如何在已经创建表格之后的表格上添加与表格中的行相同的行？

Question

在我的应用中，我输入一个vlaue并说值设置了表的行数。在功能中，我将在此处发布与设置TableWidget相关的所有工作。我想要的是，以后使用相同的方法在以后添加新行。意思是，如果我输入“ 3”并生成了3行，如果我也输入新值，我希望能够添加更多行。在我的UI中，我有一个输入值的旋转框，此值基本上是我想要的行数。然后，我单击一个按钮，然后调用此功能。这部分还可以。

    void Pressurator::NozzleCount()
{
int nozzleCount = 0;
 int index = 0;
 nozzleCount = TabUI.nozzlesNum_SB->value();
 if(TabUI.tableWidget->rowCount() == 0){
     index = 0;
     TabUI.tableWidget->setRowCount(nozzleCount);
     qDebug()<<"NozzleCount: "<<nozzleCount<<"| Total Rows: "<<TabUI.tableWidget->rowCount();
 }else if(TabUI.tableWidget->rowCount() > 0){
     TabUI.tableWidget->setRowCount(TabUI.tableWidget->rowCount() + nozzleCount);
     index = TabUI.tableWidget->rowCount() - nozzleCount;
     qDebug()<<"NozzleCount: "<<nozzleCount<<"| Total Rows: "<<TabUI.tableWidget->rowCount();
     qDebug()<<"Index starts at: "<<index;
 }
 qDebug()<<"CHECK 1";


 for(int i=0; i<TabUI.tableWidget->rowCount(); i++){
     for(int j=0; j<TabUI.tableWidget->columnCount(); j++){
  TabUI.tableWidget->setItem(i,j, new QTableWidgetItem);
     }
 }
 qDebug()<<"CHECK 2";

 QLineEdit *lineEdit = new QLineEdit(parent);
        // Set validator
 QIntValidator *validator = new QIntValidator(0, 9, lineEdit);
        lineEdit->setValidator(validator);
 QStringList labels = {"Diameter(in)","Area(in²)","Type","Q(gpm)","DP(psi)"};
 TabUI.tableWidget->setHorizontalHeaderLabels(labels);

// QHeaderView* header = TabUI.tableWidget->horizontalHeader();
// header->setSectionResizeMode(QHeaderView::Stretch);

 qDebug()<<"CHECK 3";

 for(int i=0 ; i< nozzleCount; i++)
 {
// QDoubleSpinBox * ND_SB = new QDoubleSpinBox;
// QDoubleSpinBox * NA_SB = new QDoubleSpinBox;
 QComboBox * nozzleType = new QComboBox;


// ND_SB->setDecimals(5);ND_SB->setRange(0,500);
// NA_SB->setDecimals(5);NA_SB->setRange(0,500);
 nozzleType->addItems(nozzleTypesList);


// TabUI.tableWidget->setCellWidget(i,0, ND_SB);
// TabUI.tableWidget->setCellWidget(i,1, NA_SB);
 TabUI.tableWidget->setCellWidget(i,2, nozzleType);
 qDebug()<<"CHECK 4";

 }
 qDebug()<<"CHECK 5";



 QObject::connect(TabUI.tableWidget, &QTableWidget::itemChanged, this, &Pressurator::CalculateDiameterORArea);

 qDebug()<<"CHECK 6";


}

“检查＃是我用来追踪我发生的问题的调试消息。每当我尝试在生成表的初始值之后输入新值时，我的应用在第一个循环中崩溃。我尝试插入一个声明该表是否为＆gt；如果这样，任何新值都会转化为表末端添加的新行。

Answer 1

尝试一下

    void Pressurator::NozzleCount()
            {
             int nozzleCount = 0;
             nozzleCount = TabUI.nozzlesNum_SB->value();
            
            
             qDebug()<<"CHECK 1";
            
            
             
             qDebug()<<"CHECK 2";
            
             QLineEdit *lineEdit = new QLineEdit(parent);
                    // Set validator
             QIntValidator *validator = new QIntValidator(0, 9, lineEdit);
                    lineEdit->setValidator(validator);
             QStringList labels = {"Diameter(in)","Area(in²)","Type","Q(gpm)","DP(psi)"};
             TabUI.tableWidget->setHorizontalHeaderLabels(labels);
            
            // QHeaderView* header = TabUI.tableWidget->horizontalHeader();
            // header->setSectionResizeMode(QHeaderView::Stretch);
            
             qDebug()<<"CHECK 3";
            
             for(int i=0 ; i< nozzleCount; i++)
             {
             TabUI.tableWidget->insertRow(TabUI.tableWidget->rowCount());
for(int j = 0 ; j < TabUI.tableWidget->columnCount();++j)
              TabUI.tableWidget->setItem(TabUI.tableWidget->rowCount() - 1,j, new QTableWidgetItem(""));
            // QDoubleSpinBox * ND_SB = new QDoubleSpinBox;
            // QDoubleSpinBox * NA_SB = new QDoubleSpinBox;
             QComboBox * nozzleType = new QComboBox;
            
            
            // ND_SB->setDecimals(5);ND_SB->setRange(0,500);
            // NA_SB->setDecimals(5);NA_SB->setRange(0,500);
             nozzleType->addItems(nozzleTypesList);
            
            
            // TabUI.tableWidget->setCellWidget(i,0, ND_SB);
            // TabUI.tableWidget->setCellWidget(i,1, NA_SB);
             TabUI.tableWidget->setCellWidget(i,2, nozzleType);
             qDebug()<<"CHECK 4";
            
             }
             qDebug()<<"CHECK 5";