Qt中许多Windows函数的未解决的链接器错误

Question

在Qt中，许多Windows函数（例如SHGetKnownFolderPath出现无法解决的链接器错误

#include "pip.h"
#include "ui_pip.h"
#include <QFileDialog>
#include <QMessageBox>
#include <Objbase.h>
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <algorithm>
#include <QtNetwork/QHostAddress>
#include <shlobj.h>
#include <windows.h>
#include <Shlwapi.h>
#include <Knownfolders.h>

功能：

PWSTR appData = 0;

    if (SUCCEEDED(SHGetKnownFolderPath(FOLDERID_Desktop,
                                   0,
                                   NULL,
                                   &appData)))
{
    wcout << appData << endl;
}

链接器错误：

pip.obj : error LNK2019: unresolved external symbol _SHGetKnownFolderPath@16 
referenced in function "private: void __thiscall pip::on_submitButton_clicked(void)" 
(?on_submitButton_clicked@pip@@AAEXXZ)

我需要告诉QT Shell32.dll库在哪里还是shlobj.h东西？

Answer 1

您必须将项目链接到实现该符号的库 （ shell32.lib ）！

您应该在.PRO文件中添加以下内容：

LIBS += -L"C:\\Path\\Microsoft SDK\\Windows\\v7.1\\Lib" -lshell32