C++ C++；插入成功后MFC CTabCtrl项目调试断言失败winocc.cpp SetWindowPos

在OnInitDialog中调用的方法：

void ChookDlg::add_tab_items()
    {
        tab_item_ptrs.push_back( tab_item_ptr( new CTabSLSensor ) );
        tab_item_ptrs.push_back( tab_item_ptr(new user_dlg) );
        tab_item_ptrs.push_back( tab_item_ptr( new admin_dlg ) );
        for ( auto tab_item_res_id = first_tab_item_res_id, idx = 0U; tab_item_res_id != last_tab_item_res_id + 1; ++tab_item_res_id, ++idx )
        {
            ASSERT(tab_item_ptrs.at(idx)->Create(tab_item_res_id, this)); // calls OnInitDialog
            tab_item_ptrs.at(idx)->ShowWindow(SW_HIDE);

            mapped_tab_items[static_cast< tab_item >(idx)] = 
                tab_item_image_container( 
                                            tab.InsertItem(tab.GetItemCount(), _T("SL Sensor"), tab_item_ptrs.back().get()),
                                            tab_item_ptrs.at(idx)
                                        );

        }
    }

LONG CMyTabCtrl::InsertItem(int nItem, LPCTSTR lpszItem, CMyTabCtrlTab *myTabCtrlTab)
{
    UINT mask = TCIF_PARAM;
    LPARAM lParam = reinterpret_cast<LPARAM>(myTabCtrlTab);

    if (NULL != lpszItem) {
        mask |= TCIF_TEXT;
    }
    ASSERT(myTabCtrlTab != NULL);
    LONG retval = CTabCtrl::InsertItem(mask, nItem, lpszItem, 0, lParam);
    if (retval < 0)
        return retval;

    CRect windowRect;
    GetWindowRect(&windowRect);
    AdjustRect(FALSE, &windowRect);
    // The left border is 3 pixel, the bottom border 2 pixel and the right border 1 pixel
    // Adjust to 1 pixel at each side.
    // windowRect.left -= 2;
    // windowRect.bottom += 1;
    GetParent()->ScreenToClient(&windowRect);
    myTabCtrlTab->SetWindowPos(&wndTop, windowRect.left, windowRect.top, windowRect.Width(), windowRect.Height(), SWP_HIDEWINDOW);

    return retval;
}

BOOL CWnd::SetWindowPos(const CWnd* pWndInsertAfter, int x, int y, int cx,
    int cy, UINT nFlags)
{
    ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));

BOOL ChookDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // Add "About..." menu item to system menu.

    // IDM_ABOUTBOX must be in the system command range.
    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);
    ASSERT((IDM_RECONNECT & 0xFFF0) == IDM_RECONNECT);
    ASSERT(IDM_RECONNECT < 0xF000);
    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        BOOL bNameValid;
        CString strAboutMenu;
        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
        ASSERT(bNameValid);
        CString strReconnectMenu;
        bNameValid = strReconnectMenu.LoadString(IDS_RECONNECT);
        ASSERT(bNameValid);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_RECONNECT, strReconnectMenu);
        }
    }

    // Set the icon for this dialog.  The framework does this automatically
    //  when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);         // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon

    // initialize tab item pointers container
    add_tab_items();
    tab.ChangeTab( static_cast< int >( tab_item::sensor ) );

    return TRUE;  // return TRUE  unless you set the focus to a control
}

private:
CMyTabCtrl tab;

模板设置正确

这是OnInitDialog:

void ChookDlg::add_tab_items()
    {
        tab_item_ptrs.push_back( tab_item_ptr( new CTabSLSensor ) );
        tab_item_ptrs.push_back( tab_item_ptr(new user_dlg) );
        tab_item_ptrs.push_back( tab_item_ptr( new admin_dlg ) );
        for ( auto tab_item_res_id = first_tab_item_res_id, idx = 0U; tab_item_res_id != last_tab_item_res_id + 1; ++tab_item_res_id, ++idx )
        {
            ASSERT(tab_item_ptrs.at(idx)->Create(tab_item_res_id, this)); // calls OnInitDialog
            tab_item_ptrs.at(idx)->ShowWindow(SW_HIDE);

            mapped_tab_items[static_cast< tab_item >(idx)] = 
                tab_item_image_container( 
                                            tab.InsertItem(tab.GetItemCount(), _T("SL Sensor"), tab_item_ptrs.back().get()),
                                            tab_item_ptrs.at(idx)
                                        );

