Qt进度条实例

QProgressDialog progress("doing things......","cancel", 0, finalNum, this);
progress.setWindowModality(Qt::WindowModal);
for(int i = 0; i < finalNum; i++)
{
  progress.setValue(i);
  if(progress.wasCanceled())
  {
    break;
  }
  //do things
}
progress.setValue(finalNum);