如何查看窗体类有哪些子对象

class frmMain : public QWidget

{

    Q_OBJECT

public:

    explicit frmMain(QWidget *parent = 0);

    ~frmMain();

signals:

    int sim();

private slots:

    void ClientReadData(int clientID,QString IP,int Port,QByteArray data);

    void ClientConnect(int clientID,QString IP,int Port);

    void ClientDisConnect(int clientID,QString IP,int Port);

    void on_btnListen_clicked();

    void on_btnSend_clicked();

    void on_btnClear_clicked();

private:

    Ui::frmMain *ui;

    myTcpServer *server;

    void Init();

};

    frmMain w;
    w.show();
    QObjectList list = w.children();  //获取子对象列表
    QObjectList::iterator it;//迭代器遍历对象列表
    for (it = list.begin(); it < list.end(); it++)
    {
        qDebug()<<*it;
    }