cmake 和 Qt 沸腾板,无法初始化类型为"QMainWindow *"错误的参数

cmake and Qt boilderplate, cannot initialize a parameter of type 'QMainWindow *' error

本文关键字:QMainWindow 错误 参数 类型 初始化 沸腾 Qt cmake      更新时间:2023-10-16

im试图使用cmake构建一个样板c++应用程序,该应用程序在名为main_window.xml的.ui文件中定义了一个主窗口。我遵循了一些教程,并试图拼凑出一种方法,但我的知识充其量是不完整的,我遇到了一个不知道如何修复的错误。

有人知道我哪里出了问题,或者我是否选对了树。

这是主.cpp

#include <QApplication>
#include "ui_main_window.h"
int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QWidget *widget = new QWidget;
     Ui::MainWindow ui;
     ui.setupUi(widget);
     widget->show();
     return app.exec();
 }

这是CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
PROJECT(test_proj)
FIND_PACKAGE(Qt4 REQUIRED)
# include the current binary output directory as thats where the intermediate Qt fiels will be placed
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
INCLUDE(${QT_USE_FILE})
ADD_DEFINITIONS(${QT_DEFINITIONS})
# set sources of program
# only files that need preprocessgin by Qt need be included
SET(test_proj_SOURCES main.cpp)
SET(test_proj_HEADERS ui_main_window.h)
SET(test_proj_FORMS main_window.ui)
# this block creates .cpp and .h files from the .ui files
QT4_WRAP_CPP(test_proj_HEADERS_MOC ${test_proj_HEADERS})
QT4_WRAP_UI(test_proj_FORMS_HEADERS ${test_proj_FORMS})
# QT4_ADD_RESOURCES(test_proj_RESOURCES_RCC ${test_proj_RESOURCES})

ADD_EXECUTABLE(test_proj ${test_proj_SOURCES} 
                          ${test_proj_HEADERS}
                          ${test_proj_FORMS})
TARGET_LINK_LIBRARIES(test_proj ${QT_LIBRARIES})

这是我得到的编译错误

Jonathans-MacBook-Pro:build jonathantopf$ make clean;make
[ 50%] Generating ui_main_window.h
Scanning dependencies of target laser_scan
[100%] Building CXX object CMakeFiles/laser_scan.dir/main.cpp.o
/projects/laser_scanner/src/main.cpp:49:17: error: cannot initialize a parameter of type 'QMainWindow *' with an lvalue of type
      'QWidget *'
     ui.setupUi(widget);
                ^~~~~~
/projects/laser_scanner/build/ui_main_window.h:48:31: note: passing argument to parameter 'MainWindow' here
    void setupUi(QMainWindow *MainWindow)
                              ^
1 error generated.
make[2]: *** [CMakeFiles/laser_scan.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/laser_scan.dir/all] Error 2
make: *** [all] Error 2
Jonathans-MacBook-Pro:build jonathantopf$ 

您的主窗口是从QMainWindow继承的,因此您应该在主函数中将QWidget替换为QMainWindow

然而,有一个没有表单类的表单是不寻常的。我建议您在QtCreator中使用"添加新的-Qt-Designer表单类"来创建一个类。