QT 当我尝试包含头文件时没有这样的文件或字典

Question

这是 QT 中非常常见的问题。包含头文件然后报错。

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. 然后我像这样包含源和标题。

   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
   

但我仍然在Transport_Layer.h 文件中遇到一个错误

#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"

还有一个在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：

为什么会这样？ 我已经包括在内。 QT Creator IDE 会看到这些文件。那里没问题。但是，编译器似乎不理解这些文件的存在。

我正在使用 QT 5.15.2 和 C++11。

Answer 1

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。摆脱它。

这是我所做的。

1. 在 QT 中右键单击您的项目。
2. 选择“添加现有词典”
3. 标记要导入的词典。现在您会在 .pro 文件中看到很多 .c 和 .h 文件。

提示：不要使用../../，这会引起麻烦。而是使用项目路径，例如

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

完成！

Answer 2

由于 OP 提供的信息很少，我无法指出错误的原因，但是当我将第三方库添加到我的项目时，最好创建一个包含链接所需内容的 .pri该项目。在这种情况下：

├── 3rdParty
│   └── OpenSAEJ1939
│       ├── Hardware
│       ├── ISO_11783
│       ├── LICENSE
│       ├── Open_SAE_J1939
│       ├── OpenSAEJ1939.pri
│       └── SAE_J1939
├── 68795702.pro
└── main.cpp

*.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp

include(3rdParty/OpenSAEJ1939/OpenSAEJ1939.pri)

OpenSAEJ1939.pri

INCLUDEPATH += $$PWD

ma​​in.cpp

#include <QApplication>
#include <QWidget>

#include <ISO_11783/ISO_11783-7_Application_Layer/Application_Layer.h>
#include <Open_SAE_J1939/Open_SAE_J1939.h>
#include <SAE_J1939/SAE_J1939-71_Application_Layer/Application_Layer.h>
#include <SAE_J1939/SAE_J1939-73_Diagnostics_Layer/Diagnostics_Layer.h>
#include <SAE_J1939/SAE_J1939-81_Network_Management_Layer/Network_Management_Layer.h>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    /* Create our J1939 structure with two ECU */
    J1939 j1939_1 = {0};
    J1939 j1939_2 = {0};

    /* Important to sent all non-address to 0xFF - Else we cannot use ECU address 0x0 */
    for(uint8_t i = 0; i < 255; i++){
        j1939_1.other_ECU_address[i] = 0xFF; /* 0xFF is the broadcast address */
        j1939_2.other_ECU_address[i] = 0xFF;
    }

    /* Set the ECU address */
    j1939_1.this_ECU_address = 0x80;                                                /* From 0 to 253 because 254 = error address and 255 = broadcast address */
    j1939_2.this_ECU_address = 0x90;

    QWidget widget;
    widget.show();
    return a.exec();
}

_{你可以找到完整的演示here。}