Qt文档中有指出:With queued connections, the parameters must be of types that are known toQt's meta-object system, because Qt needs to copy the arguments to store them in an event behind the scenes. 一。 遇到的问题:在GUI主线程向另一个线程发送信号,槽函数不执行。 1staticEventLoop* gEventL...
//Connect a signal to a pointer to qobject member function// QtPrivate::FunctionPointer::Object返回发送信号的对象类型template static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer::Object *receiv...
With queued connections, the parameters must be of types that are known to Qt's meta-object system, because Qt needs to copy the arguments to store them in an event behind the scenes. If you try to use a queued connection and get the error message QObject::connect: Cannot queue argument...
connect(pushButton, SIGNAL(clicked()), dialog, SLOT(close()));Qt4和Qt5都可以使用这种连接方式。...
worker->moveToThread(&workerThread);//connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);connect(this, &Controller::operate, worker, &Worker::doWork);//connect(worker, &Worker::resultReady, this, &Controller::handleResults,Qt::DirectConnection);//works//co...
You cannot pass arguments in the connect function using the old syntax. Also the number and type of arguments need to match, so you can only connectclickedto functions without arguments. If you want to use the old syntax, you need to define 2 slots ...
qWarning("QObject::connect: Incompatible sender/receiver arguments" "\n %s::%s --> %s::%s", smeta->className(), signal.methodSignature().constData(), rmeta->className(), method.methodSignature().constData()); return QMetaObject::Connection(0); ...
With queued connections, the parameters must be of types that are known to Qt's meta-object system,because Qt needs to copy the arguments to store them in an event behind the scenes. 1. 2. 即使用排队方式的信号-槽机制,Qt的元对象系统(meta-object system)必须知道信号传递的参数类型。这里手动...
QOBject::connect:Cannot queue arguments of type 'MoSystemLog' (Make sure 'MoSystemLog' is registed using qRegisterMetaType().) 意思是说,信号槽队列中的数据类型必须是系统能识别的元类型,不然得用qRegisterMetaType()进行注册。 二、解决方法:
application.arguments存储应用启动时的参数。 application还有application.name、application.version、application.organization、application.domain这些属性,请查阅Qt帮助。 application有一个信号,aboutToQuit(),在应用要退出时发射,你可以连接它来做一些清理工作。它与QCoreApplication的aboutToQuit()是一个东西。