QtCreator 对话框（二）QMessageBox(消息对话框),QProgressDialog (进度对话框),QErrorMessage(错误信息对话框),QWizardPage(向导对话框)

1.消息对话框

    //问题对话框

    int ret1 = QMessageBox::question(

                this,QString("问题对话框"),QString("first?"),QMessageBox::Yes,QMessageBox::No);

    if (ret1 == QMessageBox::Yes) {

        qDebug() << QString("问题！");

    }

    //提示对话框

    int ret2 = QMessageBox::information(

                this,QString("问题对话框"),QString("这是Qt书籍!"),QMessageBox::Ok);

    if (ret2 == QMessageBox::Ok) {

        qDebug() << QString("提示！");

    }

    //警告对话框

    int ret3= QMessageBox::warning(

                this,QString("警告对话框"),QString("不能提前结束！"),QMessageBox::Abort);

    if (ret3 == QMessageBox::Abort) {

        qDebug() << QString("警告！");

    }

    //错误对话框

    int ret4 = QMessageBox::critical(

                this,QString("严重错误对话框"),QString("发现一个严重错误！，现在要关闭所有文件!"),QMessageBox::YesAll);

    if (ret4 == QMessageBox::YesAll) {

        qDebug() << QString("错误！");

    }

    //关于对话框

    QMessageBox::about(this,QString("关于对话框"),QString("Qt及QtCreator的普及工作!"));

2.进度对话框

    QProgressDialog progressDlg(QString("文件复制进度"),QString("取消"),0,5000,this);

    progressDlg.setWindowTitle("进度对话框");    //设置窗口标题

    progressDlg.setWindowModality(Qt::WindowModal);//将对话框设置为模态

    progressDlg.show();

    for (int i=0; i<50000; i++) {   //演示复制进度

        progressDlg.setValue(i);    //进度条的值

        QCoreApplication::processEvents(); //避免界面冻结

        if (progressDlg.wasCanceled()) break; //按下取消按钮就中断

    }

    progressDlg.setValue(50000);	//保证显示的是100%

    qDebug() << QString("复制结束");

3.错误信息对话框

    QErrorMessage * errDlg = new QErrorMessage(this);

    errDlg->setWindowTitle(QString("错误信息对话框"));

    errDlg->showMessage(QString("这里是错误信息"));

4.向导对话框

• 添加向导页

• QWizardPage *createPage1();
  QWizardPage *createPage2();
  QWizardPage *createPage3();

• 生成向导

  QWizard wizard(this);

  wizard.setWindowTitle(QString("向导对话框"));

  wizard.addPage(createPage1());

  wizard.addPage(createPage2());

  wizard.addPage(createPage3());

  wizard.exec();