CocoaPods is a dependency manager for iOS and macOS. It allows users to define dependencies in a Podfile, install and update dependencies, and generate a workspace with the dependencies included. Podspecs can be created to define and publish libraries to a specs repo. Pod versions can be specified using logical operators like >, >=, <, <= or ~> to indicate compatible version ranges.

1. CocoaPods
CocoaPods

2. CocoaPods
• iOS
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3. • gem sources —remove https://rubygems.org/
• gem sources -a https://ruby.taobao.org
• sudo gem install cocoapods

4. • pod init
• pod search AFNetworking
• `pod "AFNetworking", "~> 2.0” ` Podfile
• pod update / pod update AFNetworking
• *.workspace

5. • podspec
• pod spec create your_library_name
• specs.git

6. podfile.lock
•
•

7. Podfile
• pod 'AFNetworking', '~> 2.5.1’ # pod update <2.6
• pod 'Nimbus/AttributedLabel', '~> 1.2.0’ # subpodspec
• pod ‘AFNetworking’, :git=>”http://github.com/xxx”, commit=“a_sha1_hash”
• pod ‘AFNetworking’, :git=>”http://github.com/xxx”, branch=>“dev”
• pod ‘AFNetworking’, :git=>”http://github.com/xxx”, tag=>“1.6”
• pod ‘AFNetworking’, :path=>”~/Documents/AFNetworking” # datamanager
• pod update / pod install
• http://guides.cocoapods.org/using/the-podfile.html

8. post_install
post_install do |installer_representation|
installer_representation.project.targets.each do |target|
if target.name == "Pods-EMToday-AFNetworking"
target.build_configurations.each do |config|
config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$
(inherited)', 'AF_APP_EXTENSIONS=1']
end
end
end
end

9. Specifying pod versions
Besides no version, or a specific one, it is also possible to use logical operators:
• '> 0.1' Any version higher than 0.1
• '>= 0.1' Version 0.1 and any higher version
• '< 0.1' Any version lower than 0.1
• '<= 0.1' Version 0.1 and any lower version
In addition to the logic operators CocoaPods has an optimistic operator ~>:
• '~> 0.1.2' Version 0.1.2 and the versions up to 0.2, not including 0.2 and
higher
• '~> 0.1' Version 0.1 and the versions up to 1.0, not including 1.0 and higher
• '~> 0' Version 0 and higher, this is basically the same as not having it.