問題例如：error: active developer path ("/Applications/Xcode.app/Contents/Developer") does not exist, use xcode-select to change
個人是因爲裝Alcatraz的時候失敗了，提示error如下：
Xcode Command Line Tools are not currently installed, and are required to run Alcatraz.後來想起的我的 xcode7.2 是從朋友那邊拷過來的，或許是因xcode本身的路徑不對導致的問題。
下面介紹如何使用終端改xcode的路徑：
1、打開終端
//確認當前工作位置
appledeMacBook-Pro-3:~ 09$ pwd
/Users/apple
//由於忘記具體執行代碼 輸入 xcode-select獲取提示
appledeMacBook-Pro-3:~ 09$ xcode-select
----------
xcode-select: error: no command option given
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
----------
//發現-p是獲取 xcode現在路徑；-s是轉移到對應路徑
appledeMacBook-Pro-3:~ 09$ xcode-select -p
/Users/apple/Documents/Xcode 2.app/Contents/Developer
//果然 xcode 不在應用程序中的位置
//ls 相應路徑確認存在
appledeMacBook-Pro-3:~ 09$ ls /Applications/Xcode.app/Contents/Developer/
Applications Library Platforms Tools
Documentation Makefiles Toolchains usr
//-s 相應路徑 將 xcode 轉移到對應路徑
appledeMacBook-Pro-3:~ 09$ xcode-select -s /Applications/Xcode.app/Contents/Developer/
//這裏給我報了個錯誤
----------
xcode-select: error: --switch must be run as root (e.g. sudo xcode-select --switch <xcode_folder_path>).
----------
//然後我複製它給我的命令 將路徑寫入
appledeMacBook-Pro-3:~ 09$ sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer/
//提示輸入本機密碼
//輸入後成功。
