qt(5) QMessageBox

最新推荐文章于 2025-07-27 10:38:39 发布

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本文详细介绍了Qt5中的QMessageBox类，包括如何创建警告、信息、询问和错误对话框，以及自定义按钮和操作响应。通过实例代码展示了在C++中如何在应用程序中集成这些功能。

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMessageBox>
#include <QDebug>

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

    if (QMessageBox::Yes == QMessageBox::question(this,tr("Question"),
                                                  tr("Are you OK?"),QMessageBox::Yes | QMessageBox::No,
                                                  QMessageBox::Yes)){
        QMessageBox::information(this,tr("1"),tr("I'm glad to hear that!"));}else{
        QMessageBox::information(this,tr("2"),tr("I'm sorry!"));}

    if (QMessageBox::warning(this,tr("Warning"),tr("Your wrong!"),QMessageBox::Yes)){QMessageBox::information(this,tr("1"),tr("2"));}


    QMessageBox::about(this,tr("Title"),tr("Text"));



    QMessageBox msgBox;
    msgBox.setText(tr("The document has been modified."));
    msgBox.setInformativeText(tr("Do you want to save your changes?"));
    msgBox.setDetailedText(tr("Differences here..."));
    msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Save);
    int ret = msgBox.exec();
    switch (ret) {
    case QMessageBox::Save:qDebug() << "Save document!";
        break;
    case QMessageBox::Discard:
        qDebug() << "Discard changes!";
        break;
    case QMessageBox::Cancel:
        qDebug() << "Close document!";
        break;
    }
}

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