我正在尝试使用 Qt 创建一个接口，以强制任何子类实现两个主要方法 set 和 get title。但是当我尝试编译它时，我收到一条奇怪的错误消息，上面写着关于 qt_check_for_QOBJECT_macro 和 staticMetaObject 的信息。在 mainwindow.cpp 中，我必须将任何页面转换为界面，以便我可以依赖 getter 和 setter 方法。我看不出有任何其他方法可以做到这一点。
这是我的代码：
//IPage.h
#ifndef IPAGE_H
#define IPAGE_H
#include
class IPage
{
public:
virtual QString title()=0;
virtual void setTitle(QString t)=0;
};
#endif // IPAGE_H
//buildings.h:
#ifndef BUILDINGS_H
#define BUILDINGS_H
#include "IPage.h"
#include
class Buildings : public IPage, public QDialog
{
Q_OBJECT
private:
QString m_title;
//stuff...
};
#endif
//buildings.cpp
//stuff...
void Buildings::setTitle(QString t)
{
m_title = t;
setWindowTitle(t);
}
QString Buildings::title()
{
return m_title;
}
//mainwindow.cpp:
QMdiSubWindow *MainWindow::findChild(const QString &title)
{
foreach (QMdiSubWindow *window, mdiArea->subWindowList()) {
IPage *child = qobject_cast
if (child->title() == title)
return window;
}
return 0;
}
编译代码时收到此错误消息：
In file included from c:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qabstractanimation.h:45,
from c:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/QtCore:3,
from c:\QtSDK\Desktop\Qt\4.8.1\mingw\include\QtGui/QtGui:3,
from mainwindow.cpp:1:
c:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qobject.h: In function 'T qobject_cast(QObject*) [with T = IPage*]':
mainwindow.cpp:178: instantiated from here
c:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qobject.h:378: error: 'class IPage' has no member named 'qt_check_for_QOBJECT_macro'
c:\QtSDK\Desktop\Qt\4.8.1\mingw\include/QtCore/qobject.h:380: error: 'class IPage' has no member named 'staticMetaObject'
mingw32-make.exe[1]: Leaving directory `D:/Dropbox/Programmi/Qt/Scadenziario'
mingw32-make.exe[1]: *** [build/o/mainwindow.o] Error 1
mingw32-make.exe: *** [debug] Error 2
01:23:26: The process "C:\QtSDK\mingw\bin\mingw32-make.exe" exited with code 2.
Error while building project scadenziario (target: Desktop)
When executing build step 'Make'
我无法理解错误信息。我试图用谷歌搜索它，但我找不到任何有用的信息。任何帮助将不胜感激，在此先感谢。