Qt当我尝试包括头文件时，没有这样的文件或词典 [英] QT No such file or dictionary when I try to include a header file

问题描述

这是Qt中非常常见的问题。包括头文件，然后出现错误。

No such file or directory

如何重现问题：

1. 首先我使用的是CAN Bus Open SAE J1939库

2. 然后，我像这样包括源和标头。

   SOURCES += 
    Communication/Database/databasehandling.cpp 
    Tool/Json/jsonhandling.cpp 
    main.cpp 
    Window/Main/mainwindow.cpp 
    Communication/USB/usb.cpp 
    Tool/CAN/Hardware/CAN_Network/CAN_Network.c 
    Tool/CAN/Hardware/Memory/FLASH_EEPROM_RAM_Memory.c 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/Auxiliary_Valve_Command.c 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/Auxiliary_Valve_Estimated_Flow.c 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/Auxiliary_Valve_Measured_Position.c 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/General_Purpose_Valve_Command.c 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/General_Purpose_Valve_Estimated_Flow.c 
    Tool/CAN/Open_SAE_J1939/Listen_For_Messages.c 
    Tool/CAN/SAE_J1939/SAE_J1939-21_Transport_Layer/Acknowledgement.c 
    Tool/CAN/SAE_J1939/SAE_J1939-21_Transport_Layer/Request.c 
    Tool/CAN/SAE_J1939/SAE_J1939-21_Transport_Layer/Transport_Protocol_Connection_Management.c 
    Tool/CAN/SAE_J1939/SAE_J1939-21_Transport_Layer/Transport_Protocol_Data_Transfer.c 
    Tool/CAN/SAE_J1939/SAE_J1939-71_Application_Layer/Request_Component_Identification.c 
    Tool/CAN/SAE_J1939/SAE_J1939-71_Application_Layer/Request_ECU_Identification.c 
    Tool/CAN/SAE_J1939/SAE_J1939-71_Application_Layer/Request_Software_Identification.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM1.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM2.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM3.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM14.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM15.c 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/DM16.c 
    Tool/CAN/SAE_J1939/SAE_J1939-81_Network_Management_Layer/Address_Claimed.c 
    Tool/CAN/SAE_J1939/SAE_J1939-81_Network_Management_Layer/Address_Delete.c 
    Tool/CAN/SAE_J1939/SAE_J1939-81_Network_Management_Layer/Address_Not_Claimed.c 
    Tool/CAN/SAE_J1939/SAE_J1939-81_Network_Management_Layer/Commanded_Address.c
   
   HEADERS += 
    Communication/Database/databasehandling.h 
    Tool/Json/jsonhandling.h 
    Window/Main/mainwindow.h 
    Communication/USB/usb.h 
    Tool/CAN/Hardware/CAN_Network/CAN_Network.h 
    Tool/CAN/Hardware/Memory/FLASH_EEPROM_RAM_Memory.h 
    Tool/CAN/Hardware/Processor_choice.h 
    Tool/CAN/ISO_11783/ISO_11783_Enums/Enum_Auxiliary_And_General_Purpose_Valves.h 
    Tool/CAN/ISO_11783/ISO_11783-7_Application_Layer/Application_Layer.h 
    Tool/CAN/Open_SAE_J1939/Open_SAE_J1939.h 
    Tool/CAN/Open_SAE_J1939/Structs.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_Control_Byte.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_DM1_DM2.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_DM14_DM15.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_Group_Function_Value.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_NAME.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_PGN.h 
    Tool/CAN/SAE_J1939/SAE_J1939_Enums/Enum_Send_Status.h 
    Tool/CAN/SAE_J1939/SAE_J1939-21_Transport_Layer/Transport_Layer.h 
    Tool/CAN/SAE_J1939/SAE_J1939-71_Application_Layer/Application_Layer.h 
    Tool/CAN/SAE_J1939/SAE_J1939-73_Diagnostics_Layer/Diagnostics_Layer.h 
    Tool/CAN/SAE_J1939/SAE_J1939-81_Network_Management_Layer/Network_Management_Layer.h
   

但我在Transport_Layer.h文件中仍收到一个错误

#ifndef SAE_J1939_21_TRANSPORT_LAYER_SAE_J1939_21_TRANSPORT_LAYER_H_
#define SAE_J1939_21_TRANSPORT_LAYER_SAE_J1939_21_TRANSPORT_LAYER_H_

/* Layers */
#include "../../Hardware/CAN_Network/CAN_Network.h"
#include "../../Open_SAE_J1939/Structs.h"
#include "../SAE_J1939-71_Application_Layer/Application_Layer.h"
#include "../SAE_J1939-73_Diagnostics_Layer/Diagnostics_Layer.h"
#include "../SAE_J1939-81_Network_Management_Layer/Network_Management_Layer.h" <--- This one
#include "../SAE_J1939_Enums/Enum_Control_Byte.h"
#include "../SAE_J1939_Enums/Enum_DM1_DM2.h"
#include "../SAE_J1939_Enums/Enum_DM14_DM15.h"
#include "../SAE_J1939_Enums/Enum_Group_Function_Value.h"
#include "../SAE_J1939_Enums/Enum_NAME.h"
#include "../SAE_J1939_Enums/Enum_PGN.h"
#include "../SAE_J1939_Enums/Enum_Send_Status.h"

和一个在Application_Layer.h文件中

#ifndef ISO_11783_ISO_11783_7_APPLICATION_LAYER_ISO_11783_7_APPLICATION_LAYER_H_
#define ISO_11783_ISO_11783_7_APPLICATION_LAYER_ISO_11783_7_APPLICATION_LAYER_H_

/* Layers */
#include "../../Hardware/CAN_Network/CAN_Network.h"
#include "../../ISO_11783/ISO_11783_Enums/Enum_Auxiliary_And_General_Purpose_Valves.h" <-- This one
#include "../../Open_SAE_J1939/Structs.h"
#include "../../SAE_J1939/SAE_J1939-21_Transport_Layer/Transport_Layer.h"
#include "../../SAE_J1939/SAE_J1939_Enums/Enum_PGN.h"

问题：

为什么会发生这种情况？ 我已经包括在内了。Qt Creator IDE会看到这些文件。这没什么问题。但是，编译器似乎不理解这些文件的存在。

我使用的是Qt 5.15.2和C++11。

推荐答案

我找到了适合我的解决方案。您不需要.pri文件，如此处的答案所示。扔掉它。

以下是我所做的。

1. 在Qt中右击您的项目。
2. 选择添加现有词典(&Q)
3. 标记要导入的词典。现在，您可以在.pro文件中看到许多.c和.h文件。

提示：不要使用../../，这可能会带来麻烦。改为使用项目路径，例如

"ThirdLibrary/OpenSAEJ1939/...your_h_files.h"

完成！

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