我试图将cmake与使用QApplication的Qt项目之一链接。
构建项目时出现此错误
Cannot open include file: 'QApplication': No such file or directory
我只在我的.cpp文件中使用QApplication和QWebEngineWidget,而在头文件中使用QDir
主文件
#ifndef MAIN_H
#define MAIN_H
#include <QDir>
QUrl getlink(){
QUrl url = QUrl::fromLocalFile(QDir::currentPath();
return url;
}
#endif // MAIN_H
main.cpp
#include <QApplication>
#include <QWebEngineView>
#include "main.h"
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QApplication app(argc, argv);
QWebEngineView view;
view.setUrl(getlink());
view.resize(1524, 850);
view.show();
return app.exec();
}
这是我的CMake文件中用于此应用程序的代码
if (ENABLE_QT_SimApp_GUI)
find_package(qtlibs)
find_package(SimApp)
if (NOT SimApp_FOUND)
message(FATAL_ERROR "Could not find SimApp")
endif(NOT SimApp_FOUND)
set(CMAKE_PREFIX_PATH ${PREFIX_PATH})
message(STATUS "CMAKE_PREFIX_PATH" ${CMAKE_PREFIX_PATH})
find_package(Qt5 REQUIRED COMPONENTS Widgets Core Gui Sql PrintSupport WebEngineWidgets)
qt5_wrap_cpp(QtSimAppProjectLib_hdr_moc ${QtSimAppProjectLib_hdr})
qt5_wrap_ui(QtSimAppProjectLib_ui_uic ${QtSimAppProjectLib_ui})
qt5_add_resources(QtSimAppProjectLib_qrc_rcc ${QtSimAppProjectLib_qrc})
include_directories (${PROJECT_SOURCE_DIR})
include_directories (${PROJECT_BINARY_DIR})
add_library (QtSimAppProjectLib STATIC ${QtSimAppProjectLib_src} ${QtSASQProjectLib_hdr_moc} ${QtSASQProjectLib_ui_uic})
target_link_libraries (QtSimAppProjectLib
Qt5::Core
Qt5::Gui
Qt5::Widgets
Qt5::Sql
Qt5::PrintSupport
Qt5::WebEngineWidgets)
#WIN32 to suppress the console window under Windows
add_executable(SIM_APP WIN32 ${QtSimAppProjectLib_src} ${QtSimAppProjectLib_qrc_rcc})
if (ENABLE_COPY_QT_LIBS AND WIN32)
find_package(qtdlls)
endif(ENABLE_COPY_QT_LIBS AND WIN32)
endif (ENABLE_QT_SimApp_GUI)
我知道我可能不需要其他链接的库,但我将它们保留在那里以备将来开发。
无论如何,当我在目标链接中为QWebEngineView添加Qt5 :: WebEngineWidget时,它工作正常,但是当我为QApplication添加Qt5 :: Widgets时,它似乎无法找到该文件,我也不知道为什么。
有什么问题的想法吗?
最佳答案
如@vre的注释中所述,您实际上从未将GUI应用程序链接到Qt5
。以下是您发布的CMakeLists.txt
的固定版本
if (ENABLE_QT_SimApp_GUI)
find_package(qtlibs)
find_package(SimApp)
if (NOT SimApp_FOUND)
message(FATAL_ERROR "Could not find SimApp")
endif(NOT SimApp_FOUND)
set(CMAKE_PREFIX_PATH ${PREFIX_PATH})
message(STATUS "CMAKE_PREFIX_PATH" ${CMAKE_PREFIX_PATH})
find_package(Qt5 REQUIRED COMPONENTS Widgets Core Gui Sql PrintSupport WebEngineWidgets)
qt5_wrap_cpp(QtSimAppProjectLib_hdr_moc ${QtSimAppProjectLib_hdr})
qt5_wrap_ui(QtSimAppProjectLib_ui_uic ${QtSimAppProjectLib_ui})
qt5_add_resources(QtSimAppProjectLib_qrc_rcc ${QtSimAppProjectLib_qrc})
include_directories (${PROJECT_SOURCE_DIR})
include_directories (${PROJECT_BINARY_DIR})
add_library (QtSimAppProjectLib STATIC ${QtSimAppProjectLib_src} ${QtSASQProjectLib_hdr_moc} ${QtSASQProjectLib_ui_uic})
target_link_libraries (QtSimAppProjectLib
Qt5::Core
Qt5::Gui
Qt5::Widgets
Qt5::Sql
Qt5::PrintSupport
Qt5::WebEngineWidgets)
#WIN32 to suppress the console window under Windows
add_executable(SIM_APP WIN32 ${QtSimAppProjectLib_src} ${QtSimAppProjectLib_qrc_rcc})
# use one of the following target_link_libraries() calls
target_link_libraries(SIM_APP Qt5::Core Qt5::Gui Qt5::Widgets)
# target_link_libraries(SIM_APP QtSimAppProjectLib)
if (ENABLE_COPY_QT_LIBS AND WIN32)
find_package(qtdlls)
endif(ENABLE_COPY_QT_LIBS AND WIN32)
endif (ENABLE_QT_SimApp_GUI)
关于c++ - Qt5和Cmake链接QApplication header 错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/49377527/