While executing gem ... (Gem::FilePermissionError)

最近在使用pod install命令時一直報錯：

ERROR:  While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /usr/bin directory. 複製代碼

錯誤信息顯示權限不夠，好吧，修改權限

sudo gem install cocoapods --pre
sudo chmod 777 /Library/Ruby/Gems/2.3.0
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試試證實以上命令均無效： 最後使用一下命令安裝成功

sudo gem install cocoapods -n /usr/local/bin
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而後

pod install
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成功執行

Analyzing dependencies
Downloading dependencies
Installing SDWebImage (4.3.3)
Generating Pods project
Integrating client project

[!] Please close any current Xcode sessions and use `MainProject.xcworkspace` for this project from now on.
Sending stats
Pod installation complete! There is 1 dependency from the Podfile and 1 total pod installed.
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