====================[ 构建 | show | Debug ]======================================= /snap/clion/326/bin/cmake/linux/x64/bin/cmake --build /home/sfx233/yinyou/src/answer/cmake-build-debug --target show -j 22 [1/2] Building CXX object CMakeFiles/show.dir/src/show.cpp.o FAILED: CMakeFiles/show.dir/src/show.cpp.o /usr/bin/c++ -DDEFAULT_RMW_IMPLEMENTATION=rmw_fastrtps_cpp -DRCUTILS_ENABLE_FAULT_INJECTION -isystem /opt/ros/humble/include/rclcpp -isystem /opt/ros/humble/include/sensor_msgs -isystem /opt/ros/humble/include/cv_bridge -isystem /usr/include/opencv4 -isystem /opt/ros/humble/include/ament_index_cpp -isystem /opt/ros/humble/include/libstatistics_collector -isystem /opt/ros/humble/include/builtin_interfaces -isystem /opt/ros/humble/include/rosidl_runtime_c -isystem /opt/ros/humble/include/rcutils -isystem /opt/ros/humble/include/rosidl_typesupport_interface -isystem /opt/ros/humble/include/fastcdr -isystem /opt/ros/humble/include/rosidl_runtime_cpp -isystem /opt/ros/humble/include/rosidl_typesupport_fastrtps_cpp -isystem /opt/ros/humble/include/rmw -isystem /opt/ros/humble/include/rosidl_typesupport_fastrtps_c -isystem /opt/ros/humble/include/rosidl_typesupport_introspection_c -isystem /opt/ros/humble/include/rosidl_typesupport_introspection_cpp -isystem /opt/ros/humble/include/rcl -isystem /opt/ros/humble/include/rcl_interfaces -isystem /opt/ros/humble/include/rcl_logging_interface -isystem /opt/ros/humble/include/rcl_yaml_param_parser -isystem /opt/ros/humble/include/libyaml_vendor -isystem /opt/ros/humble/include/tracetools -isystem /opt/ros/humble/include/rcpputils -isystem /opt/ros/humble/include/statistics_msgs -isystem /opt/ros/humble/include/rosgraph_msgs -isystem /opt/ros/humble/include/rosidl_typesupport_cpp -isystem /opt/ros/humble/include/rosidl_typesupport_c -isystem /opt/ros/humble/include/geometry_msgs -isystem /opt/ros/humble/include/std_msgs -g -fdiagnostics-color=always -MD -MT CMakeFiles/show.dir/src/show.cpp.o -MF CMakeFiles/show.dir/src/show.cpp.o.d -o CMakeFiles/show.dir/src/show.cpp.o -c /home/sfx233/yinyou/src/answer/src/show.cpp /home/sfx233/yinyou/src/answer/src/show.cpp: In constructor ‘picture_show::picture_show()’: /home/sfx233/yinyou/src/answer/src/show.cpp:14:109: error: no matching function for call to ‘picture_show::image_callback()’ 14 | std::bind(&picture_show::image_callback(), this, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~ /home/sfx233/yinyou/src/answer/src/show.cpp:19:13: note: candidate: ‘void picture_show::image_callback(sensor_msgs::msg::Image_<std::allocator<void> >::SharedPtr)’ 19 | void image_callback(const sensor_msgs::msg::Image::SharedPtr msg) { | ^~~~~~~~~~~~~~ /home/sfx233/yinyou/src/answer/src/show.cpp:19:13: note: candidate expects 1 argument, 0 provided /home/sfx233/yinyou/src/answer/src/show.cpp: In member function ‘void picture_show::image_callback(sensor_msgs::msg::Image_<std::allocator<void> >::SharedPtr)’: /home/sfx233/yinyou/src/answer/src/show.cpp:27:16: error: expected primary-expression before ‘catch’ 27 | }catch (const cv_bridge::Exception& e){ | ^~~~~ /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: error: expected ‘catch’ before ‘;’ token 30 | }; | ^ /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: error: expected ‘(’ before ‘;’ token /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: error: expected type-specifier before ‘;’ token /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: error: expected ‘)’ before ‘;’ token /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: note: to match this ‘(’ /home/sfx233/yinyou/src/answer/src/show.cpp:30:12: error: expected ‘{’ before ‘;’ token ninja: build stopped: subcommand failed.
