在这里分享记录自己的学习NotificationCenter时候的代码，这里用NotificationManager进行管理使用NotificationCenter。

NotificationManager.cpp

#include "NotificationManager.h"

#include "VisibleRect.h"

#define MSG_SWITCH_STATE "SwitchState"

USING_NS_CC;

enum

{

	kSpriteTag

};

void runManager(){

	auto mSene = Scene::create();

	auto mLayer = NotificationManager::create();

	mSene->addChild(mLayer);

	Director::getInstance()->runWithScene(mSene);

}

bool NotificationManager::init(){

	if (!Layer::init())

	{

		return false;

	}

	auto sp = Sprite::create("Images/t1.png");

	sp->setPosition(VisibleRect::center());

	addChild(sp, 1, kSpriteTag);

	//首先创建一个关闭键

	auto mCloseItem = MenuItemFont::create("Close", CC_CALLBACK_1(NotificationManager::closeManager, this));

	//设置关闭键相对坐标

	mCloseItem->setPosition(VisibleRect::rightBottom().x - mCloseItem->getContentSize().width, VisibleRect::rightBottom().y + mCloseItem->getContentSize().height);

	auto mCloseMenu = Menu::create(mCloseItem, 0);

	//设置Menu从坐标系的(0,0)处開始

	mCloseMenu->setPosition(Vec2::ZERO);

	addChild(mCloseMenu);

	/*创建一个可开关的Menu*/

	auto label1 = LabelTTF::create("switch off", "fonts/Marker Felt.ttf", 26);

	auto label2 = LabelTTF::create("switch on", "fonts/Marker Felt.ttf", 26);

	auto mSwitchItem1 = MenuItemLabel::create(label1);

	auto mSwitchItem2 = MenuItemLabel::create(label2);

	auto mSwitchToggle = MenuItemToggle::createWithCallback(CC_CALLBACK_1(NotificationManager::switchToggle, this), mSwitchItem1, mSwitchItem2, NULL);

	mSwitchToggle->setSelectedIndex(1);  //switch on选中显示

	auto mSwitchMenu = Menu::create(mSwitchToggle, NULL);

	mSwitchMenu->setPosition(Vec2(VisibleRect::bottom().x, VisibleRect::bottom().y + 100));

	addChild(mSwitchMenu);

	setIsConnectToggle(true);  //进行监听

	return true;

}

void NotificationManager::switchToggle(Ref* sender){

	auto obj = (MenuItemToggle*)sender;

	auto sp1 = (Sprite*)getChildByTag(kSpriteTag);

	if (obj->getSelectedIndex()){  //switch on

		sp1->setOpacity(255);      //透明度100%

	}

	else{                         //switch off

		sp1->setOpacity(127);    //半透明

	}

}

void NotificationManager::setIsConnectToggle(bool b){

	if (b){

		NotificationCenter::getInstance()->addObserver(this, callfuncO_selector(NotificationManager::switchToggle), MSG_SWITCH_STATE,NULL);

	}

	else{

		NotificationCenter::getInstance()->removeObserver(this, MSG_SWITCH_STATE);

	}

}

NotificationManager::~NotificationManager(){

	NotificationCenter::getInstance()->removeObserver(this, MSG_SWITCH_STATE);

}

//退出

void NotificationManager::closeManager(Ref *sender){

#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

}

NotificationManager.h

#ifndef NOTIFICATIONMANAGER_H

#define NOTIFICATIONMANAGER_H

#include "cocos2d.h"

class NotificationManager :public cocos2d::Layer

{

public:

	virtual ~NotificationManager();

	virtual bool init();

	void closeManager(cocos2d::Ref *sender);

	void switchToggle(cocos2d::Ref *sender);

	void setIsConnectToggle(bool b);

	CREATE_FUNC(NotificationManager);  //创建一个自己主动释放对象

};

void runManager();

#endif /*NOTIFICATIONMANAGER_H*/