Qt::AutoConnection 0 (Default) If the receiver lives in the thread that emits the signal, Qt::DirectConnection is used. Otherwise, Qt::QueuedConnection is used. The connection type is determined when the signal is emitted. Qt::DirectConnection 1 The
背景:一个线程通过signal-slot发送PVCI_CAN_OBJ类型的值到主线程中, 错误提示: QObject::connect: Cannot queue arguments of type 'PVCI_CAN_OBJ' (Make sure 'PVCI_CAN_OBJ' is registered using qRegisterMetaType().) 原因:在线程中通过signal-slot传递信息时,参数默认放到队列中的,但PVCI_CAN_OBJ是自定义的参数,不是Qt自带的参数
今天在ubuntu下安装了qtcreator,准备測试一下能否用.果然一測试就出问题了,简单编写后F5编译在gnome-terminal中出现 Cannot connect creator comm socket /tmp/qt_temp.u14973/stub-socket: No such file or directory 于是查了一下.知道qt不能用gnome-terminal运行,须要使用x-team.于是想到了解决方法: 找到:工具(Tools)->环境(environment)->
今天在ubuntu下安装了qtcreator,准备测试一下是否能用,果然一测试就出问题了,简单编写后F5编译在gnome-terminal中出现 Cannot connect creator comm socket /tmp/qt_temp.u14973/stub-socket: No such file or directory 于是查了一下,知道qt不能用gnome-terminal执行,需要使用x-team,于是想到了解决方法: 找到:工具(Tools)->环境(environment)-
一般情况下信号槽直接连接方式不会出现问题,但是如果信号与槽在不同线程或Qt::QueuedConnection方式连接,可能会在连接期间报以下类似问题,如: QObject::connect: Cannot queue arguments of type 'ThreadSignal' (Make sure 'ThreadSignal' is registered using qRegisterMetaType().) 或者 QObject::connect: Cannot queue argum
我在QGraphicsScene子类中添加了item的弹出菜单,并连接Action到槽函数,结果槽函数不起作用,输出:QObject::connect: No such slot *** C++ Code 12345678910111213141516171819202122232425 //选中item后弹出右键菜单 if (event->button() == Qt::RightButton) { m_pItemSelected = nullptr; foreach