如果你已经安装了XCode，你所要做的就是…

打开XCode 去Xcode >首选项>位置 从命令行工具选择你的XCode

我无需安装完整的Xcode应用程序就可以解决这个错误。但是，你必须安装xcode命令行工具。

从这里开始:

$ CD /usr/bin $ sudo mv xcodebuild xcodebuild。orig(以防万一的备份) $ vim xcodebuild 粘贴如下内容:

#!/bin/bash
if [[ $1 == '-version' ]]; then
  echo "Xcode 10.2.1"
  echo "Build version 10E1001"
else
  /usr/bin/xcodebuild.bak $@
fi

$sudo chmod +x xcodebuild

我只是运行了以下命令，问题为我解决了:

sudo xcode-select --reset

我得先运行这个

sudo xcode-select --reset

then

sudo xcode-select -switch /Library/Developer/CommandLineTools

然后就成功了。

sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer

languoguangs-iMac:/ languoguang$ sudo xcode-select -s /Applications/Xcode 10.app/Contents/Developer
xcode-select: error: invalid argument '10.app/Contents/Developer'
Usage: xcode-select [options]

Print or change the path to the active developer directory. This directory
controls which tools are used for the Xcode command line tools (for example, 
xcodebuild) as well as the BSD development commands (such as cc and make).

Options:
  -h, --help                  print this help message and exit
  -p, --print-path            print the path of the active developer directory
  -s <path>, --switch <path>  set the path for the active developer directory
  --install                   open a dialog for installation of the command line developer tools
  -v, --version               print the xcode-select version
  -r, --reset                 reset to the default command line tools path
languoguangs-iMac:/ languoguang$ sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

因为我在应用程序中的Xcode名称是Xcode 10，

sudo xcode-select -s "/Applications/Xcode 10.app/Contents/Developer"

的工作原理。

就我而言，

sudo xcode-select -s /Applications/Xcode.app/Contents/Developer 

因为我的Xcode有一些特殊的名字。如)Xcode_11.2.0_beta_2_stackoverflow.app

cd /applications
ls

然后我找到了我的Xcode名称，然后用

sudo xcode-select -s /Applications/{myXcodeName}.app/Contents/Developer 

这对我很管用。