这篇文章主要讲解了“Qt信号入参使用QVariantList编译问题怎么解决”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“Qt信号入参使用QVariantList编译问题怎么解决”吧！
编译错误出现一大堆，这里只贴了前面的一部分，来看下：
In file included from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qglobal.h:1173:0,from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qnamespace.h:43,from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qobjectdefs.h:48,from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qobject.h:46,from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/QObject:1,from temp/moc/../../../test/module_function/test.h:4,from temp/moc/moc_test.cpp:9:D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qtypeinfo.h: In instantiation of 'class QTypeInfo<QVariant>':D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qlist.h:459:31: required from 'void QList<T>::node_copy(QList<T>::Node*, QList<T>::Node*, QList<T>::Node*) [with T = QVariant]'D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qlist.h:813:22: required from 'QList<T>::QList(const QList<T>&) [with T = QVariant]'temp/moc/moc_test.cpp:103:82: required from hereD:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qtypeinfo.h:67:26: error: invalid application of 'sizeof' to incomplete type 'QVariant'isLarge = (sizeof(T)>sizeof(void*)),^D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qtypeinfo.h:69:24: error: invalid application of 'sizeof' to incomplete type 'QVariant'sizeOf = sizeof(T)^In file included from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qobject.h:49:0,from D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/QObject:1,from temp/moc/../../../test/module_function/test.h:4,from temp/moc/moc_test.cpp:9:D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qlist.h: In instantiation of 'void QList<T>::node_copy(QList<T>::Node*, QList<T>::Node*, QList<T>::Node*) [with T = QVariant]':D:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qlist.h:813:22: required from 'QList<T>::QList(const QList<T>&) [with T = QVariant]'temp/moc/moc_test.cpp:103:82: required from hereD:/Qt/Qt5.10.0/5.10.0/mingw53_32/include/QtCore/qlist.h:462:28: error: invalid use of incomplete type 'class QVariant'
从错误里不太容易看出来错误原因和错误的代码位置，只能看到文件，是moc_test.cpp编译时引起的错误，可能和QVariant类型有关；
在代码中，没有使用QVariant类型的地方，使用QVariantLis的地方有两个，一个是信号的入参，一个是信号的入参，一个是函数的成员变量定义；我把这两个部分同时注释掉，发现编译可以通过了；单独注释掉信号定义，也可以编译过！这也是导致问题不好判断的地方。
后来加上头文件
#include <QVariantList>
然后就都可以编译通过了！
感谢各位的阅读，以上就是“Qt信号入参使用QVariantList编译问题怎么解决”的内容了，经过本文的学习后，相信大家对Qt信号入参使用QVariantList编译问题怎么解决这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！
原创文章，作者：kepupublish，如若转载，请注明出处：https://blog.ytso.com/223539.html