cocos2d-x的菜单

Cocos2d-x
#1

我在图层中加了个菜单，但是为什么一点击屏幕，程序就退出呢？
把this->addChild(pMenu,1);注释掉，就正常了，
添加一个空的菜单也会退出，这是为什么呢？

代码如下：

CCMenuItemImage *pVoiceItem = CCMenuItemImage::itemFromNormalImage(
IMAGE_HP_VOICE_OFF_NORMAL,
IMAGE_HP_VOICE_OFF_SELECTED,
this,
menu_selector(HomePage::switchVoice) );
pVoiceItem->setPosition( Common::changeToWindowsPo(RECT_HP_VOICE.origin) );

// create menu, it's an autorelease object
CCMenu* pMenu = CCMenu::menuWithItems(pVoiceItem, NULL);
pMenu->setPosition( CCPointZero );
this->addChild(pMenu,1);