Qt 计时时间显示

QString getTimeFromSec(int sec)

{

    if(sec<0) return "0:0:0";

    int second = sec%60;

    int min    = (sec/60)%60;

    int hour   = sec/3600;

    QString str = QString("%1:%2:%3").arg(hour).arg(min).arg(second);

    return str;

}

int getSecFromTime(QString time)

{

    QStringList strList = time.split(":");

    if(strList.size() != 3) return 0;

    int second = strList[2].toInt();

    int min    = strList[1].toInt();

    int hh     = strList[0].toInt();

    return (hh*3600+min*60+second);

}