qt - 在自定义类中扩展QFrame

我想创建自己的自定义窗口小部件来扩展QFrame，但是当我尝试使构造函数出现错误时。

#ifndef CONTROLFRAME_H
#define CONTROLFRAME_H

#include <QObject>
#include <QFrame>
#include <QWidget>
#include <QtGui>

class ControlFrame : public QFrame
{
    Q_OBJECT

public:
    ControlFrame(QWidget *parent = 0);
    ~ControlFrame();

private:
    QWidget *m_parent;
};

#endif // CONTROLFRAME_H

和CPP

#include "controlframe.h"

ControlFrame::ControlFrame(QWidget *parent)
    : QFrame(parent)
{
    m_parent = parent;
}

ControlFrame::~ControlFrame()
{

}

可悲的是，我收到以下错误

Undefined symbols for architecture x86_64:
  "vtable for ControlFrame", referenced from:
      ControlFrame::ControlFrame(QWidget*) in controlframe.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [PFEtest.app/Contents/MacOS/PFEtest] Error 1
18:54:21: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project PFEtest (kit: Desktop Qt 5.4.0 clang 64bit)
When executing step "Make"

我究竟做错了什么？

最佳答案

我认为，如果您从.h中删除Q_OBJECT，那就没问题了。我不确定，但是因为您是从QFrame继承的，所以对象中已经有了Q_OBJECT。