error LNK2019和error LNK2001
错误信息是error LNK2019: unresolved external symbol "_declspec(dllimport) public: _thiscall QTcpSocket::QTcpSocket(class QObject *)" (__imp_??OQTcpSocket@@QAE@PAVQObject@@@Z) referenced in function "public: __thiscall Device(class QObject *)"()
error LNK2001: unresolved external symbol "public: birtual struct QMetaObject const * __thiscall QTcpSocket::metaObject(void)const “
各位大神给看看哪里出错了???