我有一个小的类无法正常工作,但我不知道出了什么问题。编译器显示以下信息:
main.cpp: error: undefined reference to 'CDetails::CDetails()'
以下是代码快照:
//main.cpp
#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"
#include <QQmlContext>
#include <QDebug>
class CDetails : public QObject
{ Q_OBJECT
public:
CDetails() {}
~CDetails(void) {}
public slots:
void cppSlot(const QString &msg)
{ qDebug() << "Called the C++ slot with message:" << msg;
}
};
int main(int argc, char *argv[])
{ QGuiApplication app(argc, argv);
QtQuick2ApplicationViewer viewer;
viewer.setMainQmlFile(QStringLiteral("qml/testqml/main.qml"));
viewer.showExpanded();
CDetails *test = new CDetails();
QObject::connect((QObject*)viewer.rootObject(),
SIGNAL(qmlSignal(QString)),test,
SLOT(cppSlot(QString)));
return app.exec();
}
在main.qml中:
import QtQuick 2.0
Rectangle {
id: guide
width: 360
height: 360
signal qmlSignal(string msg)
Text {
text: qsTr("Hello World")
anchors.centerIn: parent
}
property double scaleFactor: 1.0
property string iconUrl: "image.png"
MouseArea {
anchors.fill: parent
onClicked: {
guide.qmlSignal("Hello from QML")
}
}
}
更新: 感谢对构造函数提出的建议。现在错误是:
error: undefined reference to 'vtable for CDetails'
这里错过了什么?欢迎提出所有建议。