c++ - 无法从 'std::vector<_Ty>' 转换为 'std::vector<_Ty> &

Question

你好，我有两个问题:

1. cannot convert from 'std::vector<_Ty>' to 'std::vector<_Ty> &

   void CMapObjectPropertyPageAmbience::OnUpdateUI(CProperty* pProperty)
   {
       prt::PropertyAmbienceStringToData(pProperty, &m_propertyAmbience);
   
       std::vector<CFilename>& rSoundFileNameVector = m_propertyAmbience.AmbienceSoundVector;
       for (DWORD dwIndex = 0; dwIndex < rSoundFileNameVector.size(); ++dwIndex)
       {
           m_ctrlSoundFileList.InsertString(dwIndex, rSoundFileNameVector[dwIndex].c_str());
       }
   
       m_ctrlPlayType.SelectString(-1, m_propertyAmbience.strPlayType.c_str());
   
       SetDialogFloatText(GetSafeHwnd(), IDC_MAP_OBJECT_PROPERTY_AMBIENCE_INTERVAL, m_propertyAmbience.fPlayInterval);
       SetDialogFloatText(GetSafeHwnd(), IDC_MAP_OBJECT_PROPERTY_AMBIENCE_INTERVAL_VARIATION, m_propertyAmbience.fPlayIntervalVariation);
       SetDialogFloatText(GetSafeHwnd(), IDC_MAP_OBJECT_PROPERTY_AMBIENCE_MAX_VOLUME_AREA_PERCENTAGE, m_propertyAmbience.fMaxVolumeAreaPercentage * 100.0f);
   
       OnUpdatePropertyData(m_propertyAmbience.strName.c_str());
       OnChangePlayType();
   }
   

   错误出现在:

   std::vector<CFilename>& rSoundFileNameVector = m_propertyAmbience.AmbienceSoundVector;
   

2. 两个重载都不能转换所有参数类型:

   void CMapObjectPropertyPageAmbience::OnDeleteSoundFile()
   {
       DWORD dwCurSel = DWORD(m_ctrlSoundFileList.GetCurSel());
       if (dwCurSel >= m_propertyAmbience.AmbienceSoundVector.size())
           return;
   
       DeleteVectorItem < CFilename > ( & m_propertyAmbience.AmbienceSoundVector, dwCurSel);
       m_ctrlSoundFileList.DeleteString(dwCurSel);
   }
   

   在 DeleteVectorItem<CFilename>(&m_propertyAmbience.AmbienceSoundVector, dwCurSel);

全部错误

1>Dialog\MapObjectPropertyPageAmbience.cpp(78): error C2440: 'initializing' : cannot convert from 'std::vector<_Ty>' to 'std::vector<_Ty> &'
1>          with
1>          [
1>              _Ty=std::string
1>          ]
1>          and
1>          [
1>              _Ty=CFilename
1>          ]
1>Dialog\MapObjectPropertyPageAmbience.cpp(205): error C2665: 'DeleteVectorItem' : none of the 2 overloads could convert all the argument types
1>          d:\dev\kraizy\novaline\srcs\client\eterpack\../eterBase/Stl.h(146): could be 'void DeleteVectorItem<CFilename>(std::vector<_Ty> *,unsigned long)'
1>          with
1>          [
1>              _Ty=CFilename
1>          ]
1>          d:\dev\kraizy\novaline\srcs\client\eterpack\../eterBase/Stl.h(191): or       'void DeleteVectorItem<CFilename>(std::vector<_Ty> *,T)'
1>          with
1>          [
1>              _Ty=CFilename,
1>              T=CFilename
1>          ]
1>          while trying to match the argument list '(std::vector<_Ty> *, DWORD)'
1>          with
1>          [
1>              _Ty=std::string
1>          ]

Answer 1

您正在尝试使用 vector<string>在vector<CFilename>的地方是期待。这些是完全不相关的类型。