ArgumentError - Malformed version number string。简单翻译就是参数错误---畸形的版本字符串。
我的版本信息是：
CocoaPods : 1.4.0
Ruby : ruby 2.3.7p456 (2018-03-28 revision 63024) [x86_64-darwin17]
RubyGems : 2.7.7
Host : Mac OS X 10.13.6 (17G65)
Xcode : 10.0 (10A255)
Git : git version 2.17.1 (Apple Git-112)
Ruby lib dir : /Users/****/.rvm/rubies/ruby-2.3.7/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ 6cb0bb622cb67047a18a50c0efa6a21d2778b3ab
然后搜索ArgumentError - Malformed version number string，就发现了下边这个网友的回答：
https://xiaozhuanlan.com/topic/5483906721
我的问题和他一模一样：
解决方案
遇到问题一定要仔细查看报错信息，来排查。不要像无头苍蝇一样乱撞，那样根本解决不了问题。这次我要是能一开始就只搜索版本信息应该早就解决问题了。
我可以直接和能够正常运行的电脑进行版本比较，就可以很好解决这个版本问题。
我的报错信息：
### Error
```
ArgumentError - Malformed version number string
/Users/****/.rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/rubygems/version.rb:209:in `initialize'
/Users/****/.rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/rubygems/version.rb:200:in `new'
/Users/****/.rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/rubygems/version.rb:200:in `new'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/generator/xcconfig/aggregate_xcconfig.rb:119:in `embedded_content_settings'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/generator/xcconfig/aggregate_xcconfig.rb:64:in `generate'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/generator/xcconfig/aggregate_xcconfig.rb:39:in `save_as'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/target_installer.rb:114:in `update_changed_file'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/aggregate_target_installer.rb:87:in `block in create_xcconfig_file'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/aggregate_target_installer.rb:84:in `each'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/aggregate_target_installer.rb:84:in `create_xcconfig_file'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/aggregate_target_installer.rb:18:in `block in install!'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:142:in `message'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator/aggregate_target_installer.rb:14:in `install!'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator.rb:175:in `block (2 levels) in install_libraries'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator.rb:173:in `each'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator.rb:173:in `block in install_libraries'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:142:in `message'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator.rb:167:in `install_libraries'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer/xcode/pods_project_generator.rb:65:in `generate!'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:184:in `block in generate_pods_project'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/user_interface.rb:64:in `section'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:183:in `generate_pods_project'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/installer.rb:119:in `install!'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/command/install.rb:41:in `run'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/lib/cocoapods/command.rb:52:in `run'
/Users/****/.rvm/gems/ruby-2.3.7@global/gems/cocoapods-1.4.0/bin/pod:55:in `<top (required)>'
/Users/****/.rvm/rubies/ruby-2.3.7/bin/pod:23:in `load'
/Users/****/.rvm/rubies/ruby-2.3.7/bin/pod:23:in `<main>'
/Users/****/.rvm/gems/ruby-2.3.7@global/bin/ruby_executable_hooks:24:in `eval'
/Users/****/.rvm/gems/ruby-2.3.7@global/bin/ruby_executable_hooks:24: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=Malformed+version+number+string+&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!
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