TestCpp 阅读笔记

    CCScene * pScene = CCScene::create();
    CCLayer * pLayer = new TestController();
    pLayer->autorelease();

    pScene->addChild(pLayer);
    pDirector->runWithScene(pScene);

首先创建一个场景和一个TestController层，把TestController层加入到场景中然后运行该场景

class TestController : public CCLayer
{
public:
    TestController();
    ~TestController();

    void menuCallback(CCObject * pSender);
    void closeCallback(CCObject * pSender);

    virtual void ccTouchesBegan(CCSet *pTouches, CCEvent *pEvent);
    virtual void ccTouchesMoved(CCSet *pTouches, CCEvent *pEvent);
private:
    CCPoint m_tBeginPos;
    CCMenu* m_pItemMenu;
};

在这之前定义了一些枚举变量和一些字符串变量记录测试demo

enum
{
    TEST_ACTIONS = 0,
    TEST_TRANSITIONS,
    TEST_PROGRESS_ACTIONS,
    TEST_EFFECTS,
    TEST_CLICK_AND_MOVE,
    TEST_ROTATE_WORLD,
    TEST_PARTICLE,
    TEST_EASE_ACTIONS,
    TEST_MOTION_STREAK,
    TEST_DRAW_PRIMITIVES,
    TEST_COCOSNODE,
}
const std::string g_aTestNames[TESTS_COUNT] = {
    "ActionsTest",
    "TransitionsTest",
    "ActionsProgressTest",
    "EffectsTest",
    "ClickAndMoveTest",
    "RotateWorldTest",
    "ParticleTest",
    "ActionsEaseTest",
    "MotionStreakTest",
    "DrawPrimitivesTest",
    "NodeTest",
}

接着定义一些资源文件的相对目录名

static const char s_pPathGrossini[]       = "Images/grossini.png";
static const char s_pPathSister1[]        = "Images/grossinis_sister1.png";
static const char s_pPathSister2[]        = "Images/grossinis_sister2.png";
static const char s_pPathB1[]             = "Images/b1.png";
static const char s_pPathB2[]             = "Images/b2.png";

接着来看TestController的构造函数

    // add close menu
    CCMenuItemImage *pCloseItem = CCMenuItemImage::create(s_pPathClose, s_pPathClose, this, menu_selector(TestController::closeCallback) );
    CCMenu* pMenu =CCMenu::create(pCloseItem, NULL);
    pMenu->setPosition( CCPointZero );
    pCloseItem->setPosition(ccp( VisibleRect::right().x - 30, VisibleRect::top().y - 30));
    addChild(pMenu, 1);

这里创建了一个关闭按钮的菜单，和一个回调函数TestController::closeCallback用来响应菜单点击事件

	// add menu items for tests
    m_pItemMenu = CCMenu::create();
    for (int i = 0; i < TESTS_COUNT; ++i)
    {
        CCLabelTTF* label = CCLabelTTF::create(g_aTestNames[i].c_str(), "Arial", 24);     
        CCMenuItemLabel* pMenuItem = CCMenuItemLabel::create(label, this, menu_selector(TestController::menuCallback));
        m_pItemMenu->addChild(pMenuItem, i + 10000);
        pMenuItem->setPosition( ccp( VisibleRect::center().x, (VisibleRect::top().y - (i + 1) * LINE_SPACE) ));
    }
    m_pItemMenu->setContentSize(CCSizeMake(VisibleRect::getVisibleRect().size.width, (TESTS_COUNT + 1) * (LINE_SPACE)));
    m_pItemMenu->setPosition(s_tCurPos);
    addChild(m_pItemMenu);

这里创建测试项目的菜单文字并对每一个项目添加对应的响应函数TestController::menuCallback
setTouchEnabled(true); 这里设置允许触屏响应事件
关闭菜单的响应函数主要处理如下
CCDirector::sharedDirector()->end();

    //get the userdata, its the index of the menu item clicked
    CCMenuItem* pMenuItem = (CCMenuItem *)(pSender);
    int nIdx = pMenuItem->getZOrder() - 10000;
    // create the test scene and run it
    TestScene* pScene = CreateTestScene(nIdx);
    if (pScene)
    {
        pScene->runThisTest();
        pScene->release();
    }

获取对应菜单按钮的索引值，然后创建对应的场景数据并运行测试demo。

static TestScene* CreateTestScene(int nIdx)
{
    CCDirector::sharedDirector()->purgeCachedData();
    TestScene* pScene = NULL;
    switch (nIdx)
    {
    case TEST_ACTIONS:
        pScene = new ActionsTestScene(); break;
    case TEST_TRANSITIONS:
        pScene = new TransitionsTestScene(); break;
     case TEST_PROGRESS_ACTIONS:
         pScene = new ProgressActionsTestScene(); break;
    case TEST_EFFECTS:
        pScene = new EffectTestScene(); break;
    default:
        break;
    }
    return pScene;
}

根据给定的索引值创建场景，在此之前清空上一个场景的cache数据。

class ActionsTestScene : public TestScene
{
public:
    virtual void runThisTest();
};

创建ActionsTestScene场景。

class TestScene : public CCScene
{
public: 
    TestScene(bool bPortrait = false);
    virtual void onEnter();
    virtual void runThisTest() = 0;

    // The CallBack for back to the main menu scene
    virtual void MainMenuCallback(CCObject* pSender);
};

测试场景的demo底层基类。

void TestScene::onEnter()
{
    CCScene::onEnter();
    //add the menu item for back to main menu
    CCLabelTTF* label = CCLabelTTF::create("MainMenu", "Arial", 20);
    CCMenuItemLabel* pMenuItem = CCMenuItemLabel::create(label, this, menu_selector(TestScene::MainMenuCallback));
    CCMenu* pMenu =CCMenu::create(pMenuItem, NULL);
    pMenu->setPosition( CCPointZero );
    pMenuItem->setPosition( ccp( VisibleRect::right().x - 50, VisibleRect::bottom().y + 25) );

    addChild(pMenu, 1);
}

在测试场景中创建菜单用于返回主场景。

void TestScene::MainMenuCallback(CCObject* pSender)
{
    CCScene* pScene = CCScene::create();
    CCLayer* pLayer = new TestController();
    pLayer->autorelease();

    pScene->addChild(pLayer);
    CCDirector::sharedDirector()->replaceScene(pScene);
}

这里重新创建场景和TestController层，并用该场景替换之前的场景。

// 定义菜单回调的函数指针
typedef CCLayer* (*NEWTESTFUNC)();

-- className定义创建层的宏，返回静态CCLayer的指针

#define TESTLAYER_CREATE_FUNC(className) \
static CCLayer* create##className() \
{ return new className(); }

-- 创建className函数名

#define CF(className) create##className