[提问]QTime  和update 问题 [复制链接]

QObject::startTimer(40);
void XXXX::TimeEvent(QTimeEvent *event)
{
          qDebug()<<QTime::currentTime().msec();
          item->update();
}

结果两次出发timeEvent的时间间隔是47ms   而非所设定的40ms    请问是为什么啊    
求帮助啊

引用楼主294987445于2011-08-23 14:33发表的 QTime  和update 问题 :
QObject::startTimer(40);
void XXXX::TimeEvent(QTimeEvent *event)
{
          qDebug()<<QTime::currentTime().msec();
          item->update();
.......

注意看Manual：

Note that QTimer's accuracy depends on the underlying operating system and hardware. Most platforms support an accuracy of 20 milliseconds; some provide more. If Qt is unable to deliver the requested number of timer events, it will silently discard some.

精度问题，在大interval时精度比较低
或许可以尝试使用QTimeLine来代替一下？