未定义对vtable的引用... [英] undefined reference to vtable for ...

问题描述

我想编写一个Http代理，它基本上像 indianwebproxy

I am trying to write an Http proxy that basically works like indianwebproxy

所以我发射了qtcreator，但我的一个类是无法编译与臭名昭着的错误：未定义的引用vtable HttpProxyThreadBrowser 。我不知道为什么它这样做。我阅读了关于Stackoverflow的类似问题，显然是问题是未定义的虚拟方法不纯粹但我没有声明任何虚拟函数。这是我的类

So i fired up qtcreator and but one of my classes is failing to compile with the infamous error : undefined reference to vtable for HttpProxyThreadBrowser. I can't figure out why its doing this. I read through similar questions on Stackoverflow and apparently the problem is with undefined virtual methods that are not pure But i have not declared any virtual functions. Here is my class

class HttpProxyThreadBrowser : public QThread
{
public:
    HttpProxyThreadBrowser(QTcpSocket outgoingSocket,QTcpSocket  browserSocket,QObject *parent = 0);
    ~HttpProxyThreadBrowser(){};
    void run();

private:
    QTcpSocket outgoingSocket;
    QTcpSocket browserSocket;

};

我在 pastebin ，以免钻孔。不幸的是，我不知道为什么vtable是未定义的。请帮助。

And I define the class here in pastebin so as not to bore you. Unfortunately i cant find out why the vtable is undefined. Please assist.

httpproxythreadbrowser.cpp:5: undefined reference to `vtable for HttpProxyThreadBrowser
collect2: ld returned 1 exit status

推荐答案

您不能复制 QTcpSocket s，因此如果您尝试通过复制而不是按地址传递它们，则可能会导致其他隐藏错误。

You can't copy QTcpSockets, so it may cause other cryptic errors if you try to pass them by copy rather than by address.

    HttpProxyThreadBrowser(QTcpSocket * outgoingSocket,QTcpSocket * browserSocket,QObject *parent = 0);

private:
    QTcpSocket* outgoingSocket;
    QTcpSocket* browserSocket;

完全重新编译项目可能会有帮助，当你更改头文件时，因为qmake生成的Makefile有时会失败注意到更改。

And completely recompiling your project may help, when you change header files, because qmake generated Makefile can sometimes fail to notice the changes.

这篇关于未定义对vtable的引用...的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！