作者：北辰孤星123 | 来源：互联网 | 2023-10-11 08:34
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 &＃39;class QTypeInfo&＃39;:D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qlist.h:459:31: required from &＃39;void QList::node_copy(QList::Node*, QList::Node*, QList::Node*) [with T = QVariant]&＃39;D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qlist.h:813:22: required from &＃39;QList::QList(const QList&) [with T = QVariant]&＃39;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 &＃39;sizeof&＃39; to incomplete type &＃39;QVariant&＃39; 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 &＃39;sizeof&＃39; to incomplete type &＃39;QVariant&＃39; 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 &＃39;void QList::node_copy(QList::Node*, QList::Node*, QList::Node*) [with T = QVariant]&＃39;:D:\Qt\Qt5.10.0\5.10.0\mingw53_32\include/QtCore/qlist.h:813:22: required from &＃39;QList::QList(const QList&) [with T = QVariant]&＃39;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 &＃39;class QVariant&＃39;
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
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。这里是编程笔记，小编将为大家推送更多相关知识点的文章，欢迎关注！
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