刚接触到cocos2d-x3.2版本，发现3.x与2.x版本有很大差别，看下面一段代码

auto closeItem = MenuItemImage::create(
                                           "CloseNormal.png","CloseSelected.png",CC_CALLBACK_1(HelloWorld::menuCloseCallback,this));

我们在这里改一下：

auto closeItem = MenuItemImage::create(
                                           "CloseNormal.png",[](Object *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
	   });