t,TransitionScene::Orientation::DOWN_OVER); break; case kFlipYLeftOver: scene = TransitionFlipY::create(t,TransitionScene::Orientation::LEFT_OVER); break; case kFlipYRightOver: scene = TransitionFlipY::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kFlipYUpOver: scene = TransitionFlipY::create(t,TransitionScene::Orientation::UP_OVER); break; case kFlipYDownOver: scene = TransitionFlipY::create(t,TransitionScene::Orientation::DOWN_OVER); break; case kZoomFlipAngularLeftOver: scene = TransitionZoomFlipAngular::create(t,TransitionScene::Orientation::LEFT_OVER); break; case kZoomFlipAngularRightOver: scene = TransitionZoomFlipAngular::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kZoomFlipXLeftOver: scene = TransitionZoomFlipX::create(t,TransitionScene::Orientation::LEFT_OVER); break; case kZoomFlipXRightOver: scene = TransitionZoomFlipX::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kZoomFlipXUpOver: scene = TransitionZoomFlipX::create(t,TransitionScene::Orientation::UP_OVER); break; case kZoomFlipXDownOver: scene = TransitionZoomFlipX::create(t,TransitionScene::Orientation::DOWN_OVER); break; case kZoomFlipYLeftOver: scene = TransitionZoomFlipY::create(t,TransitionScene::Orientation::LEFT_OVER); break; case kZoomFlipYRightOver: scene = TransitionZoomFlipY::create(t,TransitionScene::Orientation::RIGHT_OVER); break; case kZoomFlipYUpOver: scene = TransitionZoomFlipY::create(t,TransitionScene::Orientation::UP_OVER); break; case kZoomFlipYDownOver: scene = TransitionZoomFlipY::create(t,TransitionScene::Orientation::DOWN_OVER); break; case kJumpZoom: scene = TransitionJumpZoom::create(t,s); break; case kMoveInB: scene = TransitionMoveInB::create(t,s); break; case kMoveInL: scene = TransitionMoveInL::create(t,s); break; case kMoveInR: scene = TransitionMoveInR::create(t,s); break; case kMoveInT: scene = TransitionMoveInT::create(t,s); break; case kPageTurnTure: scene = TransitionPageTurn::create(t,true); break; case kPageTurnFalse: scene = TransitionPageTurn::create(t,false); break; case kRotoZoom: scene = TransitionRotoZoom::create(t,s); break; case kShrinkGrow: scene = TransitionShrinkGrow::create(t,s); break; case kSlideInB: scene = TransitionSlideInB::create(t,s); break; case kSlideInL: scene = TransitionSlideInL::create(t,s); break; case kSlideInR: scene = TransitionSlideInR::create(t,s); break; case kSlideInT: scene = TransitionSlideInT::create(t,s); break; case kSplitCols: scene = TransitionSplitCols::create(t,s); break; case kSplitRows: scene = TransitionSplitRows::create(t,s); break; case kTurnOffTiles: scene = TransitionTurnOffTiles::create(t,s); break; default: break; } return scene; } void SceneFactory::changeScene(kSceneType type,float t) { auto scene = SceneFactory::create(type); auto transcene = SceneFactory::createTransition(transType,scene,t); //若当前有正在运行的场景，切换成该新场景，否则运行该新场景 if (Director::getInstance()->getRunningScene()) { if (transType == kNone) { Director::getInstance()->replaceScene(scene); } else { Director::getInstance()->replaceScene(transcene); } } else { Director::getInstance()->runWithScene(scene); } } void SceneFactory::changeScene(kSceneType type,int level,float t) { auto scene = SceneFactory::create(type,level); auto transcene = SceneFactory::createTransition(transType,t); if (Director::getInstance()->getRunningScene()) { Director::getInstance()->replaceScene(transcene); } else { Director::getInstance()->runWithScene(scene); } } SceneFactory::SceneFactory() { } SceneFactory::~SceneFactory() { }

好啦，以上就是所有代码（好多好多场景切换特效，写的有点累，不过为了以后能偷懒，我忍），那怎么使用呢？很简单。

@H_301_3@SceneFactory::changeScene(kTypeGame,kFade,0.3f);

只要这么一行代码，就通过Fade(其实我也不知道是什么特效)的方式切换到你的GameScene了。当然头文件还是免不了的，但是你不用担心用哪个场景的头文件了，因为你只要用SceneFactory.h就可以了。

@H_301_3@#define SceneFactory SF

（其实你可以更懒的）。