问题：在vs开发工具中集成qt插件，出现以下情况
The following error occurred:
These Qt version are inaccessible:
5.9.2_msvc2015 in
Make sure that you have read access to all files in your Qt directories
出现这种情况，有可能是有重装过qt，qt的安装目录有所改变。
解决：
指定QTDIT环境变量
The following error occurred:
These Qt version are inaccessible:
5.9.2_msvc2015 in
Make sure that you have read access to all files in your Qt directories
出现这种情况，有可能是有重装过qt，qt的安装目录有所改变。
指定QTDIT环境变量
