我收到此错误消息：
C:\Users\Rick\Documents\Qt-Übung\testVisualizer\main.cpp:12: error: passing 'const ChartData' as 'this' argument of 'int ChartData::getHour()' discards qualifiers [-fpermissive]
qDebug() << myVis.getChartDataVector().at(0).getHour();
^
出于测试目的，我删除所有const。但是这个错误仍然存在。
将所有getter作为const方法我每次调用setter时都会遇到60多个错误。
我不知道它来自哪里。
的main.cpp
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
Visualize myVis;
myVis.handleDataFromString("C:\\Users\\Rick\\Google Drive\\FH Sachen\\5. Semester\\EMS\\ricks code\\maitime-20151026.json");
qDebug() << myVis.getChartDataVector().at(0).getHour();
/*
for(int i = 0; i < myVis.getChartDataVector().size(); i++){
qDebug() << "--------Whitelist--------";
for(int j = 0; j < myVis.getChartDataVector().at(i).getWhitelist().size(); j++){
qDebug() << "Stunde: " << myVis.getChartDataVector().at(i).getHour() << "Name: " << myVis.getChartDataVector().at(i).getWhitelist().at(j).getName() << "Zeit: " << myVis.getChartDataVector().at(i).getWhitelist().at(j).getTotalTime();
}
qDebug() << "--------Blacklist--------";
for(int j = 0; myVis.getChartDataVector().at(i).getBlacklist().size(); j++){
qDebug() << "Stunde: " << myVis.getChartDataVector().at(i).getHour() << "Name: " << myVis.getChartDataVector().at(i).getBlacklist().at(j).getName() << "Zeit: " << myVis.getChartDataVector().at(i).getBlacklist().at(j).getTotalTime();
}
}
*/
return a.exec();
}
visualize.h
#ifndef VISUALIZE_H
#define VISUALIZE_H
#include <QObject>
#include <QVector>
#include "applicationdata.h"
#include "chartdata.h"
class Visualize
{
QVector<ChartData> _chartDataObjects;
int _lastChangeChart, _lastChangeApp, _chartRef, _appRef;
bool _lastChange;
public:
Visualize();
QVector<ChartData> &getChartDataVector();
void handleDataFromString(QString filepath);
private:
void findPosition(QString name, bool onWhitelist, int hour, int &chartRef, int &appRef, QString url = "");
signals:
public slots:
};
#endif // VISUALIZE_H
visualize.cpp
#include "visualize.h"
#include "applicationdata.h"
#include "chartdata.h"
#include <QFile>
#include <QJsonDocument>
#include <QJsonObject>
#include <QDebug>
long ApplicationData::_totalTimeAll(0);
Visualize::Visualize()
{
}
QVector<ChartData> &Visualize::getChartDataVector()
{
return _chartDataObjects;
}
void Visualize::handleDataFromString(QString filepath)
{
QString line;
QFile file(filepath);
QJsonDocument d;
QJsonObject o;
ChartData tempChart;
ApplicationData tempApp;
QString tempName, tempUrl, tempTimeString;
bool tempOnWhitelist;
QTime tempTime, fullHour;
int tempHour;
_lastChangeChart = -1, _lastChangeApp = -1, _chartRef = -1, _appRef = -1;
file.open(QIODevice::ReadOnly | QIODevice::Text);
if(!file.exists()){
qDebug() << "Error read File!";
}
while(!file.atEnd()){
line = file.readLine();
d = QJsonDocument::fromJson(line.toUtf8());
o = d.object();
tempName = o.value(QString("process")).toString();
tempUrl = o.value(QString("url")).toString();
tempTimeString = o.value(QString("time")).toString();
tempOnWhitelist = o.value(QString("whitelisted")).toBool();
tempTime = QTime::fromString(tempTimeString, "hh:mm:ss");
tempHour = tempTime.hour();
//existing object is searched in vector
findPosition(tempName, tempOnWhitelist, tempHour, _chartRef, _appRef, tempUrl);
//if instance with actual hour not exist
if(_chartRef == -1){
tempChart.setHour(tempHour);
_chartDataObjects.append(tempChart);