时间: 2025-03-12 10:02:16 浏览: 70
<think>嗯,用户遇到了一个CMake编译错误,需要帮忙解决。首先,我得仔细看看错误信息。编译失败是在构建show.cpp.o的时候,主要有两个错误:
第一个错误是在picture_show的构造函数里,调用image_callback时没有匹配的函数。错误提示说image_callback需要一个参数,但这里用了0个参数。看代码,构造函数里用了std::bind(&picture_show::image_callback(), this),这里应该是成员函数指针,但用户可能漏掉了参数或者没有正确绑定。正确的做法应该是在bind的时候,使用&picture_show::image_callback,而不是image_callback(),而且可能需要使用占位符来表示参数。
第二个错误是在image_callback函数里的try-catch块。错误提示在catch前面缺少了primary-expression,可能代码里的花括号没有正确闭合。检查代码,发现可能是try块后面的}catch的语法错误,或者缺少了try的大括号闭合。例如,用户可能在try后面没有正确写作用域,导致catch无法正确匹配。
接下来,我需要一步步分析可能的修正方法。对于第一个错误,构造函数中的std::bind应该正确绑定成员函数,并且传递占位符表示参数。例如,应该使用std::bind(&picture_show::image_callback, this, std::placeholders::_1),这样当消息到来时,回调函数才能正确接收参数。
对于第二个错误,检查try-catch的结构是否正确。用户可能在try块后面直接写了catch,但可能漏掉了花括号,或者catch的语法有误。正确的结构应该是:
try {
// 代码
} catch (const cv_bridge::Exception& e) {
// 处理异常
}
需要确保try块中的代码用大括号括起来,并且catch紧跟在后面,中间没有多余的符号。
另外,用户可能在代码中某些地方使用了中文标点或者格式错误,导致编译器报错。比如分号或括号是否匹配,或者某些语句结束缺少分号。
总结下来,修正步骤应该是:
1. 在std::bind中修正函数指针,去掉括号,并添加占位符。
2. 检查try-catch块的结构,确保语法正确,花括号正确闭合。
3. 检查是否有其他语法错误,比如缺少分号或括号不匹配。
最后,建议用户修改代码后重新编译,并关注是否还有其他错误出现。如果问题依旧,可能需要检查相关的头文件引用和依赖是否正确安装,比如OpenCV和ROS2的相关库是否配置正确。</think>根据你提供的编译错误信息,我们可以分步骤分析问题和解决方案:
==================== 错误分析及解决方案 ====================
一、回调函数绑定错误
```
error: no matching function for call to 'picture_show::image_callback()'
std::bind(&picture_show::image_callback(), this
```
原因分析:
1. 使用`std::bind`时函数指针语法错误
2. 缺少参数占位符
3. 成员函数调用方式不正确
修正方案:
```cpp
// 原错误代码
std::bind(&picture_show::image_callback(), this)
// 修改为
std::bind(&picture_show::image_callback, this, std::placeholders::_1)
```
二、try-catch语法错误
```
error: expected primary-expression before 'catch'
}catch (const cv_bridge::Exception& e){
```
原因分析:
1. `try`代码块的大括号闭合不正确
2. `try-catch`结构格式错误
修正方案:
```cpp
// 原错误代码
try {
// 转换代码
}catch (const cv_bridge::Exception& e){
// 异常处理
};
// 修改为
try {
// 转换代码
} catch (const cv_bridge::Exception& e) {
// 异常处理
} // 注意此处不需要分号
```
三、完整代码示例修正
```cpp
// 构造函数修正
picture_show::picture_show() : Node("image_viewer") {
subscription_ = this->create_subscription<sensor_msgs::msg::Image>(
"image_topic", 10,
std::bind(&picture_show::image_callback, this, std::placeholders::_1));
}
// 回调函数修正
void image_callback(const sensor_msgs::msg::Image::SharedPtr msg) {
try {
cv::Mat frame = cv_bridge::toCvCopy(msg, "bgr8")->image;
cv::imshow("Camera", frame);
cv::waitKey(1);
} catch (const cv_bridge::Exception& e) {
RCLCPP_ERROR(this->get_logger(), "cv_bridge exception: %s", e.what());
}
}
```
四、附加检查建议
1. 确认头文件包含:
```cpp
#include <opencv2/highgui/highgui.hpp>
#include <cv_bridge/cv_bridge.h>
```
2. 检查CMakeLists.txt中依赖项:
```cmake
find_package(OpenCV REQUIRED)
find_package(cv_bridge REQUIRED)
```
五、重新编译命令
```bash
cd /home/sfx233/yinyou/src/answer/cmake-build-debug
cmake --build . --target show -j 22
```
建议按照以上步骤修改后重新编译。如果仍有问题,可以提供完整的`show.cpp`文件内容以便进一步分析。
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