Qt: 非阻塞时间延迟；

1、使用时间耗损循环；

#include <QTime>
...
QTime delayTime = QTime::currentTime().addMSecs(1000);
while( QTime::currentTime() < delayTime)
   QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
...

2、QTimer定时；

#include <QTimer>

...
QEventLoop loop;

QTimer::singleShot(500, &loop, SLOT(quit()));
...