Error on "mainMenu::createScene()"

cocos2d-x C++
#1

I am using a script called “MainMenuScene.cpp” and the game is supposed to switch to the scene from “IntroScene.cpp.” I am using

auto menu = MainMenu::createScene();
Director::getInstance()->replaceScene(TransitionFade::create(15, menu, Color3B(0,0,0)));

but it is giving an error that I don’t really understand, it says “Undefined Symbol: mainMenu::createScene();”
I do not understand how this is here, because in “MainMenuScene.h,” it is creating MainMenuScene.cpp

#2

It means that signature is not found.

Show us your header and source

#3

what do you mean header and source

#4

your .h and your .cpp

#5

IntroScene.cpp:

#include "IntroScene.h"
#include <AudioEngine.h>
#include "MainMenuScene.h"

USING_NS_CC;

Scene* Intro::createScene()
{
    return Intro::create();
}

static void problemLoading(const char* filename)
{
    printf("Error while loading: %s\n", filename);
    printf("Depending on how you compiled you might have to add 'Resources/' in front of filenames in IntroScene.cpp\n");
}

bool Intro::init()
{
    if ( !Scene::init() )
    {
        return false;
    }
    
    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
    // Create "mainMenu" scene
    
    // Initialize spritesheets
    auto spritecache = SpriteFrameCache::getInstance();
    spritecache->addSpriteFramesWithFile("GameSheet03-uhd.plist");
    spritecache->addSpriteFramesWithFile("LaunchSheet-uhd.plist");
    
    // Intro - Title
    auto logo_title = Sprite::createWithSpriteFrameName("logo_001.png");
    auto logo_title_rescale = ScaleTo::create(1, 0.4f,0.4f);
    auto logo_title_move = MoveTo::create(1, Vec2(visibleSize.width / 2,visibleSize.height / 2));
    auto logo_title_intro_rescale_ease = EaseIn::create(logo_title_rescale->clone(),2);
    auto logo_title_intro_move_ease = EaseIn::create(logo_title_move->clone(), 2);
    auto logo_title_intro_anim = Spawn::createWithTwoActions(logo_title_intro_rescale_ease,logo_title_intro_move_ease);
    auto delay = DelayTime::create(4);
    auto logo_title_sequence = Sequence::create(logo_title_intro_anim,nullptr);
    logo_title->setPosition(Vec2(visibleSize.width / 2,visibleSize.height * -1));
    this->addChild(logo_title,0);
    
    // Intro - Text
    auto intro_text = Label::createWithBMFont("bigFont-uhd.fnt","Fanmade 2.2");
    intro_text->setPosition(Vec2(visibleSize.width / 2,visibleSize.height * -1));
    intro_text->setColor(Color3B(26,158,3));
    auto intro_text_move = MoveTo::create(0.3f,Vec2(visibleSize.width / 2, visibleSize.height / 2.5f));
    auto intro_transition = CallFunc::create([]() {
        // Main menu
        auto mainMenu = Scene::create();
        Director::getInstance()->replaceScene(TransitionFade::create(15, mainMenu, Color3B(0,0,0)));
        LayerColor *_bgColor = LayerColor::create(Color4B(53,23,200,255));
        mainMenu->addChild(_bgColor,-10);
        auto load = Label::createWithBMFont("bigFont-uhd.fnt","Loading Game...");
        auto visibleSize = Director::getInstance()->getVisibleSize();
        load->setPosition(Vec2(visibleSize.width / 2, visibleSize.height / 2));
        load->setScale(0.2f,0.2f);
        mainMenu->addChild(load);
        auto delay = DelayTime::create(18);
        auto mainmenu_finished_loading = CallFunc::create([]() {
            // Main menu
            auto menu = MainMenu::createScene();
            Director::getInstance()->replaceScene(TransitionFade::create(15, menu, Color3B(0,0,0)));
            /*
             // this is the stuff I moved to MainMenuScene.cpp
            auto mainMenu = Scene::create();
            Director::getInstance()->replaceScene(TransitionFade::create(15, mainMenu, Color3B(0,0,0)));
            LayerColor *_bgColor = LayerColor::create(Color4B(53,23,200,255));
            mainMenu->addChild(_bgColor,-10);
            auto ach = Label::createWithBMFont("bigFont-uhd.fnt","Fanmade!");
            auto visibleSize = Director::getInstance()->getVisibleSize();
            ach->setPosition(Vec2(visibleSize.width / 2, visibleSize.height * 1.05f));
            auto ach_move = MoveTo::create(1,Vec2(visibleSize.width / 2, visibleSize.height / 1.1f));
            auto ach_move_ease = EaseOut::create(ach_move->clone(), 0.5f);
            ach->setScale(0.2f,0.2f);
            auto poweredby = Label::createWithBMFont("Font05-uhd.fnt","Powered By");
            auto cocos2dxlogo = Sprite::createWithSpriteFrameName("cocos2DxLogo.png");
            cocos2dxlogo->setPosition(Vec2(visibleSize.width * 0.17f, visibleSize.height * 0.03f));
            poweredby->setPosition(Vec2(visibleSize.width * 0.052f, visibleSize.height * 0.03f));
            cocos2dxlogo->setScale(0.25f,0.25f);
            poweredby->setScale(0.15f,0.15f);
            mainMenu->addChild(ach);
            mainMenu->addChild(cocos2dxlogo);
            mainMenu->addChild(poweredby);
            auto userdefaults = cocos2d::UserDefault::getInstance();
            Director::getInstance()->replaceScene(mainMenu);
            if(!userdefaults->getBoolForKey("notNew")){
                AudioEngine::play2d("achievement_01.mp3", false, 1.0f, nullptr);
                ach->runAction(ach_move_ease);
            }
            userdefaults->setBoolForKey("notNew", true);
            //sprintf(userdefaults->getIntegerForKey("newUser"));
            AudioEngine::play2d("menuLoop.mp3", true, 1.0f, nullptr);
             */
        });
        auto helperSprite = Sprite::create("tutorial_05.png");
        helperSprite->setScale(0, 0);
        auto helperSpriteSequence = Sequence::create(delay,mainmenu_finished_loading,nullptr);
        mainMenu->addChild(helperSprite);
        helperSprite->runAction(helperSpriteSequence);
    });
    auto intro_text_sequence = Sequence::create(intro_text_move,delay->clone(),intro_transition,nullptr);
    intro_text->setScale(0.25f,0.25f);
    this->addChild(intro_text);
    
