将std :: wstring转换为QString会引发链接器错误 [英] Conversion of std::wstring to QString throws linker error

问题描述

我需要将 std :: wstring 转换为 QString ，我尝试了最明显的方式

Hi I need to convert a std::wstring to QString and I tried the most obvious way of

std::wstring wideString;
QString qtString = QString::fromStdWString(wideString);

我遇到了错误：

错误2错误LNK2019：无法解析的外部符号" __ declspec（dllimport）public：静态类QString __cdecl QString :: fromStdWString（class std :: basic_string< wchar_t，struct std :: char_traits< wchar_t> ;, class std :::分配器< wchar_t> const&）" （__imp_？来自StdWString @ QString @@ SA？AV1 @ ABV？$ basic_string @ _WU？$ char_traits @ _W @ std @@ V？$ allocator @ _W @ 2 @@ std @@@ Z）

在函数中引用的公共：void __thiscall FileHandler :: deleteDir（class std :: basic_string< wchar_t，struct std :: char_traits< wchar_t> ;, class std :: allocator< wchar_t>>，int，unsigned int，bool，bool）" （？deleteDir @ FileHandler @@ QAEXAAV？$ basic_string @ _WU？$ char_traits @ _W @ std @@ V？$ allocator @ _W @ 2 @@ std @@ HI_N1 @ Z） filehandler.obj

referenced in function "public: void __thiscall FileHandler::deleteDir(class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >&,int,unsigned int,bool,bool)" (?deleteDir@FileHandler@@QAEXAAV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@HI_N1@Z) filehandler.obj

错误3致命错误LNK1120：1个未解决的外部文件C：\Users\Documents\Visual Studio 2008\Projects\product_dev\deletefiles\Debug\FileHandler.exe

Error 3 fatal error LNK1120: 1 unresolved externals C:\Users\Documents\Visual Studio 2008\Projects\product_dev\deletefiles\Debug\FileHandler.exe

我也尝试使用方法 QString :: fromWCharArray ：

qstring temp = QString::fromWCharArray(const_cast<wchar_t*>(wideString.c_str()),wideString.size());

我得到的错误是

错误2错误LNK2019：无法解析的外部符号" __ declspec（dllimport）public：static class QString __cdecl QString :: fromWCharArray（wchar_t const *，int）" （__imp_？fromWCharArray @ QString @@ SA？AV1 @ PB_WH @ Z）

在函数中引用的变量 public：void __thiscall FileHandler :: deleteDir（class std :: basic_string< wchar_t，struct std :: char_traits< wchar_t> ;, class std :: allocator< wchar_t>&&，int，unsigned int，bool，bool）" （？deleteDir @ FileHandler @@ QAEXAAV？$ basic_string @ _WU？$ char_traits @ _W @ std @@ V？$ allocator @ _W @ 2 @@ std @@ HI_N1 @ Z） filehandler.obj

referenced in function "public: void __thiscall FileHandler::deleteDir(class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >&,int,unsigned int,bool,bool)" (?deleteDir@FileHandler@@QAEXAAV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@HI_N1@Z) filehandler.obj

错误3致命错误LNK1120：1未解决的外部C：CUsers\Documents\Visual Studio 2008\Projects\product_dev\deletefiles\Debug\FileHandler.exe 1

Error 3 fatal error LNK1120: 1 unresolved externals C:\Users\Documents\Visual Studio 2008\Projects\product_dev\deletefiles\Debug\FileHandler.exe 1

如何继续解决此问题？

推荐答案

编辑Visual Studio项目设置，并在 C / C ++->语言下将选项 Treat wchar_t was Built-in Type 设置为否

Edit your Visual Studio project settings and under C/C++ -> Language set the option Treat wchar_t was Built-in Type to No.

这篇关于将std :: wstring转换为QString会引发链接器错误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！