ISO C++禁止聲明...沒有類型

Question

我正在使用C++爲maemo製作一個Qt移動應用程序。

我有我的類聲明，但我得到這個錯誤：

ISO C++ forbids declaration of 'QGeoPositionInfoSource' with no type 

我的代碼如下：

phonehelper.h

#ifndef PHONEHELPER_H 
#define PHONEHELPER_H 

#include <QObject> 
#include <QGeoPositionInfoSource> 


class PhoneHelper : public QObject 
{ 
    Q_OBJECT 

public: 
    explicit PhoneHelper(QObject *parent = 0); 
    void GetGPSData(const char * callbackSlot); 

private: 
    /* 
    * The error occures here on the line below */ 
    QGeoPositionInfoSource *gpsSource;   // PROBLEM HERE 

private slots: 
    void positionUpdated(const QGeoPositionInfo &info); 
}; 

#endif // PHONEHELPER_H 

phonehelper.cpp

#include "phonehelper.h" 

PhoneHelper::PhoneHelper(QObject *parent) : 
    QObject(parent) 
{ 
} 

PhoneHelper::GetGPSData(const char *callbackSlot) 
{ 
    gpsSource = QGeoPositionInfoSource::createDefaultSource(this); 
      if (gpsSource) { 
       connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), 
         this, SLOT(positionUpdated(QGeoPositionInfo))); 
       connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), 
         this, SLOT(callbackSlot(QGeoPositionInfo))); 
       gpsSource->startUpdates(); 
      } 
} 

PhoneHelper::positionUpdated(const QGeoPositionInfo &info) 
{ 
     gpsSource->stopUpdates(); 
     delete gpsSource; 
} 

Project.pro

DEPLOYMENTFOLDERS = # file1 dir1 

symbian:TARGET.UID3 = 0xE0EEBE99 


symbian:TARGET.CAPABILITY += NetworkServices 

# MOBILITY variable. 
CONFIG += mobility 
MOBILITY += location 

SOURCES += main.cpp mainwindow.cpp \ 
    phonehelper.cpp 
HEADERS += mainwindow.h \ 
    phonehelper.h 
FORMS += mainwindow.ui 


include(deployment.pri) 
qtcAddDeployment() 

是什麼上述錯誤是什麼意思？

Answer 1

我沒有看到，我不得不使用QtMobility的命名空間這樣using namespace QtMobility;