xcrun: error: unable to find uti

终端调用XCode时，偶尔会出现下列错误。

```

- ERROR | [iOS] unknown: Encountered an unknown error (/usr/bin/xcrun simctl list -j devices

xcrun: error: unable to find utility "simctl", not a developer tool or in PATH

) during validation.

```

错误的原因是XCode未设置Command line tools，解决方法就是在`XCode` -> `Preferences...` -> `Locations`中设置Command line tools。