        }
    }

LONG CMyTabCtrl::InsertItem(int nItem, LPCTSTR lpszItem, CMyTabCtrlTab *myTabCtrlTab)
{
    UINT mask = TCIF_PARAM;
    LPARAM lParam = reinterpret_cast<LPARAM>(myTabCtrlTab);

    if (NULL != lpszItem) {
        mask |= TCIF_TEXT;
    }
    ASSERT(myTabCtrlTab != NULL);
    LONG retval = CTabCtrl::InsertItem(mask, nItem, lpszItem, 0, lParam);
    if (retval < 0)
        return retval;

    CRect windowRect;
    GetWindowRect(&windowRect);
    AdjustRect(FALSE, &windowRect);
    // The left border is 3 pixel, the bottom border 2 pixel and the right border 1 pixel
    // Adjust to 1 pixel at each side.
    // windowRect.left -= 2;
    // windowRect.bottom += 1;
    GetParent()->ScreenToClient(&windowRect);
    myTabCtrlTab->SetWindowPos(&wndTop, windowRect.left, windowRect.top, windowRect.Width(), windowRect.Height(), SWP_HIDEWINDOW);

    return retval;
}

BOOL CWnd::SetWindowPos(const CWnd* pWndInsertAfter, int x, int y, int cx,
    int cy, UINT nFlags)
{
    ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));

BOOL ChookDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // Add "About..." menu item to system menu.

    // IDM_ABOUTBOX must be in the system command range.
    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    ASSERT(IDM_ABOUTBOX < 0xF000);
    ASSERT((IDM_RECONNECT & 0xFFF0) == IDM_RECONNECT);
    ASSERT(IDM_RECONNECT < 0xF000);
    CMenu* pSysMenu = GetSystemMenu(FALSE);
    if (pSysMenu != NULL)
    {
        BOOL bNameValid;
        CString strAboutMenu;
        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
        ASSERT(bNameValid);
        CString strReconnectMenu;
        bNameValid = strReconnectMenu.LoadString(IDS_RECONNECT);
        ASSERT(bNameValid);
        if (!strAboutMenu.IsEmpty())
        {
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
            pSysMenu->AppendMenu(MF_SEPARATOR);
            pSysMenu->AppendMenu(MF_STRING, IDM_RECONNECT, strReconnectMenu);
        }
    }

    // Set the icon for this dialog.  The framework does this automatically
    //  when the application's main window is not a dialog
    SetIcon(m_hIcon, TRUE);         // Set big icon
    SetIcon(m_hIcon, FALSE);        // Set small icon

    // initialize tab item pointers container
    add_tab_items();
    tab.ChangeTab( static_cast< int >( tab_item::sensor ) );

    return TRUE;  // return TRUE  unless you set the focus to a control
}

private:
CMyTabCtrl tab;

---

不确定这一点，因为MFC是一辈子以前的事了，但直觉告诉我，下面这句话是可疑的 GetParent（）->ScreenToClient（&windowRect）

应该调用GetClientRect而不是ScreenToClient。

在代码中

tab.InsertItem(tab.GetItemCount(), _T("SL Sensor"), tab_item_ptrs.back().get())

获取未初始化的对话框指针。它的形式应该是

tab.InsertItem(tab.GetItemCount(), _T("SL Sensor"), tab_item_ptrs.at(idx).get())

---

那么，是无效窗口句柄还是空m_pCtrlSite？m_hWnd应该是父句柄，m_pCtrlSite应该是选项卡项句柄。如果这是正确的，那么对话框应该是有效的（当所有行都在add_tab_items（）中时）注释后，对话框显示为空选项卡。只是想知道您是如何在

ChookDlg

中定义

tab

变量的。是否对此控件或DDE使用了“SubclassDlgItem”？调试器会说什么？其中一个无效，如果您将其添加到监视窗口并逐步查看代码，调试器会告诉您是哪一个断言失败。+myTabCtrlTab 0x0145ee10{hWnd=0x00000000{unused=？？？}CMyTabCtrlTab*这是输入到InsertItemwhere is&wndTop参数到SetWindowPos之后的数据。我没有看到它被声明或初始化。afxwin.h static AFX_data const CWnd wndTop；//SetWindowPos的pWndInsertAfterBTW，技术上你应该写

CWnd:：wndTop