qt 取消按钮点击效果_Qt 对话框里添加确定取消按钮

有时候需要弹出一个小对话框，不想用designer设计，直接在代码里动态的生成。

如下图所示：弹出一个带下拉列表和确定取消按钮的对话框

QDialog dialog;

dialog.setWindowTitle(tr("选择要保存的格式"));

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());

}

点击OK和NO按钮会有响应。