How to pass parameter in MenuItem selector

cocos2d-x C++
#1

I want to pass parameter(int) while calling jumpScene function in cocos2d-x

CCMenuItem *menuItem1 = CCMenuItemFont::itemFromString(“PlayGame”,this, menu_selector(MainMenuScene::jumpScene));

How to pass parameter?

thank you

#2

You can not pass a parameter in MenuItem selector.
What do you want to do?
May be you can use other way to resolve it.

#3

I what to use jumpScene functin pass parameter(id) in order to jump different scenes.

#4

I think you can do it like this:

void MainMenuScene::menuCallback(CCObject * pSender)
{
    CCMenuItem* pMenuItem = (CCMenuItem *)(pSender);
    int tag = (int)pMenuItem->getTag();

    switch (tag)
    {
        // do different things for different tags
    }
}

So you can change menu items’s tag to jump different scenes.

#5

Thanks, Minggo!

I’m not sure if it worked for that intangible guy, but it worked for me.

#6

Hi Minggo,

Using getTag() did not work for me. I was getting arbitrary values from it. What worked for me was getUserData() . I am using version 2.0-x-2.0.4
Thanks for the suggestion though.

#7

you should set the tag of your menu item after you create it

//ex
menuItem1.setTag(10);

then you can get its tag

#8

If you want to just know which menu item was activated, then use setTag/getTag, but if you want to actually pass some extra data from the code that creates the menu to the callback method then you can use setUserData/getUserData. Most of the time you probably just want to know which menu item was called and then setting and testing the tag should suffice.

const int kTagPlaygame = 1;
const int kTagOptions = 2;

CCMenuItem *menuItem1 = CCMenuItemFont::itemFromString("Play Game",this, menu_selector(MainMenuScene::jumpScene));
menuItem1->setTag(kTagPlaygame);
CCMenuItem *menuItem2 = CCMenuItemFont::itemFromString("Options",this, menu_selector(MainMenuScene::jumpScene));
menuItem2->setTag(kTagOptions);
// add each item to menu and to the scene

void MainMenuScene::menuCallback(CCObject * pSender)
{
    CCMenuItem* pMenuItem = (CCMenuItem *)(pSender);
    int tag = (int)pMenuItem->getTag();

    switch (tag)
    {
        case kTagPlaygame:
             // replace scene with GameScene
        case kTagOptions:
             // replace scene with OptionsScene
        default:
             // log error w/tag
    }
}
#9

CCMenuItemSprite *playButton = CCMenuItemSprite::create(GButton::buttonWithText(), NULL, this, menu_selector(Menu::playGame));

i face error. undefine refrences GButton::buttonWithText().
help me thanks

#10

Remove the () in the GButtonWithText()