pod install的时候报错解决方法

直接贴报错的返回的错的提示：
suomalideMacBook-Pro:YouQianbao suomali$ pod install
Analyzing dependencies

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Command

/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod install

Report

• What did you do?

• What did you expect to happen?

• What happened instead?

Stack

   CocoaPods : 1.4.0
        Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin17]
    RubyGems : 2.5.2.3
        Host : Mac OS X 10.13.6 (17G65)
       Xcode : 10.0 (10A255)
         Git : git version 2.17.1 (Apple Git-112)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ 8e75aa45ab0e22f228649472ccd2bdf9a8cb8c36

Plugins

cocoapods-deintegrate : 1.0.2
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

Podfile

platform :ios, '7.0'
target 'YouQianbao' do
    pod 'AFNetworking'
    pod 'SobotKit'
   pod  'LLPay'
       
end

Error

RuntimeError - [Xcodeproj] Unknown object version.
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/xcodeproj-1.5.4/lib/xcodeproj/project.rb:217:in `initialize_from_file'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/xcodeproj-1.5.4/lib/xcodeproj/project.rb:102:in `open'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:907:in `block (2 levels) in inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:906:in `each'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:906:in `block in inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:901:in `inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:75:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:243:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:154:in `block in resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:153:in `resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:116:in `install!'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command/install.rb:41:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command.rb:52:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/bin/pod:55:in `'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `load'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `
'

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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] [31 comments]
  a week ago

• RuntimeError - [Xcodeproj] Unknown object version.
  https://github.com/CocoaPods/CocoaPods/issues/6992 [closed] [13 comments]
  22 hours ago

• Pod Update: RuntimeError - [Xcodeproj] Unknown object version. Xcode Beta 5
  https://github.com/CocoaPods/CocoaPods/issues/8003 [closed] [17 comments]
  19 Aug 2018

and 42 more at:
https://github.com/cocoapods/cocoapods/search?q=[Xcodeproj]%20Unknown%20object%20version.&type=Issues&utf8=✓
suomalideMacBook-Pro:YouQianbao suomali cd /Users/suomali/Desktop/有钱宝本地仓库/YouQianbao
suomalideMacBook-Pro:YouQianbao suomali$ pod install
Analyzing dependencies

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

Command

/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod install

Report

• What did you do?

• What did you expect to happen?

• What happened instead?

Stack

   CocoaPods : 1.4.0
        Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin17]
    RubyGems : 2.5.2.3
        Host : Mac OS X 10.13.6 (17G65)
       Xcode : 10.0 (10A255)
         Git : git version 2.17.1 (Apple Git-112)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ 8e75aa45ab0e22f228649472ccd2bdf9a8cb8c36

Plugins

cocoapods-deintegrate : 1.0.2
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

Podfile

platform :ios, '7.0'
target 'YouQianbao' do
    pod 'AFNetworking'
    pod 'SobotKit'
   pod  'LLPay'
       
end

Error

RuntimeError - [Xcodeproj] Unknown object version.
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/xcodeproj-1.5.4/lib/xcodeproj/project.rb:217:in `initialize_from_file'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/xcodeproj-1.5.4/lib/xcodeproj/project.rb:102:in `open'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:907:in `block (2 levels) in inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:906:in `each'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:906:in `block in inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:901:in `inspect_targets_to_integrate'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer/analyzer.rb:75:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:243:in `analyze'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:154:in `block in resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:153:in `resolve_dependencies'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:116:in `install!'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command/install.rb:41:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/lib/cocoapods/command.rb:52:in `run'
/usr/local/Cellar/cocoapods/1.4.0/libexec/gems/cocoapods-1.4.0/bin/pod:55:in `'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `load'
/usr/local/Cellar/cocoapods/1.4.0/libexec/bin/pod:22:in `
'

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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] [31 comments]
  a week ago

• RuntimeError - [Xcodeproj] Unknown object version.
  https://github.com/CocoaPods/CocoaPods/issues/6992 [closed] [13 comments]
  22 hours ago

• Pod Update: RuntimeError - [Xcodeproj] Unknown object version. Xcode Beta 5
  https://github.com/CocoaPods/CocoaPods/issues/8003 [closed] [17 comments]
  19 Aug 2018

and 42 more at:
https://github.com/cocoapods/cocoapods/search?q=[Xcodeproj]%20Unknown%20object%20version.&type=Issues&utf8=✓

以上的提示是因为mac升级了系统的版本的问题。
更新cocoapods就好了，
代码如下：

$ sudo gem update --system
$ sudo gem install cocoapods -n/usr/local/bin