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void MainWindow::on_pushButton_clicked()
{
dlg_btn1 *dlg1 = new dlg_btn1;
dlg1->exec();
}
mainwindow.obj:-1: 错误:LNK2019: 无法解析的外部符号
"public: __thiscall dlg_btn1::dlg_btn1(class QWidget *)"
(??0dlg_btn1@@QAE@PAVQWidget@@@Z),该符号在函数
"private: void __thiscall MainWindow::on_pushButton_clicked
(void)" (?on_pushButton_clicked@MainWindow@@AAEXXZ) 中被引用
dlg_btn1 *dlg1 = new dlg_btn1;
dlg1->exec();
#ifndef DLG_BTN1_H
#define DLG_BTN1_H
#include <QDialog>
namespace Ui {
class dlg_btn1;
}
class dlg_btn1 : public QDialog
{
Q_OBJECT
public:
explicit dlg_btn1(QWidget *parent = 0);
~dlg_btn1();
private:
Ui::dlg_btn1 *ui;
};
#endif // DLG_BTN1_H
dlg_btn1.cpp文件:
#include "dlg_btn1.h"
#include "ui_dlg_btn1.h"
dlg_btn1::dlg_btn1(QWidget *parent) :
QDialog(parent),
ui(new Ui::dlg_btn1)
{
ui->setupUi(this);
}
dlg_btn1::~dlg_btn1()
{
delete ui;
}
#include "mainwindow.h"
#include <QApplication>
#include"dlg_btn1.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.h文件:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
mainwindow.cpp文件:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include"dlg_btn1.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
dlg_btn1 *dlg1 = new dlg_btn1;
dlg1->exec();
}
按钮单击函数中能正常弹出messagebox的,就是不能调用其他对话框