编辑QTableModel中的数据后未更改

我继承了如上所述的QAbstractTableModel here 。我已将setData编码为:

bool TableModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if(role == Qt::EditRole)
    {
        Data[index.row()][index.column()]= value.toString();
        qDebug()<<Data[index.row()][index.column()];//to check entered data passed or not
    }
    return true;
}

Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{
    return Qt::ItemIsEditable|Qt::ItemIsEnabled|Qt::ItemIsSelectable;
}

在主窗口中,我将模型和视图连接为:

connect(model,SIGNAL(dataChanged(QModelIndex,QModelIndex)),ui->tableView,SLOT(dataChanged(QModelIndex,QModelIndex)));

但是在编辑之后,在视图中不更新数据。我尝试从setData函数发出dataChanged信号,但它不起作用。我在代码中遗漏了什么?

数据功能:

QVariant TableModel::data(const QModelIndex &index, int role) const
{

    switch(role)
    {
    case Qt::DisplayRole:
        if(index.column()==0)
        {
        return index.row()+1;
        }
        break;
    case Qt::DecorationRole:

        if(index.column()==1)
        {
            QColor c;
            c.setRgb(0,200,200,200);
            return c;
        }
        break;

    case Qt::ToolTipRole:
        if(index.column()==2)
        {
        return "colum 3";
        }
        break;
    case Qt::StatusTipRole:
        return "Not editable";
        break;

    case Qt::FontRole:
    {
        QFont f;
        f.setFamily("Times");
        f.setBold(true);
        f.setKerning(true);
        return f;
    }
        break;
    case Qt::TextAlignmentRole:
    {
        return Qt::AlignCenter;
    }
        break;

    case Qt::BackgroundRole:
        if(index.column()==2)
        {
            QColor b;
            b.setRgb(100,100,250,200);
        return b;
        }
        break;

    case Qt::ForegroundRole:
    {
        QColor b;
        b.setRgb(0,100,250,200);
        return b;
    }

    case Qt::CheckStateRole:
        if(index.column()==3)
        {
            if(index.row()==1) return true;
            return false;
        }
        break;

    case Qt::InitialSortOrderRole:
        return Qt::AscendingOrder;// use not clear
    }

    return QVariant();
}