How to refer to labels created in a for loop?

BigBen

Hi.

I am creating multiple instances of labels in a for loop, and displaying them.

I want to ask, how can I refer to a particular label I create in the loop? Because I don't know their object name. How can I work with a specific label if I want to?

Christian Ehrlicher

Store them in a container or let Qt collect them with QObject::findChild()

BigBen

@Christian-Ehrlicher
Thanks for your answer. I wanted to request an example of storing the labels in a container or collecting them in findChild().

Thank you.

Christian Ehrlicher

@BigBen said in How to refer to labels created in a for loop?:

I wanted to request an example of storing the labels in a container or collecting them in findChild().

Why? This is basic c++ stuff which you should know. for findChild() there is even an example in the link I gave you...

Kent-Dorfman

QLabel* label_one = new QLabel("label", parent);

Viola! you have a handle to your label.

JonB

@BigBen

Store them in a container yourself as you create them:

QList<QLabel *> labels;
for (int i = 0; i < 10; i++)
{
    QLabel *label = new QLabel;
    someLayout->addWidget(label);
    labels.append(label);
}

Assign them an objectName for future reference to recall an individual one:

QList<QLabel *> labels;
for (int i = 0; i < 10; i++)
{
    QLabel *label = new QLabel;
    label->setObjectName(QString("label_%1").arg(i));
    someLayout->addWidget(label);
}
QLabel *label_2 = someParentWidget->findChild<QLabel *>("label_2");

Collect them all via findChildren():

QList<QLabel *> labels = someParentWidget->findChildren<QLabel *>();