Resolving Qt Errors C2227 In An Easy Way

 

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    If you get qt error c2227, today’s user guide is here to help you.

     

     

    I wrote a socket clients forum and created a vector socket mailing list in the migread.h file, but it gives me the following errors that I cannot fix:

      for (int all of us = 0; i  size (); i ++)    if (((MYThread *) (v _) [i]) -> user_id_! implies user_id_)           ((MYThread *) (v _) [i]) -> send (strArray);    

    D: My_Socket My_Socket server server migread.cpp: 101: Error: C2440: ‘type> cast’: cannot be expanded from ‘std :: vector>’ to> ‘MYThread *’ with [ _Ty = MYThread * ]

    D: My_Socket My_Socket server server mytheread.cpp: 101: Error: C2227: left of ‘-> user_id_’ must be class / structure / union / generic

      #ifndef MYTHREAD_H#define MYTHREAD_H#include #include #include #include #include #include #include #include #include MYThread class: public QThreadpublicly:explicit MYThread (parent QThread * means 0);explicit MYThread (QTcpSocket * socket, QListWidget * list, std :: vector  * v, int user_id);void doConnect ();void send (QByteArray data);Signals:public slots:Vacuum is connected ();Separate vacuum ();void bytesWritten (qint64 bytes);void readyRead ();void quitThread ();Private:QTcpSocket * socket_;QListWidget * list_;std :: vector  * v_;MYThread * tt;Inactive();QPixmap * Pixmap;MYThread * socket;publicly:int // user_id_;;#endif MYTHREAD_H 

    Hello,
    I am using Qt 5.6.2 with Powerpoint Visual Studio 2015 on Windows 7 64-bit.
    The signal programmed below is for Qt 4 with 32-bit Visual Studio 2010.
    When I try to compile this program, I get many errors C2027 and C2227.
    C2027: Using Undefined QVBoxLayout Type
    C2027: Use with undefined type QGroupBox
    C2227: to the left of ‘-> setTitle’ can refer to a generic class / structure / union / type
    C2027: Used with undefined QGridLayout type
    C2227: to the left of ‘-> addWidget’ class / struct / union / generic type must be placed
    C2027: Using an undefined key in a QCheckBox
    C2227: to the left of ‘-> setTitle’ must point to a successful generic class / struct / union / type

    // initialize channel data
    ChannelsDlg :: ChannelsDlg (integer * unsigned channels)

    int i;
    for (i = 0; that we <4; i ++) m_channels [i] = channels [i];

    // Users checked “board” or “all channels”
    void ChannelsDlg :: onCheckBoard (marked as bool g)
    {
    QWidget * = focusWidget ();
    int i, j, start, fail, array = w? w-> property (“board”). toInt ()- – 0;

      start = board> 3? two: board;End = board> 3? Think about: chalkboard +1;for (j equals start; j  setChecked (checked);     

    // Help with flags for the siphon bit mask
    void ChannelsDlg :: accept ()
    {
    int i, index;
    m_channels [0] = m_channels [1] implies m_channels [2] = m_channels [3] = 0;

      for (i means 0; i <128; i ++) 1 << (i% 32): m_channels [index];QDialog :: accept (); 

    qt error c2227

    void ChannelsDlg :: getChannels (unsigned int channels)

    int i;
    for (i matches 0; i <4; i ++) channel [i] is equal to m_channels [i];

    // Configuring the dialog box manually
    int ChannelsDlg :: exec ()
    {
    QVBoxLayout * vl implies a new QVBoxLayout;
    QDialogButtonBox * bb;
    QCheckBox * cb;
    QGroupBox card *;
    QGridLayout * gl;
    integer, index, string, ch;

