――― MARKDOWN TEMPLATE ―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――

Command

/usr/local/bin/pod init

Report

What did you do?
What did you expect to happen?
What happened instead?

Stack

   CocoaPods : 1.4.0.beta.2
        Ruby : ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17]
    RubyGems : 2.5.2
        Host : Mac OS X 10.13.5 (17F59b)
       Xcode : 9.3 (9E145)
         Git : git version 2.15.1 (Apple Git-101)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ f2de6a6062353245774212372881131f8a0bab4b

Plugins

cocoapods-deintegrate : 1.0.1
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.0.0
cocoapods-trunk       : 1.3.0
cocoapods-try         : 1.1.0

Error

RuntimeError - [Xcodeproj] Unknown object version.
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.3/lib/xcodeproj/project.rb:217:in `initialize_from_file'
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.3/lib/xcodeproj/project.rb:102:in `open'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.4.0.beta.2/lib/cocoapods/command/init.rb:41:in `validate!'
/Library/Ruby/Gems/2.3.0/gems/claide-1.0.2/lib/claide/command.rb:333:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.4.0.beta.2/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.4.0.beta.2/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:22:in `load'
/usr/local/bin/pod:22:in `<main>'

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[!] Oh no, an error occurred.

Search for existing GitHub issues similar to yours:
https://github.com/CocoaPods/CocoaPods/search?q=%5BXcodeproj%5D+Unknown+object+version.&type=Issues

If none exists, create a ticket, with the template displayed above, on:
https://github.com/CocoaPods/CocoaPods/issues/new

Be sure to first read the contributing guide for details on how to properly submit a ticket:
https://github.com/CocoaPods/CocoaPods/blob/master/CONTRIBUTING.md

Don't forget to anonymize any private data!

Looking for related issues on cocoapods/cocoapods...

RuntimeError - [Xcodeproj] Unknown object version.
https://github.com/CocoaPods/CocoaPods/issues/7697 [closed] [11 comments]
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RuntimeError - [Xcodeproj] Unknown object version.
https://github.com/CocoaPods/CocoaPods/issues/7458 [closed] [12 comments]
3 weeks ago
RuntimeError - [Xcodeproj] Unknown object version.
https://github.com/CocoaPods/CocoaPods/issues/6992 [closed] [12 comments]
2 weeks ago

and 36 more at:
https://github.com/cocoapods/cocoapods/search?q=[Xcodeproj]%20Unknown%20object%20version.&type=Issues&utf8=✓

解决方法

执行：

sudo rm -fr ~/.cocoapods/repos/master
pod setup

方法二：

sudo gem install cocoapods --pre

在执行pod init报错