编译通过,无警告,无错误。运行时,应用程序输出栏显示:QObject::connect: No Such slot ... 网上扒拉扒拉很多网友给的方案是这样的: 以后要是碰到no such slot的问题1、添加头文件#include<QCoreApplication>2、看类声明中有没有Q_OBJECT3、看slot函数有没有声明privateslots:voidxxxx();4、查看slot有没有出现...
Qt Greece 2023展示了如何在不使用QObject派生类的情况下向QML公开C++数据结构。该演示探讨了如何利用Qt的强大功能实现无缝的C++和QML集成,提供了一种清晰且高效的方法来展示和处理数据。通过这种方法,开发人员可以更好地利用Qt框架的灵活性和性能,从而更容易地构建复杂的跨平台应用程序。这次演示为开发人员提供了宝贵...
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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 //选中item后弹出右键菜单 if(event->button() == Qt::RightButton) {...
1 Qt and "No such slot" error 2 QT connect - "No such slot" error 0 Qt5: could not connect signal to slot 0 QObject::connect: No such signal runtime warning - cannot find the reasion for Hot Network Questions Is there any direct evidence for or against the idea of an ...
Qt: QObject::connect: No such slot Ask Question Asked5 years, 4 months ago Modified5 years, 4 months ago Viewed5k times I am building a small interface where I subclassedRVizwhich is a visualizer fromROS. According to theofficial documentationit is possible to re-use and re-implement some...
QtCore\QObject是QT的东西 要么你的机器上没装QT 要么你的QT没集成到VS2008里面去。
You cannot query the sender. In Qt you can check what object sent a signal. Again this relies on inheriting from a QObject and Qt managing states, which are somethings I was trying to avoid. The alternative is that you can sendselfas the first parameter of the signal. e.g.signal.emit...
执行上面语句,提示如下错误。connect 采用的是 Qt 5 的语法,问题原因是函数 valueChanged 有两个形态:QSpinBox::valueChanged(int) 和 QSpinBox::valueChanged(QString),编译器不知道要使用哪个函数 no matching functionfor call to QObject::connect(QSpinBox*&, <unresolved overloaded function type>, QSlider*&...
在类中使用信号/槽时一定要加Q_OBJECT宏,signal和slots的参数要一样 槽函数加(): connect(toTopLayerAction, SIGNAL(triggered()), this, SLOT(slotLayerTop()));// 正确 切记忘了():connect(toTopLayerAction, SIGNAL(triggered()), this, SLOT(slotLayerTop));// 错误...
QT运行出错:QObject::connect: Parentheses expected以及QObject::connect: No such slot *** 2019-02-13 13:55 −... 我来乔23 0 10391 connect timed out 2019-12-02 14:35 −redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out at redis.cli...