QT batch operation control and set signal slot

Preface

qt In many cases, you need to perform batch operations on controls , And want to operate the container separately . If you create a control with code , You cannot get the object name of the control alone , If in ui Drag in the file to create a control , You cannot batch operate . I looked up some information on the Internet , It feels very cumbersome , So I tried to write it myself , There are two main ideas

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Situation 1 、 Code creation control , Batch operation and separate operation of controls , And set signal slot

Ideas ： Use QVector Template class , Add control to container

The code is as follows ：

	// Create a container 
    QVector<QPushButton *> btnList;
    for (int i=0; i<6; i++) {
    
        // Add a button for code creation 
        btnList.push_back(new QPushButton(this));
    }

    // Batch operations on containers 
    for (int i=0; i<btnList.size(); i++) {
    
        btnList[i]->setText(QString(" Button  %1").arg(i+1));
        btnList[i]->move(100,(i+1)*50);
        // Set signal slot 
        connect(btnList[i],&QPushButton::clicked,this,[=](){
    
            QMessageBox::about(this," Tips ",QString(" This is the button  %1").arg(i+1));
        });
    }

You can use QVector Containers , You can also use QList list , The use method is roughly the same . When setting the signal slot , We can also easily get the serial number of the button , Then let it jump to a specific slot .

The effect is as follows ：

but ui The controls in the file can also be manipulated in this way , But if ui When there are too many buttons in the file , Adding one by one is also troublesome , Let's look at situation 2

Situation two 、ui Create control in file , Batch operation and separate operation of controls , And set signal slot

Ideas ： Get the internal button control through the parent control , Store these spaces in QList perhaps QVector in , Control again

    // obtain widget All buttons in 
	QList<QPushButton *> btnsList = ui->widget->findChildren<QPushButton *>();

	// Batch operations on containers 
    for (int i = 0; i<btnsList.size(); i++)
    {
    
        btnsList[i]->setText(QString(" This is the button  %1").arg(i+1));
        // Set signal slot 
        connect(btnsList[i],&QPushButton::clicked,this,[=](){
    
            QMessageBox::about(this," Tips ",btnsList[i]->text());
        });
    }

Be careful ： The order of buttons in the list is recursive , The current order of speculation is , From left to right , From top to bottom , The name of the button on the left is the order I created . This needs special attention

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