Solved error: LNK2019: unresolved external symbol " [QBarSet] [clean + qmake + rebuild don't fix the problem]
-
note: clean + qmake + rebuild don't fix the problem I use msvc2015 32 bits
Hi community,
I’m trying to create a class to insert a bar chart into MainWindow, but in the moment that I try to use a QBarSet pointer, i obtain from compiler the error below:mybars.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QtCharts::QBarSet::QBarSet(class QString,class QObject *)" (__imp_??0QBarSet@QtCharts@@QAE@VQString@@PAVQObject@@@Z) referenced in function "public: __thiscall myBars::myBars(void)" (??0myBars@@QAE@XZ) mybars.obj:-1: error: LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall myBars::metaObject(void)const " (?metaObject@myBars@@UBEPBUQMetaObject@@XZ) debug\my_HorBarras_v01.exe:-1: error: LNK1120: 9 unresolved externals
Please, could someone explain me why I obtain this issue and how to fix it?
Thanks in advancehere are my codes
mybars.h
#ifndef MYBARS_H #define MYBARS_H #include <QtWidgets/QApplication> #include <QtWidgets/QMainWindow> #include <QtCharts/QChartView> #include <QtCharts/QBarSeries> #include <QtCharts/QBarSet> #include <QtCharts/QLegend> #include <QtCharts/QBarCategoryAxis> #include <QtCharts/QHorizontalStackedBarSeries> QT_CHARTS_USE_NAMESPACE class myBars { public: myBars(); ~myBars(); private: QBarSet *set0; }; #endif // MYBARS_H
mybars.cpp
#include "mybars.h" myBars::myBars() { set0= new QBarSet("my"); *set0 << 1 << 10; } myBars::~myBars() { delete set0; }
mainwindow.h
#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <mybars.h> namespace Ui { class MainWindow; } class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = nullptr); ~MainWindow(); private: Ui::MainWindow *ui; myBars *bars; }; #endif // MAINWINDOW_H
mywindow.cpp
#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); setFixedSize(1024,768); bars = new myBars; } MainWindow::~MainWindow() { delete ui; }
-
Do you also link against the QtCharts module? https://doc.qt.io/qt-5.11/qtcharts-index.html
-
Thank you very much!!!
That was!!