<![CDATA[2D QVector of QLabel]]>Hello,
i have created the following 2D QVector of QLabels and i wanted to set a Pixmap on all of the labels. My goal is to have a 5x5 field filled with Pixmaps.

QVector<QVector<QLabel*>> labels
{
    {0, 0, 0, 0 ,0},
    {0, 0, 0, 0 ,0},
    {0, 0, 0, 0 ,0},
    {0, 0, 0, 0 ,0},
    {0, 0, 0, 0 ,0}
};

The MainWindow code looks like this:

    ui->setupUi(this);
    this->setWindowTitle("Lawnmower");

    for (int i = 0; i < 5; i++)
    {
        for (int j = 0; j < 5; j++)
        {
            labels[i][j]->setPixmap(NotMowed);
            labels[i][j]->setGeometry(labelPosX, labelPosY, 200, 100);
            labelPosX += 172;
            if (i == 0 || i == 1 || i == 2 || i == 3 || i == 4)
            {
                labelPosX = 0;
                labelPosY += 100;
            }
        }
    }

Dont mind the Variables labelPosX and labelPosY i just made them for setting the size and position.
Anyways suddenly when i try to start it i get a segmentation fault. Can anyone help me? Thanks for your response. :)

]]>https://forum.qt.io/topic/139860/2d-qvector-of-qlabelRSS for NodeWed, 29 Apr 2026 00:38:53 GMTFri, 07 Oct 2022 07:32:21 GMT60<![CDATA[Reply to 2D QVector of QLabel on Fri, 07 Oct 2022 07:44:27 GMT]]>Yes thanks for your quick answer!
And yea unfortunately i forgot to initialise the labels, so i added this code:

for (int i = 0; i < 5; i++)
        for (int j = 0; j < 5; j++)
            labels[i][j] = new QLabel(this);

Just in case of other people having the same mistake and not knowing what they did wrong/forgot.

]]>https://forum.qt.io/post/731664https://forum.qt.io/post/731664Fri, 07 Oct 2022 07:44:27 GMT<![CDATA[Reply to 2D QVector of QLabel on Fri, 07 Oct 2022 07:38:20 GMT]]>@Qt-User0307 did you ever initialise the 25 QLabels ? I don't see that anywhere from what you've shown here.

Besides that, use a Debugger

]]>https://forum.qt.io/post/731660https://forum.qt.io/post/731660Fri, 07 Oct 2022 07:38:20 GMT