Rakefile

Motion::Project::App.setup do |app|
  # (snip)

  app.pods do
    pod 'SocketRocket', :podspec => 'SocketRocket'
    pod 'socket.IO', :podspec => 'socket.IO.podspec'
  end
end

socket.IO.podspec

Pod::Spec.new do |s|
  s.name         = "socket.IO"
  s.version      = "0.2.5"
  s.summary      = "socket.io v0.7.2+ for iOS devices"
  s.description  = <<-DESC
    Interface to communicate between Objective C and Socket.IO with the help of websockets. It's based on fpotter's socketio-cocoa and uses other libraries/classes like SocketRocket, json-framework (optional) and jsonkit (optional).
                   DESC
  s.homepage     = "https://github.com/pkyeck/socket.IO-objc"
  s.license      = 'MIT'

  s.author       = { "Philipp Kyeck" => "philipp@beta-interactive.de" }
  s.source       = { :git => "https://github.com/pkyeck/socket.IO-objc.git", :branch => 'master' } # changed

  s.source_files = '*.{h,m}'

  s.requires_arc = true

  s.dependency 'SocketRocket', '~> 0.2'
end

SocketRocket.podspec

Pod::Spec.new do |s|
  s.name               = "SocketRocket"
  s.version            = '0.2.1'
  s.summary            = 'A conforming WebSocket (RFC 6455) client library.'
  s.homepage           = 'https://github.com/square/SocketRocket'
  s.authors            = 'Square'
  s.license            = 'Apache License, Version 2.0'
  s.source             = { :git => 'https://github.com/square/SocketRocket.git', :branch => 'master' } # changed
  s.source_files       = 'SocketRocket/*.{h,m,c}'
  s.requires_arc       = true
  s.ios.frameworks     = %w{CFNetwork Security}
  s.osx.frameworks     = %w{CoreServices Security}
  s.osx.compiler_flags = '-Wno-format'
  s.libraries          = "icucore"
end