Child already added

cocos2d-x C++
#1

Hello everyone.
I am using the barebones “new Project”, where I simply changed code in HellowWorldScene to include a tilemap. The init() looks like this:

bool HelloWorldScene::init() {
    if ( !Scene::init()) return false;

    auto tileMap = TMXTiledMap::create("tilemaps/tilemapHD.tmx");
    auto background = tileMap->getLayer("background");

    this->addChild(background, -1);
    background->setAnchorPoint(Point(0.5,0.5));

    return true;
}

However, running this code yields the following assertion error:

Assert failed: child already added. It can't be added again

I am really confused now, as this is really the only thing I’ve changed. Building as a release works without problem, but I can’t run the Debug build this way.
Is there anything I oversee in the sense that cocos “somehow” adds the background if you create the tilemap?

Thank you very much!

#2

This is not necessary as TIleLayer is part of TileMap.
You can hide/show Layer with setVisible, not need to add manually.

2 Likes
#3

Hello,
I wrote the code according to a cocos tutorial online. Apparently not a good one :wink:
Your code works without problems! I still do not really understand why adding the background directly would result in this error…
But I’ll take it as it is :+1:

Thank you very much.

#4

What tutorial did you follow so we can take a look

#5

While browsing back to the tutorial I noticed that I misread the code they used.
I am sorry, this was my fault.

#6

What tutorial did you use so we can take a look?