使两个QT对话框相互关闭

// dialog1.h
#ifndef DIALOG1_H
#define DIALOG1_H

#include <QDialog>

namespace Ui {
class Dialog1;
}

class Dialog1 : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog1(QWidget *parent = nullptr);
    ~Dialog1();

signals:
    void dialog1Closed(); // 自定义信号，用于通知其他对话框

private slots:
    void on_pushButton_clicked(); // 按钮点击事件

private:
    Ui::Dialog1 *ui;
};

#endif // DIALOG1_H

// dialog1.cpp
#include "dialog1.h"
#include "ui_dialog1.h"

Dialog1::Dialog1(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog1)
{
    ui->setupUi(this);
}

Dialog1::~Dialog1()
{
    delete ui;
}

void Dialog1::on_pushButton_clicked()
{
    emit dialog1Closed(); // 发送自定义信号
    this->close(); // 关闭对话框
}

// dialog2.h
#ifndef DIALOG2_H
#define DIALOG2_H

#include <QDialog>

namespace Ui {
class Dialog2;
}

class Dialog2 : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog2(QWidget *parent = nullptr);
    ~Dialog2();

public slots:
    void closeDialog1(); // 槽函数，用于接收来自Dialog1的信号

private:
    Ui::Dialog2 *ui;
};

#endif // DIALOG2_H

// dialog2.cpp
#include "dialog2.h"
#include "ui_dialog2.h"

Dialog2::Dialog2(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog2)
{
    ui->setupUi(this);
}

Dialog2::~Dialog2()
{
    delete ui;
}

void Dialog2::closeDialog1()
{
    this->close(); // 关闭对话框
}

// mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "dialog1.h"
#include "dialog2.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void openDialog2(); // 打开Dialog2对话框

private:
    Ui::MainWindow *ui;
    Dialog1 *dialog1;
    Dialog2 *dialog2;
};

#endif // MAINWINDOW_H

// mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    dialog1 = new Dialog1(this);
    dialog2 = new Dialog2(this);

    connect(dialog1, &Dialog1::dialog1Closed, this, &MainWindow::openDialog2);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::openDialog2()
{
    dialog2->show(); // 打开Dialog2对话框
}