QtableView内的垃圾值

Question

我有4个QtableViews，包含4行和4列。但是，单元格中填充了垃圾值，只要编辑单元格中的值，应用程序就会终止。 示例代码，

QTableView* const calibrationViews[H20_Num_Ranges]=
                              {calibration_ui->CalibrationView1,
                               calibration_ui->CalibrationView2,
                               calibration_ui->CalibrationView3,
                               calibration_ui->CalibrationView4
                              };


            calibrationViews[i]->resizeColumnToContents(0);
            calibrationViews[i]->resizeColumnToContents(1);
            calibrationViews[i]->horizontalHeader()->setStretchLastSection(true);
            connect(_calibrationModels[i],
                     SIGNAL(dataChanged(QModelIndex,QModelIndex)),
                     this, SLOT(ProcessGUICalibrationChange()));
QModelIndex gainIndex = _calibrationModels[0]->index(0,
                                    H20CalibrationModel::GainColumn);
        newVal = gainIndex.data(Qt::DisplayRole).toString().toFloat(&ok);
        if (!qFuzzyCompare(calibration.probe[0].temperatureAdcGain,
                           newVal))
        {
            calibration.probe[0].temperatureAdcGain= newVal;
            calibrationChanged = true;
        }
        // Offset
        QModelIndex offsetIndex = _calibrationModels[0]->index(0,
                                    H20CalibrationModel::OffsetColumn);
        newVal = offsetIndex.data(Qt::DisplayRole).toString().toFloat(&ok);
        if (!qFuzzyCompare(calibration.probe[0].temperaturAdcOffset,
                           newVal))
        {
            calibration.probe[0].temperaturAdcOffset = newVal;
            calibrationChanged = true;
        }

请帮助