Question

我试图使用cmake构建一个样板c ++应用程序，其中一个主窗口定义在一个名为main_window.xml的.ui文件中。我已经按照一些教程并试图拼凑一个方法，但我的知识充其量是补丁，我遇到了一个我不知道如何解决的错误。

有没有人知道我哪里出错了，或者我甚至吠叫了正确的树。

继承main.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$

Answer 1

您的主窗口继承自QMainWindow，因此您应将QWidget替换为主要功能中的QMainWindow。

然而，没有表单类的表单是不寻常的。我建议你在Qt Creator中使用“Add new - Qt - Designer Form Class”来创建一个类。

cmake和Qt boilderplate，无法初始化'QMainWindow *'类型错误的参数

1 个答案: