在Qt框架中,如果你尝试在一个非主线程中启动一个定时器,会遇到错误信息“Timers cannot be started from another thread”。这是因为Qt的定时器机制是基于事件循环的,而事件循环通常只在主线程(GUI线程)中运行。 解决方法 确保在主线程中启动定时器: 如果你需要从工作线程中启动定时器,应将启动操作发送到主线程。
MyObject*myObject=newMyObject(); connect(worker,&WorkerThread::requestStartTimer,myObject,&MyObject::startYourTimer); // 启动工作线程 worker->start(); 通过这些方法,你应该能够解决QObject::startTimer: Timers cannot be started from another thread的问题。
这个错误信息QObject::startTimer: Timers cannot be started from another thread表明你尝试从非主线程中启动了QTimer。在 Qt 中,定时器必须在其所属于的对象的线程中启动,而 QObject 的子类(如 QTimer)通常被限制在创建它们的线程中使用。 要解决这个问题,你可以采取以下步骤: 1. 确保在主线程中创建和启动定时...
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...
今天在调试输出里看见QObject::startTimer: timers cannot be started from another thread QTimer类 从Qt的帮助文档里可以得到他的使用方法。 1 2 3 QTimer *timer =newQTimer(this); connect(timer, SIGNAL(timeout()),this, SLOT(update()));
今天在调试输出⾥看见QObject::startTimer: timers cannot be started from another thread QTimer类 从Qt的帮助⽂档⾥可以得到他的使⽤⽅法。QTimer *timer = new QTimer(this);connect(timer, SIGNAL(timeout()), this, SLOT(update()));timer->start(1000);更多的可以查阅官⽅帮助，本⽂是...
runtime: failed to create new OS thread (12) This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. QObject::~QObject: Timers cannot be stopped from another thread ...
Saving Mapfile: map.bin ...done --- median tracking time: 0.0548361 mean tracking time: 0.0597198 Saving keyframe trajectory to KeyFrameTrajectory.txt ... trajectory saved! QObject::~QObject: Timers cannot be stopped from another thread Segmentation fault (core dumped) My system...
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...
最后想了想,应该是哪里直接操作(没有通过信号槽)QObject类(或子类)。果然,在一步一步中调试发现,某个地方直接给QWidget赋值图片操作QGraphicsScene了。 所以出现RT警告的情况有两个情况: 1、在不同线程中启动QTimer 2、在不同线程中直接操作QObject(及子类)...