cocos2dx学习笔记(1)

#include "HelloWorldScene.h"

USING_NS_CC;

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 scenereturn scene;
}

// on "init" you need to initialize your instancebool HelloWorld::init()
{
    //////////////////////////////
// 1. super init firstif ( !Layer::init() )
    {
        returnfalse;
    }
    
    Size visibleSize = Director::getInstance()->getVisibleSize();

    Point 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));
    
    closeItem->setPosition(Point(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
                                origin.y + closeItem->getContentSize().height/2));

    // create menu, it‘s an autorelease object
    auto menu = Menu::create(closeItem, NULL);
    menu->setPosition(Point::ZERO);
    this->addChild(menu, 1);

    /////////////////////////////// 3. add your codes below...

    // add a label shows "Hello World"
    // create and initialize a label    
    auto label = LabelTTF::create("Hello World", "Arial", 24);
    
    // position the label on the center of the screen
    label->setPosition(Point(origin.x + visibleSize.width/2,
                            origin.y + visibleSize.height - label->getContentSize().height));

    // add the label as a child to this layerthis->addChild(label, 1);

     //add "HelloWorld" splash screen"
    auto sprite = Sprite::create("HelloWorld.png");

    // position the sprite on the center of the screen
    sprite->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));


    // add the sprite as a child to this layerthis->addChild(sprite, 0);
    
    returntrue;
}


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
}

    Size spriteSzie = sprite->getContentSize();
    float scaleX = spriteSzie.width/visibleSize.width;
    float scaleY = spriteSzie.height/visibleSize.height;
    //log("scaleX = %f, scaleY = %f",scaleX,scaleY);
    sprite->setScale(1/scaleX, 1/scaleY);

            //
                ccscaleto   作用：创建一个缩放的动作

            //
                参数1：达到缩放大小所需的时间

            //
                参数2 ：缩放的比例


            //
            CCAnimation* animation = CCAnimation::create();
CCActionInterval* scaleto = CCScaleTo::create(2,2);
sprite->runAction(scaleto);