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 10446 connect timed out 2019-12-02 14:35 −redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out at redis.cli...
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...
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*&, void (QAbstractSlider::*...
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的...
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...
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...
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...
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...
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...