cocostudio编辑的场景加载到程序中出错，求大神指点啊

Cocos2d-x
#1
bool HelloWorld::init()
{
if ( !Layer::init() )
{
return false;
}
auto root = SceneReader::getInstance()->createNodeWithSceneFile("MainMenuScene.json");
if(root == nullptr)
{
return false;
}
auto child = root->getChildByTag(10005);
auto reader = (ComRender*)child->getComponent("GUIComponent");
auto layer = (Layer*)reader->getNode();
addChild(layer);
return true;
} 运行后出错，MainMenuScene场景没加载
本人是cocos2dx初学者，求大神解答啊
#2

SceneReader* sr =SceneReader::getInstance();//场景读取

Node* node=sr->createNodeWithSceneFile(“assets/publish/FightScene.json”);

addChild(node,9);