【cocos2dx】新建helloworld.cpp项目代码分析

来源：互联网发布：三国志11自制武将数据编辑：程序博客网时间：2024/04/29 19:43
#include "HelloWorldScene.h"//命名空间//   #define USING_NS_CC using namespace cocos2dUSING_NS_CC;/************************************************************************//*HelloWorldScene.h 与 HelloWorldScene.cpp这两个文件定义了helloworld项目中的默认场景HelloWorld类继承自CCLayer，因此他本身也是一个层*//************************************************************************/Scene* HelloWorld::createScene(){    // 'scene' is an autorelease object    auto scene = Scene::create();        // 'layer' is an autorelease object    auto layer = HelloWorld::create();    // add layer as a child to scene    scene->addChild(layer);    // return the scene    return scene;}// on "init" you need to initialize your instancebool HelloWorld::init(){/************************************************************************//* init()可以简单的划分为4部分1.调用父类的init方法来进行最初的初始化2.创建关闭程序的菜单并添加到层中3.创建一个文本标签并添加到层中，显示“HelloWorld”4.用“HelloWorld.png”创建一个精灵，并添加到层中*//************************************************************************/    //////////////////////////////    // 1. super init first    if ( !Layer::init() )    {        return false;    }        Size visibleSize = Director::getInstance()->getVisibleSize();    Vec2 origin = Director::getInstance()->getVisibleOrigin();    /////////////////////////////    // 2. add a menu item with "X" image, which is clicked to quit the program    //    you may modify it.    // add a "close" icon to exit the progress. it's an autorelease object    auto closeItem = MenuItemImage::create(                                           "CloseNormal.png",                                           "CloseSelected.png",                                           CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));  //宏定义    closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,                                origin.y + closeItem->getContentSize().height/2));//log test  ==   为啥输出的都是0 ？CCLOG("origin.x==%d , origin.y==%d", origin.x, origin.y);CCLOG("visibleSize.width==%d", visibleSize.width);CCLOG("closeItem->getContentSize().width/2==%d", closeItem->getContentSize().width / 2);CCLOG("closeItem->getCOntentSize().height/2==%d", closeItem->getContentSize().height / 2);    // create menu, it's an autorelease object    auto menu = Menu::create(closeItem, NULL);    menu->setPosition(Vec2::ZERO);    this->addChild(menu, 1);   //我改成50，原来是1     /////////////////////////////    // 3. add your codes below...//ml @2014.11.25   12:06//CCSprite * bird = CCSprite spriteWithFile : @"bird01.png";auto fish = CCSprite::create();CCLOG("retaincount after init:%d", fish->getReferenceCount());     //  1fish->retain();CCLOG("retaincount after retain:%d", fish->getReferenceCount());   //  2fish->release();CCLOG("retainCount after release:%d", fish->getReferenceCount());   //  2//fish->autorelease();  //此处和上面的release()不能同时出现，否则会出现断点CCLOG("retainCount after autorelease:%d", fish->getReferenceCount());   //  2//很有趣，若把fish->release();注释掉，下面的那个不注释，则结果是1，2，1，1    // add a label shows "Hello World"    // create and initialize a label// TTF（TrueTypeFont）是一种字库名称        auto label = Label::createWithTTF("Hello World", "fonts/Marker Felt.ttf", 24);        // position the label on the center of the screen    label->setPosition(Vec2(origin.x + visibleSize.width/2,                            origin.y + visibleSize.height - label->getContentSize().height));    // add the label as a child to this layer    this->addChild(label, 1);    // add "HelloWorld" splash screen"    auto sprite = Sprite::create("HelloWorld.png");    // position the sprite on the center of the screen    sprite->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));    // add the sprite as a child to this layer    this->addChild(sprite, 0);        return true;}void HelloWorld::menuCloseCallback(Ref* pSender){#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");    return;#endif    Director::getInstance()->end();#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)    exit(0);#endif}
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