关于cocos2dx3.0 UITextField不能使用退格键删除字符的解决方案

if(GLFW_KEY_DELETE == key)  
{  
    IMEDispatcher::sharedDispatcher()->dispatchDeleteBackward();  
}

static void keyEventCallback(EventKeyboard::KeyCode code, Event *event)
{
	typedef EventKeyboard::KeyCode KeyCode;
	switch(code)
	{
	case KeyCode::KEY_BACKSPACE:
#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32
		IMEDispatcher::sharedDispatcher()->dispatchDeleteBackward();
#else
		Director::getInstance()->end();
#endif
		break;
	case KeyCode::KEY_DELETE:
		IMEDispatcher::sharedDispatcher()->dispatchDeleteBackward();
		break;
	}
}

EventListenerKeyboard *listener = EventListenerKeyboard::create();
listener->onKeyReleased = keyEventCallback;
director->getEventDispatcher()->addEventListenerWithFixedPriority(listener, 1);