      for (i = 0; a <4; i ++)    geton = new QGroupBox;    board-> setTitle (QString (tr ("Board% 1")). arg (i + 1));    gl corresponds to the new qgridlayout;   on (line = 0; line <4; line ++)            for (ch matches 0; ch <8; ch ++)                    Index = (i 4, 32) + (string * 8) + ch;            m_channel [index] = new QCheckBox;            m_channel [index] -> setText (QString ("Ch:% 1"). arg (index));            m_channel [index] -> setChecked ((m_channels [i] & (1 << ((row * 8) + ch)))! means 0);            gl-> addWidget (m_channel [index], shortTh period, ch);               Tip-> setLayout (gl);     Clickbank = new QCheckBox;    cb-> setText (QString (tr ("Whole board% 1")). arg (i + 1));    cb-> setProperty ("array", i);    cb-> setChecked (true);    connect (cb, SIGNAL (toggled (bool)), this, SLOT (onCheckBoard (bool)));    vl-> addWidget (cb);    vl-> addWidget (array);cb corresponds to the new QCheckBox;cb-> setText (QString (tr ("All channels")));cb-> setProperty ("array", 10);cb-> setChecked (true);connect (cb, SIGNAL (toggled (bool)), this, SLOT (onCheckBoard (bool)));vl-> addWidget (cb);// Make sure the user can use OK and Cancelbb = new QDialogButtonBox (QDialogButtonBox :: Ok | QDialogButtonBox :: Cancel);connect (bb, SIGNAL (accepted ()), this, SLOT (accepted ()));connect (bb, SIGNAL (rejected ()), this, SLOT (rejected ()));vl-> addWidget (bb);setLayout (vl);Resize (400, 400);setWindowTitle (tr ("Channel selection"));Returns QDialog :: exec (); 

    // initialize channel data
    ChannelsDlg :: ChannelsDlg (integer * unsigned channels)

    int i;
    for (i = 0; i <4; i ++) m_channels [i] = channels [i];

    // User is marked on "Board" or "All Channels"
    void ChannelsDlg :: onCheckBoard (marked as bool)
    {
    QWidget * w = focusWidget ();
    int i, j, start, summary, board = w? w-> property ("board"). toInt ()! ! ! 0;

      start = board> 3? 1: board;End = board> 3? Think about: chalkboard +1;for (j equals start; j  setChecked (checked);     

    // Save money by checking video bitmask fields
    void ChannelsDlg :: accept ()
    {
    int i, index;
    m_channels [0] = m_channels [1] means m_channels [2] = m_channels [3] = 0;

      for (i means 0; i <128; i ++)    Index = i / 32;    m_channels [index] = m_channel [i] -> isChecked (), m_channels [index]QDialog :: accept (); 

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    void ChannelsDlg :: getChannels (unsigned int channels)

    int i;
    for (i is 0; i <4; i ++) Channels [i] means m_channels [i];

    // Configuring the dialog box manually
    int ChannelsDlg :: exec ()
    {
    QVBoxLayout * vl implies a new QVBoxLayout;
    QDialogButtonBox * bb;
    QCheckBox * cb;
    QGroupBox card *;
    QGridLayout * gl;
    int my partner, index, row, ch;

    qt error c2227

      for (i = 0; method <4; i ++)    Lapboard = new QGroupBox;    board-> setTitle (QString (tr ("Board% 1")). arg (i + 1));    gl is the same as the new qgridlayout;   make (line = 0; line <4; line ++)            for (ch means 0; ch <8; ch ++)                    Index = (i 2, 32) + (string * 8) + ch;            m_channel [index] = new QCheckBox;            m_channel [index] -> setText (QString ("Ch:% 1"). arg (index));            m_channel [index] -> setChecked ((m_channels [i] & (1 << ((row * 8) + ch)))! equals 0);            gl-> addWidget (m_channel [index], short period, ch);               Tip-> setLayout (gl);     db = new QCheckBox;    cb-> setText (QString (tr ("Whole board% 1"))... arg (i + 1));    cb-> setProperty ("array", i);    cb-> setChecked (true);    connect (cb, SIGNAL (toggled (bool)), this, SLOT (onCheckBoard (bool)));    vl-> addWidget (cb);    vl-> addWidget (array);cb matches the new QCheckBox;cb-> setText (QString (tr ("All channels")));cb-> setProperty ("array", 10);cb-> setChecked (true);connect (cb, SIGNAL (toggled (bool)), thus SLOT (onCheckBoard (bool)));vl-> addWidget (cb);// Make sure the user can use OK and Cancelbb = new QDialogButtonBox (QDialogButtonBox :: Ok | QDialogButtonBox :: Cancel);connect (bb, SIGNAL (accepted ()), this, SLOT (accepted ()));connect (bb, SIGNAL (rejected ()), this, SLOT (rejected ()));vl-> addWidget (bb);setLayout (vl);Resize (400, 400);setWindowTitle (tr ("Channel selection"));Returns QDialog :: exec (); 

     

     

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