QColorDialog和QFileDialog的使用简单例子

    QColorDialog dialog(Qt::red, this);
    dialog.setOption(QColorDialog::ShowAlphaChannel);
    dialog.exec();
    QColor color = dialog.currentColor();

    QString fileName = QFileDialog::getOpenFileName(this, tr("文件对话框"), "D:", tr("图片文件(* png * jgp)"));