Cocos2d-x學習筆記（19）（TestCpp源碼分析-3）

本章主要介紹testBasic.h/cpp，這兩個檔案主要用於返回主情境介面。

//testBasic.h#ifndef _TEST_BASIC_H_#define _TEST_BASIC_H_#include "cocos2d.h"#include "VisibleRect.h"USING_NS_CC;using namespace std;class TestScene : public CCScene  //繼承自CCScene{public:     TestScene(bool bPortrait = false);  //建構函式    virtual void onEnter();  //重寫onEnter函數    virtual void runThisTest() = 0;  //重寫runThisTest函數    // The CallBack for back to the main menu scene    virtual void MainMenuCallback(CCObject* pSender);  //返回主菜單函數};typedef CCLayer* (*NEWTESTFUNC)();  //NEWTESTFUNC表示一個傳回型別為CCLayer*，沒有參數的函數指標#define TESTLAYER_CREATE_FUNC(className) \  //TESTLAYER_CREATE_FUNC表示一個建立CCLayer的宏函數static CCLayer* create##className() \  //用兩個##來在宏中替換className為宏定義的參數{ return new className(); }#define CF(className) create##className  //CF表示 createXXX；比如CF（Scene）表示：createScene#endif

以下是testBasic.cpp檔案介紹

//testBasic.cpp#include "testBasic.h"#include "controller.h"TestScene::TestScene(bool bPortrait)  //建構函式{        CCScene::init();  //調用基類的初始化函數}void TestScene::onEnter(){    CCScene::onEnter();  //調用基類的onEnter函數    //add the menu item for back to main menu//#if (CC_TARGET_PLATFORM == CC_PLATFORM_MARMALADE)//    CCLabelBMFont* label = CCLabelBMFont::create("MainMenu",  "fonts/arial16.fnt");//#else    CCLabelTTF* label = CCLabelTTF::create("MainMenu", "Arial", 20);//#endif  //將label與返回函數MainMenuCallback相關聯    CCMenuItemLabel* pMenuItem = CCMenuItemLabel::create(label, this, menu_selector(TestScene::MainMenuCallback));    CCMenu* pMenu =CCMenu::create(pMenuItem, NULL);  ///用pMenuItem初始化CCMenu對象    pMenu->setPosition( CCPointZero );  //設定pMenu位置    pMenuItem->setPosition( ccp( VisibleRect::right().x - 50, VisibleRect::bottom().y + 25) ); //設定返回按鍵位置    addChild(pMenu, 1);}void TestScene::MainMenuCallback(CCObject* pSender)  //返回主菜單函數{    CCScene* pScene = CCScene::create();  //建立新情境    CCLayer* pLayer = new TestController();  //建立TestController層    pLayer->autorelease();    pScene->addChild(pLayer);  //將新層加入到新情境    CCDirector::sharedDirector()->replaceScene(pScene);  //切換情境}