    // Animate intro
    logo_title->runAction(logo_title_sequence);
    intro_text->runAction(intro_text_sequence);
    
    return true;
}


void Intro::menuCloseCallback(Ref* pSender)
{
    Director::getInstance()->end();
}

IntroScene.h:

#ifndef __INTRO_SCENE_H__
#define __INTRO_SCENE_H__

#include "cocos2d.h"

class Intro : public cocos2d::Scene
{
public:
    static cocos2d::Scene* createScene();

    virtual bool init();
    
    // a selector callback
    void menuCloseCallback(cocos2d::Ref* pSender);
    
    // implement the "static create()" method manually
    CREATE_FUNC(Intro);
};

#endif // __HELLOWORLD_SCENE_H__

MainMenuScene.cpp:

#include "MainMenuScene.h"
#include <AudioEngine.h>

USING_NS_CC;

Scene* MainMenu::createScene()
{
    return MainMenu::create();
}

static void problemLoading(const char* filename)
{
    printf("Error while loading: %s\n", filename);
    printf("Depending on how you compiled you might have to add 'Resources/' in front of filenames in IntroScene.cpp\n");
}

bool MainMenu::init()
{
    if ( !Scene::init() )
    {
        return false;
    }
    
    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
    // Create "mainMenu" scene
    
    // Initialize spritesheets
    auto spritecache = SpriteFrameCache::getInstance();
    spritecache->addSpriteFramesWithFile("GameSheet03-uhd.plist");
    spritecache->addSpriteFramesWithFile("LaunchSheet-uhd.plist");
    
    auto testSprite = Sprite::createWithSpriteFrameName("playBtn.png");
    this->addChild(testSprite);
    
    return true;
}


void MainMenu::menuCloseCallback(Ref* pSender)
{
    Director::getInstance()->end();
}

MainMenuScene.h:

#ifndef __MAINMENU_SCENE_H__
#define __MAINMENU_SCENE_H__

#include "cocos2d.h"

class MainMenu : public cocos2d::Scene
{
public:
    static cocos2d::Scene* createScene();

    virtual bool init();
    
    // a selector callback
    void menuCloseCallback(cocos2d::Ref* pSender);
    
    // implement the "static create()" method manually
    CREATE_FUNC(MainMenu);
};

#endif // __HELLOWORLD_SCENE_H__
#6

Have you added your source file MainMenuScene.cpp to CMakeLists.txt?

2 Likes
#7

Thank you! I did not know that I had to add the scene scripts to CMakeLists.txt

#8

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