安装iai-kinect2与ERROR: the following packages/stacks could not have their rosdep keys resolved to ..

参考博客：https://blog.csdn.net/wuguangbin1230/article/details/77184032 点击打开链接

                    https://answers.ros.org/question/237451/run-rosdep-install-r-from-paths-error-when-i-install-iai_kinect2/点击 打开链接

在安装iai-kinect2操作这一步"rosdep install  -r --from-paths  ."出现了问题，错误如下：

lzm@lzm-pc:~/catkin_ws/src/iai_kinect2$ rosdep install -r --from-paths .ERROR: the following packages/stacks could not have their rosdep keys resolvedto system dependencies:kinect2_viewer: Cannot locate rosdep definition for [kinect2_bridge]kinect2_calibration: Cannot locate rosdep definition for [kinect2_bridge]kinect2_bridge: Cannot locate rosdep definition for [kinect2_registration]Continuing to install resolvable dependencies...All required rosdeps installed successfully

将命令改写为这个：

$ rosdep install --from-paths ~/catkin_ws/src/iai_kinect2 --ignore-src -r All required rosdeps installed successfully 

然后就可以解决问题了。

实在不行那就打开终端重新执行安装步骤，可能是误操作命令没输入全面导致的。