xcode在非Application路径安装插件

xcode因为硬盘的原因不能安装在系统Application里在其他路径安装插件提示Application里没有xcode提示:

xcrun: error: active developer path ("/Volumes/Xcode/Xcode.app/Contents/Developer") does not exist, use `xcode-select --switch path/to/Xcode.app` to specify the Xcode that you wish to use for command line developer tools (or see `man xcode-select`)

root执行下面命令ok:

xcode-select --switch /Volumes/MacDisk/Applications/Xcode.app