我知道这个问题已经被问过很多次了，但我在这里和谷歌都找不到解决方案。
这是我的头文件
#ifndef MAINCONTROLLER_H
#define MAINCONTROLLER_H
#include <QSettings>
#include <QDebug>
#include <QDir>
#include <QObject>
#include "PhTools/PhString.h"
#include "PhStrip/PhStripDoc.h"
class MainController : public QObject
{
Q_OBJECT
public:
explicit MainController(QObject *parent = 0);
void loadSettings();
PhString getLastFile();
void setLastFile(PhString fileName);
bool openDoc(PhString fileName);
signals:
void docChanged();
private:
QSettings * _settings;
PhStripDoc * _doc;
};
#endif // MAINCONTROLLER_H
还有我的 CPP 文件：
#include "MainController.h"
MainController::MainController(QObject *parent) :
QObject(parent)
{
_doc = new PhStripDoc();
loadSettings();
}
void MainController::loadSettings()
{
_settings = new QSettings(QDir::homePath() + "/Library/Preferences/com.me.me.plist", QSettings::NativeFormat);
getLastFile();
}
PhString MainController::getLastFile()
{
qDebug() << "lastfile :" << _settings->value("last_file", "").toString();
return _settings->value("last_file").toString();
}
bool MainController::openDoc(PhString fileName)
{
bool succeed = _doc->openDX(fileName);
if (succeed)
emit docChanged();
return succeed;
}
void MainController::setLastFile(PhString filename)
{
_settings->setValue("last_file", filename);
}
这是错误日志：
Undefined symbols for architecture x86_64:
"MainController::docChanged()", referenced from:
MainController::openDoc(QString) in MainController.o
"vtable for MainController", referenced from:
MainController::MainController(QObject*) in MainController.o
MainController::MainController(QObject*) in MainController.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)
它可能来自，signals但我不确定...