1. 错误信息含义 QBasicTimer::start: timers cannot be started from another thread 这个错误信息表明你尝试从一个非主线程(即不是创建QBasicTimer对象的线程)中启动QBasicTimer。在Qt中,QBasicTimer(以及许多其他Qt类,特别是那些涉及GUI或事件处理的类)通常被设计为只能在创建它们的线程(通常是主线程或GUI线程)...
Cannot create children for a parent that is in a different thread. 或者 QObject::startTimer: Timers cannot be started from another thread QTimer定时器不能在不同的线程中启动。 出现这个主要原因是没有很好的将主线程和子线程进行区分。 我们看以下的多线程代码:(在Qt中的多线程) 这个是定义一个类继承...
QObject::startTimer: Timers cannot be started from another thread ——定时器不能被其它线程start。 我们来分析一下: 刚开始只有主线程一个,TestThread的实例是在主线程中创建的,定时器在TestThread的构造函数中,所以也是在主线程中创建的。 当调用TestThread的start()方法时,这时有两个线程。定时器的start()...
return; } else if (object->thread() != thread() || thread() != QThread::currentThread()) { qWarning("QObject::startTimer: timers cannot be started from another thread"); return; } ... 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 在Linux平台下: void QEventDispatcherGl...
qWarning("QObject::startTimer: timers cannot be started from another thread"); return; } ... 在这两个平台下,它都会检查当前线程和dispatcher的线程是否一致。不一致则直接返回。 为什么要这么设计。我不太清楚。或许是因为:注册定时器要用到回调函数,而回调函数需要在注册的线程执行(fix me)。
在QThread中使用QTimer 2015-09-04 10:23 − 设计界面原型用定时器模拟程序运行,处理数据的程序运行时间很长,并要实时显示进度,需要使用多线程技术。运行程序出现下面的警告: 1 QObject::startTimer: timers cannot be started from another thread ... alleyonine 0 1526 Qt QTimer 2018-11-29 14:03...
System.Threading.Timer: executes a single callback method on a thread pool thread at regular intervals. The callback method is defined when the timer is instantiated and cannot be changed. Like the System.Timers.Timer class, this class is intended for use as a server-based or service componen...
The third timer class comes from the System.Threading namespace. I'd like to say that this is the best of all timer classes, but that would be misleading. For one thing, I was surprised to find that instances of this class are not inherently thread safe, given that it resides in the...
("QObject::startTimer: Timers can only be used with threads started with QThread");return0;}if(Q_UNLIKELY(thread()!=QThread::currentThread())){qWarning("QObject::startTimer: Timers cannot be started from another thread");return0;}int timerId=d->threadData->eventDispatcher.load()->...
If theSynchronizingObjectproperty isnull, theElapsedevent is raised on aThreadPoolthread. If processing of theElapsedevent lasts longer thanInterval, the event might be raised again on anotherThreadPoolthread. In this situation, the event handler should be reentrant. ...