Qt标准对话框之QFileDialog

QString MainWindow::showFileDialog(QFileDialog::AcceptMode mode, QString title)
{
QString ret = "";

QFileDialog fd(this);

QStringList filters;

filters.append("Text File (*.txt)");
filters.append("All Files (*)");

fd.setWindowTitle(title);
fd.setAcceptMode(QFileDialog::AcceptOpen);      //打开模式
fd.setNameFilters(filters);                     //筛选器

if( mode == QFileDialog::AcceptOpen)
{
fd.setFileMode(QFileDialog::ExistingFile);
}
if( fd.exec() == QFileDialog::Accepted )
{
ret = fd.selectedFiles()[0];
}

return ret;
}