以下代碼可以將所選擇的文件所在的目錄分離出來,但只對全英文的目錄有效
QString imageName=QFileDialog::getSaveFileName(0,QString("Save image"),"../videoImage.jpg","Image (*.jpg)");
QStringList directories=imageName.split("/");
QString directory;
for(int i=0;i<directories.size()-1;i++){
directory.append(directories[i]);
directory.append("/");
}