Cocos2d-x中实现弹出对话框示例

/*对话框场景类的头文件*/#ifndef _POP_SCENE_H_#define _POP_SCENE_H_#include "cocos2d.h"using namespace cocos2d;class PopScene : public CCLayer{public:	static CCScene * scene();	bool init();	CREATE_FUNC(PopScene);private:	//注册触摸事件，实现ccTouchBegan()方法	void registerWithTouchDispatcher();	bool ccTouchBegan(CCTouch * touch,CCEvent * pevent);	//在弹出的对话框上加俩个按钮，以下的函数是对应的按钮的处理事件	void yesButton(CCObject * object);	void noButton(CCObject * object);	//设置对话框的title	void setTitle();	//设置对话框的文本内容	void setContent();	//m_size代表的是对话框背景的大小	CCSize m_size;	//对话框的背景精灵	CCSprite * m_bgSprite;};#endif

/*对话框场景类的具体实现*/#include "PopScene.h"CCScene * PopScene::scene(){	CCScene * scene = NULL;	do	{		scene = CCScene::create();		PopScene * layer = PopScene::create();		scene->addChild(layer);	}	while(0);	return scene;}bool PopScene::init(){	bool bRet = false;	do	{		CC_BREAK_IF(!CCLayer::init());		CCSize winSize = CCDirector::sharedDirector()->getWinSize();		//设置这个层的背景图片，并且设置其位置为整个屏幕的中点		CCSprite * background = CCSprite::create("background.png");		m_bgSprite = background;		background->setPosition(ccp(winSize.width/2,winSize.height/2));		this->addChild(background);		//获得背景图片的大小		CCSize contentSize = background->getContentSize();		m_size = contentSize;		//添加俩个菜单在这个层中		CCMenuItemImage * item1 = CCMenuItemImage::create("btn-play-normal.png",			"btn-play-selected.png","",			this,menu_selector(PopScene::yesButton));		CCMenuItemImage * item2 = CCMenuItemImage::create("btn-highscores-normal.png",			"btn-highscores-selected.png","",			this,menu_selector(PopScene::noButton));		CCMenu * menu = CCMenu::create(item1,item2,NULL);		menu->alignItemsHorizontallyWithPadding(5);		menu->setPosition(ccp(contentSize.width/2,contentSize.height/3));		//kCCMenuHandlerPriority的值为-128，代表的是菜单按钮的触摸优先级		//设置menu优先级，这里设置为普通menu的二倍减一，原因看下边		menu->setTouchPriority(kCCMenuHandlerPriority*2-1);		background->addChild(menu);		//设置题目和文本内容		this->setTitle();		this->setContent();		this->setTouchEnabled(true);		bRet = true;	}	while(0);	return bRet;}void PopScene::registerWithTouchDispatcher(){	//kCCMenuHandlerPriority=-128，将这个值设置为-128的二倍，可以比下边的层的优先级高	//而且ccTouchBegan的返回值为true，说明其他的层将接受不到这个触摸消息了，只有这个层上边的	//菜单的优先级比他还要打，所以它上边的菜单是可以接收到触摸消息的	CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this,		kCCMenuHandlerPriority*2,true);}bool PopScene::ccTouchBegan(CCTouch * touch,CCEvent * pevent){	return true;}//点击菜单按钮的时候调用的事件处理函数void PopScene::yesButton(CCObject * object){	this->removeFromParentAndCleanup(true);}void PopScene::noButton(CCObject * object){	this->removeFromParentAndCleanup(true);}//设置这个层的题目void PopScene::setTitle(){	//CCLabelTTF * title = CCLabelTTF::create("Tips","",24);	CCLabelBMFont * title = CCLabelBMFont::create("Tips","bitmapFontChinese.fnt");	title->setPosition(ccp(m_size.width/2,m_size.height-title->getContentSize().height/2));	m_bgSprite->addChild(title);}//设置层的内容void PopScene::setContent(){	CCLabelTTF * content = CCLabelTTF::create("hello! everyone,welcome to www.VeVB.COm",		"",24);	content->setPosition(ccp(m_size.width/2,m_size.height/2));	//设置ttf的文本域	content->setDimensions(CCSize(this->m_size.width-60,this->m_size.height-100));	//设置ttf的水平对齐方式  content->setHorizontalAlignment(kCCTextAlignmentLeft);	m_bgSprite->addChild(content);}

//helloworld中按钮的回调函数void HelloWorld::menuCloseCallback(CCObject* pSender){	PopScene* popLayer = PopScene::create();	this->addChild(popLayer);}