ros rqt打开失败(failed to start because it could not find or load the Qt platform plugin “xcb” in “”)

问题解决如下:

1. export QT_DEBUG_PLUGINS=1 将这行代码添加到~/.bashrc中;

sudo gedit ~/.bashrc

source ~/.bashrc

2.再次运行rqt,显示出了比较详细的日志,查看有说/usr/bin/platforms/libxcb.so找不到,打开对应的文件夹,发现里面有文件,可能版本不对吧,正好

我装的有qt,在qt中搜索到/home/ubuntu/Qt5.9.4/5.9.4/gcc_64/plugins/platforms下面的文件全部替换到/usr/bin/platforms里面

cd /usr/bin/platforms

sudo rm *.so

sudo scp /home/ubuntu/Qt5.9.4/5.9.4/gcc_64/plugins/platforms/* ./

sudo chmod -R 777 *

3.重启,然后运行rqt就可以了.