cocos2d创建带有背景颜色的layer

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这次笔者创建了一个带有背景颜色的layer，同时生成了一个Sprite和一个CCLabelTTf，字体显示在Sprite的中心所在。

代码如下：

GameScene.h

#ifndef __GAMASCENE__H#define __GAMASCENE__H#include "cocos2d.h"class CGameScene : public cocos2d::CCLayerColor{public:    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone    virtual bool init();    // there's no 'id' in cpp, so we recommend returning the class instance pointer    static cocos2d::CCScene* scene();    // a selector callback   // void menuCloseCallback(CCObject* pSender);    // implement the "static node()" method manually    CREATE_FUNC(CGameScene);};#endif // __HELLOWORLD_SCENE_H__

GameScene.cpp文件内容如下：

#include "GameScene.h"#include "AppMacros.h"USING_NS_CC;CCScene* CGameScene::scene() {// 'scene' is an autorelease objectCCScene *scene = CCScene::create();// 'layer' is an autorelease objectCGameScene *layer = CGameScene::create();//默示获得视口(可视区域)的大小CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();//表示可视区域的起点坐标,这在处理相对位置的时候非常有用,确保节点在不同分辨率下的位置一致CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();//将该层设置为屏幕大小layer->setContentSize(CCSize(visibleSize.width,visibleSize.height));//将该层的起点设置为屏幕原点layer->setPosition(origin.x,origin.y);// add layer as a child to scenescene->addChild(layer);// return the scenereturn scene;}bool CGameScene::init() { if (!CCLayerColor::initWithColor(ccc4(0xff, 0xff, 0xff, 0xff), 200, 200)) { return false; }CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize(); //默示获得视口(可视区域)的大小CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin(); //表示可视区域的起点坐标,这在处理相对位置的时候非常有用,确保节点在不同分辨率下的位置一致for (int i = 0; i < 20; i++) {CCSprite* pSprite = ::CCSprite::create("qiu1.png");pSprite->setScale(0.25); //缩放为原来的1/2pSprite->setPosition(ccp(visibleSize.width / 2 + origin.x+i*60,visibleSize.height / 2 + origin.y)); //确保该图在屏幕中心CCLabelTTF*pLabel = CCLabelTTF::create("4", "Arial", TITLE_FONT_SIZE);CCSize pSize = pSprite->getContentSize();CCPoint pPoint = pSprite->getPosition();pLabel->setScale(4);pLabel->setPosition(ccp(pSize.width / 2, pSize.height / 2)); //如果想要子节点在父节点的中心，则只是需要获得父节点的尺寸，子节点的位置是父节点的中心即可int a = pSprite->getZOrder();pLabel->setZOrder(a + 1);//设置颜色为粉红pLabel->setColor(ccc3(255,192,203));pSprite->addChild(pLabel);this->addChild(pSprite, 0);}return true;}

这样就完成了一个背景层颜色设置。以及两个父子关系的CCNode的相对位置确定

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