_chartRef = _chartDataObjects.size()-1;
//_lastChangeChart = _chartRef;
}
//if an old object exist
if(_lastChangeApp != -1){
if(_chartDataObjects[_lastChangeChart].getHour() == tempHour){
if(_lastChange){
_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).setEndTime(tempTime);
_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).calcTimes();
} else {
_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).setEndTime(tempTime);
_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).calcTimes();
}
} else {
if(_lastChange){
fullHour.setHMS(tempHour, 0, 0);
_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).setEndTime(fullHour);
_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).calcTimes();
tempApp.setName(_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).getName());
tempApp.setUrl(_chartDataObjects[_lastChangeChart].getWhitelist().at(_lastChangeApp).getUrl());
tempApp.setStartTime(fullHour);
tempApp.setEndTime(tempTime);
_chartDataObjects[_chartRef].getWhitelist().append(tempApp);
_chartDataObjects[_chartRef].getWhitelist().at(_chartDataObjects[_chartRef].getWhitelist().size()-1).calcTimes();
} else {
fullHour.setHMS(tempHour, 0, 0);
_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).setEndTime(fullHour);
_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).calcTimes();
tempApp.setName(_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).getName());
tempApp.setUrl(_chartDataObjects[_lastChangeChart].getBlacklist().at(_lastChangeApp).getUrl());
tempApp.setStartTime(fullHour);
tempApp.setEndTime(tempTime);
_chartDataObjects[_chartRef].getBlacklist().append(tempApp);
_chartDataObjects[_chartRef].getBlacklist().at(_chartDataObjects[_chartRef].getBlacklist().size()-1).calcTimes();
}
}
}
if(tempName == "stopped"){
_lastChangeApp = -1;
_lastChangeChart = -1;
qDebug() << "Log gestoppet";
} else if(_appRef != -1){
if(tempOnWhitelist){
_chartDataObjects[_chartRef].getWhitelist().at(_appRef).setStartTime(tempTime);
_lastChangeApp = _appRef;
} else {
_chartDataObjects[_chartRef].getBlacklist().at(_appRef).setStartTime(tempTime);
_lastChangeApp = _appRef;
}
} else {
tempApp.setName(tempName);
tempApp.setStartTime(tempTime);
tempApp.setUrl(tempUrl);
if(tempOnWhitelist){
_chartDataObjects[_chartRef].getWhitelist().append(tempApp);
_lastChangeApp = _chartDataObjects[_chartRef].getWhitelist().size()-1;
_lastChange = true;
} else {
_chartDataObjects[_chartRef].getBlacklist().append(tempApp);
_lastChangeApp = _chartDataObjects[_chartRef].getBlacklist().size()-1;
_lastChange = false;
}
}
}
file.close();
}
void Visualize::findPosition(QString name, bool onWhitelist, int hour, int &chartRef, int &appRef, QString url)
{
if(onWhitelist){
for(int i = 0; i < _chartDataObjects.size(); i++){
if(hour == _chartDataObjects[i].getHour()){
for(int j = 0; j < _chartDataObjects[i].getWhitelist().size(); j++){
if(name == _chartDataObjects[i].getWhitelist().at(j).getName() && url == _chartDataObjects[i].getWhitelist().at(j).getUrl()){
chartRef = i;
appRef = j;
} else {
chartRef = i;
appRef = -1;
}
}
} else {
chartRef = -1;
appRef = -1;
}
}
} else {
for(int i = 0; i < _chartDataObjects.size(); i++){
if(hour == _chartDataObjects[i].getHour()){
for(int j = 0; j < _chartDataObjects[i].getBlacklist().size(); j++){
if(name == _chartDataObjects[i].getBlacklist().at(j).getName() && url == _chartDataObjects[i].getBlacklist().at(j).getUrl()){
