Qt 對話框裏添加確定取消按鈕

有時候需要彈出一個小對話框，不想用designer設計，直接在代碼裏動態的生成。

如下圖所示：彈出一個帶下拉列表和確定取消按鈕的對話框

QDialog  dialog;
	dialog.setWindowTitle(tr("選擇要保存的格式"));
	
	QComboBox *box = new QComboBox(&dialog);
	box->addItem("jpg");
	box->addItem("bmp");
	box->addItem("png");
	box->addItem("tif");
	box->addItem("img");

	QDialogButtonBox *button = new QDialogButtonBox(&dialog);
	button->addButton( "OK", QDialogButtonBox::YesRole);
	button->addButton( "NO", QDialogButtonBox::NoRole);
	connect(button, SIGNAL(accepted()), &dialog, SLOT(accept()));
	connect(button, SIGNAL(rejected()), &dialog, SLOT(reject()));

	QVBoxLayout *layout = new QVBoxLayout;
	layout->addWidget(box);
	layout->addWidget( button);
	dialog.setLayout(layout);

	QString suffix ;
	if ( dialog.exec() == QDialog::Accepted)
 	{

		suffix = box->currentText();
		ImageConvert img;
		img.ConvertImages( files, dstpath.toStdString(), suffix.toStdString());
	}

點擊OK和NO按鈕會有響應。