然后我将工程目录下的Makefile删除,然后重新编译、链接文件,刚才的错误消失了,但出现如下三个错误: error: 'staticMetaObject' is not a member of 'QGraphicsItem' error: 'qt_metacast' is not a member of 'QGraphicsItem' error: 'qt_metacall' is not a member of 'QGraphicsItem' 通过google,我发现...
然后我将工程目录下的Makefile删除,然后重新编译、链接文件,刚才的错误消失了,但出现如下三个错误: error: 'staticMetaObject' is not a member of 'QGraphicsItem' error: 'qt_metacast' is not a member of 'QGraphicsItem' error: 'qt_metacall' is not a member of 'QGraphicsItem' 通过google,我发现...
tmp/moc/moc_Controller.cpp:61: error: 'qt_metacast' is not a member of 'AbstractClass' tmp/moc/moc_Controller.cpp: In member function 'virtual int Controller::qt_metacall(QMetaObject::Call, int, void**)': tmp/moc/moc_Controller.cpp:66: error: 'qt_metacall' is not a member of '...
debug/moc_QQUserItem.cpp: In member function 'virtual int QQUserItem::qt_metacall(QMetaObject::Call, int, void**)': debug/moc_QQUserItem.cpp:64:11: error: 'qt_metacall' is not a member of 'QTreeWidgetItem' debug/moc_QQUserItem.cpp: In member function 'virtual void* QQUserItem::...
信号和插槽仅在QObject派生类中可用，并且需要一个Q_OBJECT宏。
Q_ASSERT (variant. canConvert (QMetaType::QSize) ) ; Q_ASSERT (fontVariant. canConvert (QMetaType::QFont) ) ; Qt::escape已被弃用 error : 'escape' is not a member of 'Qt' 所以应该更改下面代码: if(result ==QString( ) )
return a.exec(); } 这里使用了SIGNAL和SLOT这两个宏,将两个函数名转换成了字符串。注意到connect()函数的 signal 和 slot 都是接受字符串,一旦出现连接不成功的情况,Qt4是没有编译错误的(因为一切都是字符串,编译期是不检查字符串是否匹配),而是在运行时给出错误。这无疑会增加程序的不稳定性。
Added Convert Function Call to Qt Meta-Method Invocation (QTCREATORBUG-15972) Added Move Class to a Dedicated Set of Source Files (QTCREATORBUG-12190) Added Re-order Member Function Definitions According to Declaration Order (QTCREATORBUG-6199) Added Add Curly Braces for do, while, and for lo...
We recommend moving vcpkg to a short path such as 'C:\src\vcpkg' or using the subst command. Call Stack (most recent call first): ports/qt5-base/portfile.cmake:1 (vcpkg_buildpath_length_warning) scripts/ports.cmake:172 (include) ...
代码中我们可以看到,这里是通过post一个QMetaCallEvent的事件到事件循环中,然后由事件循环去触发槽函数的调用。