Everybody is good, I use QTableView development program, in a separate test project running well, in a formal application in the engineering running collapse, what reason be excuse me?
In the code data model class code is as follows:

 class FormulaListModel: public QAbstractTableModel 
{
Typedef struct 
{
QString op1_name; 
QString op2_name; 
QString op; 
Bool isEnable; 
} FORMULA, * PFORMULA; 
Q_OBJECT 

Public: 
FormulaListModel (QObject * parent); 
~ FormulaListModel (); 

/* Implement the necessary virtual function of QAbstractListModel */
Int the rowCount (const QModelIndex & amp; The parent=QModelIndex const ()); 
Int columnCount (const QModelIndex & amp; The parent=QModelIndex const ()); 
QVariant data (const QModelIndex & amp; The index, int role=Qt: : DisplayRole) const; 
Private: 
QVector M_lsFormula; 
}; 
FormulaListModel: : FormulaListModel (QObject * parent) 
: QAbstractTableModel (parent) 
{
int i; 
For (I=0; I & lt; 40; I + +) 
{
PFORMULA formula=new formula; 
Formula - & gt; IsEnable=true; 
Formula - & gt; Op="+"; 
Formula - & gt; Op1_name=QString (" % 1 "). Arg (I); 
Formula - & gt; Op2_name=QString (" % 1 "). Arg (50 - I); 
M_lsFormula. Append (formula); 
} 
} 

FormulaListModel: : ~ FormulaListModel () 
{
Foreach (PFORMULA f, m_lsFormula) 
{
If (f) 
{
Delete the f; 
} 
} 
M_lsFormula. The clear (); 
} 
Int FormulaListModel: : rowCount (const QModelIndex & amp; The parent) const 
{
Return m_lsFormula. The count (); 
} 
Int FormulaListModel: : columnCount (const QModelIndex & amp; The parent) const 
{
The return of 4; 
} 
QVariant FormulaListModel: : data (const QModelIndex & amp; Const index, int role) 
{
The switch (role) 
{
Case Qt: : EditRole: 
{
Int r=index. The row (); 
C=int index. The column (); 
PFORMULA pf=m_lsFormula [r]. 
The switch (c) 
{
Case 0: 
Return pf - & gt; IsEnable; 
Case 1: 
Return pf - & gt; Op1_name; 
Case 2: 
Return pf - & gt; The op. 
Case 3: 
Return pf - & gt; Op2_name; 
} 
} 
Case Qt: : DisplayRole: 
{
C=int index. The column (); 
Int r=index. The row (); 
PFORMULA pf=m_lsFormula [r]. 
The QStringList lsStr; 

The switch (c) 
{
Case 0: 
Return "IsUsed"; 
Case 1: 
Case 3: 
LsStr & lt; & lt; "1"; 
LsStr & lt; & lt; "2"; 
Return lsStr; 
Case 2: 
LsStr & lt; & lt; "+". 
LsStr & lt; & lt; "-"; 
Return lsStr; 
} 
} 
Case Qt: : DecorationRole: 
{
QColor CLR (Qt: : transparent); 
Return the CLR. 
} 
Case Qt: : SizeHintRole: 
Return QSize (130, 16); 
Case Qt: : FontRole: 
{
QFont font; 
The font. SetBold (true); 
Return the font; 
} 
Case Qt: : BackgroundRole: 
{
QBrush brush (Qt: : transparent); 
Return the brush; 
} 
Case Qt: : TextAlignmentRole: 
{
Return Qt: : AlignHCenter; 
} 
Case Qt: : CheckStateRole: 
{
Return Qt: : Checked; 
} 
Case Qt: : TextColorRole: 
{
QColor CLR (Qt: : black); 
Return the CLR. 
} 
Case Qt: : ToolTipRole: 
{
Return "Formula List"; 
} 
} 
} 

Table cell proxy class code is as follows:

 class CheckBoxDelegate: public QStyledItemDelegate 
{
Q_OBJECT 

Public: 
CheckBoxDelegate (QObject * parent); 
~ CheckBoxDelegate (); 

/* * * * * if you use a proxy instead of editor factory to provide the editor, the virtual function of the following must be overloaded * * * * * * * */
QWidget * createEditor (QWidget * parent, const QStyleOptionViewItem & amp; Option, 
Const QModelIndex & amp; The index) const; 
Void setEditorData (QWidget * editor, const QModelIndex & amp; The index) const; 
Void updateEditorGeometry (QWidget * editor, 
Const QStyleOptionViewItem & amp; Option, 
Const QModelIndex & amp; The index) const; 
Void setModelData (QWidget * editor, QAbstractItemModel * model, const QModelIndex & amp; The index) const; 
Void paint (QPainter * painter, const QStyleOptionViewItem & amp; Option, const QModelIndex & amp; The index) const; 
Protected: 
Private: 

}; 
CheckBoxDelegate: : CheckBoxDelegate (QObject * parent) 
: QStyledItemDelegate (parent) 
{

} 

CheckBoxDelegate: : ~ CheckBoxDelegate () 
{

} 
* CheckBoxDelegate QWidget: : createEditor (QWidget * parent, const QStyleOptionViewItem & amp; Option, 
Const QModelIndex & amp; Const index) 
{
QVariant value=(https://bbs.csdn.net/topics/index.model) -> data (index, Qt: : DisplayRole); 

If (index. The column ()==0) 
{
PBox QCheckBox *=new QCheckBox (parent); 
PBox - & gt; SetText (value. The toString ()); 
Return pBox; 
} 
The else 
{
PBox QComboBox *=new QComboBox (parent); 
PBox - & gt; AddItems (value. ToStringList ()); 
Return pBox; 
} 
} 
Void CheckBoxDelegate: : setEditorData (QWidget * editor, const QModelIndex & amp; Const index) 
{
QVariant value=(https://bbs.csdn.net/topics/index.model) -> data (index, Qt: : EditRole); 

If (index. The column ()==0) 
{
Bool checked=value. ToBool (); 

PBox QCheckBox *=static_cast & lt; QCheckBox * & gt; (editor); nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull