linux - Qt5 linux如何设置窗口图标图片

Question

我有一个 UI，我在 Qt 设计器中设计并用 C++ 编写了代码。我正在使用 catkin ，这只是 cmake，用于构建我的项目。目前当程序启动时，应用程序图标看起来像，.我想让它成为我指定的图像，但一直无法弄清楚如何让它工作。

我的项目目录结构如下所示

package
|--CMakeLists.txt
|--src
    |--main.cpp 
    |--MainWindow.cpp
    |--resources
       |--images
           |--kitty.png
       |--icons.qrc
|--include
    |--MainWindow.hpp
|--ui
    |--MainWindow.ui

我的 CMakeLists.txt 文件看起来像，

cmake_minimum_required(VERSION 2.8.7)
project(shared_memory_transport_sliderboard)

find_package(catkin REQUIRED)

find_package(Qt5Widgets REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}     ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")
add_definitions(${Qt5Widgets_DEFINITIONS})

set(INCLUDES_DIR ${PROJECT_SOURCE_DIR}/include)
set(SOURCES_DIR ${PROJECT_SOURCE_DIR}/src)

catkin_package(
INCLUDE_DIRS ${INCLUDES_DIR}
DEPENDS Qt5Widgets
)

# c++11
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
if(COMPILER_SUPPORTS_CXX0X)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
    message(FATAL_ERROR "The compiler ${CMAKE_CXX_COMPILER} has no     C++0x support. Please use a different C++ compiler.")
endif()

include_directories(
${CMAKE_CURRENT_BINARY_DIR}
${INCLUDES_DIR}
${catkin_INCLUDE_DIRS}
${Qt5Widgets_INCLUDE_DIRS}
)

set(QT_FORMS
ui/MainWindow.ui
)
set(QT_MOC 
    ${INCLUDES_DIR}/${PROJECT_NAME}/MainWindow.h
)
set(QT_SOURCES
    src/MainWindow.cpp
)

qt5_wrap_cpp(QT_MOC_HPP ${QT_MOC})
qt5_wrap_ui(QT_FORMS_HPP ${QT_FORMS})
qt5_add_resources(ui_resources ${PROJECT_SOURCE_DIR}/resources/icons.qrc)

add_executable(smt_sliderboard src/main.cpp ${QT_SOURCES}   ${QT_MOC_HPP} ${QT_FORMS_HPP} ${ui_resources})

target_link_libraries(smt_sliderboard ${catkin_LIBRARIES} Qt5::Widgets)

install(TARGETS smt_sliderboard
  ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
  LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
  RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
)

install(DIRECTORY include/${PROJECT_NAME}/
    DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
    FILES_MATCHING PATTERN "*.h")

编译我的代码时，编译器会生成一个 qrc_icons.cpp.o 对象，但是当我运行可执行文件时，该图标不会显示。我的 icons.qrc 文件看起来像，

<!DOCTYPE RCC>
<RCC version="1.0">
    <qresource prefix="/Icons">
        <file alias="kitty">images/kitty.jpg</file>
    </qresource>
</RCC>

我还尝试在 MainWindow.h 中添加以下内容，

QApplication myApp(argc, argv);
QIcon appIcon;
appIcon.addFile(":/Icons/kitty");
myApp.setWindowIcon(appIcon);

这编译得很好，但仍然没有图标。感觉我已经尝试了所有方法都没有运气，感谢您的帮助!

Answer 1

来自Qt Resource System文档:

Note that the listed resource files must be located in the same directory as the .qrc file, or one of its subdirectories.

所以你需要一个像这样的目录结构:

|--images
    |--images
       |--kitty.png
    |--icons.qrc

更新:

您还应该咨询Setting the Application Icon在 Qt 文档中确保您处理任何特定于平台的问题。