[FishBot教程]7. FishBot-Nav2导航测试

[guoxiaoqing2350]

@小鱼 谢谢小鱼，已经解决了

[2934775495]

@小鱼 这个一键安装后的rosdepc还是需要初始化，但是我初始化的时候显示

[2934775495]

@2934775495这样该怎么解决呢

[2934775495]

鱼哥，我第三步会出现这种问题，是怎么回事啊

[小鱼]

@2934775495 sudo apt install ros-humble-joint-state-publisher

[2934775495]

@小鱼 已经解决了，但是后面启动导航出问题了，我改了.py文件的内容出现这个问题，我是在VScode里面打开一个终端进行colcon build的，不知道为什么不可以

[2934775495]

@2934775495

又试了一遍，现在是这样子

[2916186745]

明明有文件，为什么找不到包呢？

[2934775495]

@2916186745 不知道啊，很奇怪

[小鱼]

@2916186745 目录搞错了，你应该在工作空间下构建和source

[515261725]

此回复已被删除！

[1449262967]

@2496480233 看看路径里是不是有中文

[2934775495]

鱼哥，我这边跑导航测试那一步ros2 launch fishbot_navigation2 navigation2.launch.py的时候会出现这个问题，要怎么解决呢？

[小鱼]

@2934775495 按照要求，单独发帖提问下

[liao_03]

@2934775495 我也有同样的问题

[2406291085]

请问进行导航的时候 地图变成这个样子是怎么回事 怎么解决

[sexysmile]

@1032063747 什么一键安装？我也卡在这里了，请问可以分享一下处理办法吗？

[1578752813]

@小鱼 在 [FishBot教程]7. FishBot-Nav2导航测试 中说：

ros2 launch fishbot_bringup fishbot_bringup.launch.py

eepdriving@deepdriving:~/fishbot$ ros2 launch fishbot_bringup fishbot_bringup.launch.py
[INFO] [launch]: All log files can be found below /home/deepdriving/.ros/log/2024-05-11-15-55-53-146433-deepdriving-1888666
[INFO] [launch]: Default logging verbosity is set to INFO
Task exception was never retrieved
future: <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:226> exception=PackageNotFoundError("package 'joint_state_publisher' not found, searching: ['/home/deepdriving/fishbot/install/fishbot_navigation2', '/home/deepdriving/fishbot/install/fishbot_interfaces', '/home/deepdriving/fishbot/install/fishbot_description', '/home/deepdriving/fishbot/install/fishbot_cartographer', '/home/deepdriving/fishbot/install/fishbot_bringup', '/opt/ros/foxy']")>
Traceback (most recent call last):
  File "/opt/ros/foxy/lib/python3.8/site-packages/ament_index_python/packages.py", line 50, in get_package_prefix
    content, package_prefix = get_resource('packages', package_name)
  File "/opt/ros/foxy/lib/python3.8/site-packages/ament_index_python/resources.py", line 48, in get_resource
    raise LookupError(
LookupError: Could not find the resource 'joint_state_publisher' of type 'packages'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 228, in _process_one_event
    await self.__process_event(next_event)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 248, in __process_event
    visit_all_entities_and_collect_futures(entity, self.__context))
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  [Previous line repeated 1 more time]
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 38, in visit_all_entities_and_collect_futures
    sub_entities = entity.visit(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit
    return self.execute(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/actions/node.py", line 453, in execute
    ret = super().execute(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 823, in execute
    self.__expand_substitutions(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 668, in __expand_substitutions
    cmd = [perform_substitutions(context, x) for x in self.__cmd]
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 668, in <listcomp>
    cmd = [perform_substitutions(context, x) for x in self.__cmd]
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in perform_substitutions
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in <listcomp>
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_context.py", line 232, in perform_substitution
    return substitution.perform(self)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/substitutions/executable_in_package.py", line 76, in perform
    package_prefix = super().perform(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/substitutions/find_package.py", line 79, in perform
    result = self.find(package)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/substitutions/find_package.py", line 96, in find
    return get_package_prefix(package_name)
  File "/opt/ros/foxy/lib/python3.8/site-packages/ament_index_python/packages.py", line 52, in get_package_prefix
    raise PackageNotFoundError(
ament_index_python.packages.PackageNotFoundError: "package 'joint_state_publisher' not found, searching: ['/home/deepdriving/fishbot/install/fishbot_navigation2', '/home/deepdriving/fishbot/install/fishbot_interfaces', '/home/deepdriving/fishbot/install/fishbot_description', '/home/deepdriving/fishbot/install/fishbot_cartographer', '/home/deepdriving/fishbot/install/fishbot_bringup', '/opt/ros/foxy']"

[小鱼]

@1578752813 1.请使用ubuntu22.04 系统 2.请安装 joint_state_publisher

[1006076811]

@小鱼 在 [FishBot教程]7. FishBot-Nav2导航测试 中说：

rosdep install --from-paths src --ignore-src -y -r

使用foxy版本的ros2的话，git clone 之后，记得要git checkout foxy，切换到对应分支，否则安装依赖时会有部分安装不上。