chartRef = i;
appRef = j;
} else {
chartRef = i;
appRef = -1;
}
}
} else {
chartRef = -1;
appRef = -1;
}
}
}
}
chartdata.h
#ifndef CHARTDATA_H
#define CHARTDATA_H
#include "applicationdata.h"
class ChartData
{
int _hour;
QVector<ApplicationData> _whitelist;
QVector<ApplicationData> _blacklist;
public:
ChartData();
void setHour(int hour);
int getHour();
QVector<ApplicationData> &getWhitelist();
QVector<ApplicationData> &getBlacklist();
signals:
public slots:
};
#endif // CHARTDATA_H
chartdata.cpp
#include "chartdata.h"
ChartData::ChartData()
{
}
void ChartData::setHour(int hour)
{
_hour = hour;
}
int ChartData::getHour()
{
return _hour;
}
QVector<ApplicationData> &ChartData::getWhitelist()
{
return _whitelist;
}
QVector<ApplicationData> &ChartData::getBlacklist()
{
return _blacklist;
}
chartdata.cpp
#include "chartdata.h"
ChartData::ChartData()
{
}
void ChartData::setHour(int hour)
{
_hour = hour;
}
int ChartData::getHour()
{
return _hour;
}
QVector<ApplicationData> &ChartData::getWhitelist()
{
return _whitelist;
}
QVector<ApplicationData> &ChartData::getBlacklist()
{
return _blacklist;
}
applicationdata.h
#ifndef APPLICATIONDATA_H
#define APPLICATIONDATA_H
#include <QObject>
#include <QString>
#include <QTime>
#include <QDebug>
#include <QVector>
class ApplicationData
{
QString _name, _url;
QTime _startTime, _endTime;
long _totalTime;
static long _totalTimeAll;
public:
ApplicationData(QString name = "", QString url = ""):
_name(name), _url(url), _startTime(0,0), _endTime(0,0), _totalTime(0){}
//Setter
void setName(QString name);
void setUrl(QString url);
void setStartTime(QTime start);
void setEndTime(QTime end);
void setTotalTime(long totalTime);
//Getter
QString getName();
QString getUrl();
QTime getStartTime();
QTime getEndTime();
long getTotalTime();
static long getTotalTimeAll();
//Methodes
void calcTimes();
signals:
public slots:
};
#endif // APPLICATIONDATA_H
applicationdata.cpp
#include "applicationdata.h"
//Setter-------------------------------------------------------------------------
void ApplicationData::setName(QString name)
{
_name = name;
}
void ApplicationData::setUrl(QString url)
{
_url = url;
}
void ApplicationData::setStartTime(QTime start)
{
_startTime = start;
}
void ApplicationData::setEndTime(QTime end)
{
_endTime = end;
}
void ApplicationData::setTotalTime(long totalTime)
{
_totalTime = totalTime;
}
//Getter--------------------------------------------------------------------------
QString ApplicationData::getName()
{
return _name;
}
QString ApplicationData::getUrl()
{
return _url;
}
QTime ApplicationData::getStartTime()
{
return _startTime;
}
QTime ApplicationData::getEndTime()
{
return _endTime;
}
long ApplicationData::getTotalTime()
{
return _totalTime;
}
long ApplicationData::getTotalTimeAll()
{
return _totalTimeAll;
}
//Methoden--------------------------------------------------------------------------
void ApplicationData::calcTimes()
{
long tempTime;
tempTime = _startTime.secsTo(_endTime);
_totalTime += tempTime;
_totalTimeAll += tempTime;
}
答案 0 :(得分：3)
让NoSuchElement原型更改为此应修复它：
ChartData::getData()您需要这样做，因为 int getHour() const;
会返回const reference并且您正在调用非const方法。
答案 1 :(得分：0)
我得到一个解决方案。我无法使用QVector类中的at（）方法。现在我使用[]。
示例：
_chartDataObjects[_lastChangeChart].getWhitelist()[_lastChangeApp].calcTimes();