如何让程序等待一段时间
QTime t;
t.start();
while(t.elapsed()<1000);
这种死循环也是一种常见错误用法。但改成正确的还是比较简单的:
QTime t;
t.start();
while(t.elapsed()<1000)
QCoreApplication::processEvents();
参考:http://dreamylights.blog.51cto.com/1163218/1538220
QProgressDialog *progressDialog=new QProgressDialog(this); QFont font("ZYSong18030",12); progressDialog->setFont(font); progressDialog->setWindowModality(Qt::WindowModal); progressDialog->setMinimumDuration(5); progressDialog->setWindowTitle(tr("Please Wait")); progressDialog->setLabelText(tr("Copying...")); progressDialog->setCancelButtonText(tr("Cancel")); progressDialog->setRange(0,num); //num表示要传输的文件个数 for(int i=1;i<num+1;i++) { progressDialog->setValue(i); QApplication::processEvents(); if(progressDialog->wasCanceled()) return; } ProgressDialog->show();
http://www.qtcn.org/bbs/read-htm-tid-60831.html