如何在Qt中利用计时器启用或禁用特定功能？-HowtoenableordisablespecificfunctionalityinQtusingatimer?

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it may be simpler to just keep a timestamp of the last time you called the function and update it when work is done:

保持上次调用函数的时间戳并在完成工作时更新它可能更简单：

//field
QElapsedTimer timeSinceLastCall;


//function
if(!timeSinceLastCall.isValid()||timeSinceLastCall.hasExpired(5*1000))
{
    timeSinceLastCall.restart();
    work();
}

however the function won't be thread safe (multiple threads can get into work()), you'll need some other way to exclude them such as:

但是该函数不是线程安全的（多线程可以进入work（）），你需要一些其他方法来排除它们，例如：

//field
QElapsedTimer timeSinceLastCall;
QMutex mutex;


//function
{
    QMutexLocker locker(&mutex);
    if(timeSinceLastCall.isValid() && !timeSinceLastCall.hasExpired(5*1000))
        return;
    timeSinceLastCall.restart();
}
work();