```ruby
#
# Be sure to run `pod spec lint NAME.podspec' to ensure this is a
# valid spec and remove all comments before submitting the spec.
#
# To learn more about the attributes see http://docs.cocoapods.org/specification.html
#
Pod::Spec.new do |s|
  s.name         = 'NAPlaybackIndicatorView'
  s.version      = '0.1.0'
  s.summary      = 'A short description of NAPlaybackIndicatorView.'
  s.description  = <<-DESC
                    An optional longer description of NAPlaybackIndicatorView

                    * Markdown format.
                    * Don't worry about the indent, we strip it!
                   DESC
  s.homepage     = 'http://EXAMPLE/NAME'
  s.screenshots  = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
  s.license      = 'MIT'
  s.author       = { 'Yuji Nakayama' => 'nkymyj@gmail.com' }
  s.source       = { git: 'http://EXAMPLE/NAME.git', tag: s.version.to_s }

  # s.platform     = :ios, '5.0'
  # s.ios.deployment_target = '5.0'
  # s.osx.deployment_target = '10.7'
  s.requires_arc = true

  s.source_files = 'Classes'
  s.resources = 'Assets'

  s.ios.exclude_files = 'Classes/osx'
  s.osx.exclude_files = 'Classes/ios'
  # s.public_header_files = 'Classes/**/*.h'
  # s.frameworks = 'SomeFramework', 'AnotherFramework'
  # s.dependency 'JSONKit', '~> 1.4'
end
```

Update build infomation of podspec
user
```ruby
#
# Be sure to run `pod spec lint NAME.podspec' to ensure this is a
# valid spec and remove all comments before submitting the spec.
#
# To learn more about the attributes see http://docs.cocoapods.org/specification.html
#
Pod::Spec.new do |s|
  s.name         = 'NAPlaybackIndicatorView'
  s.version      = '0.1.0'
  s.summary      = 'A short description of NAPlaybackIndicatorView.'
  s.description  = <<-DESC
                    An optional longer description of NAPlaybackIndicatorView

                    * Markdown format.
                    * Don't worry about the indent, we strip it!
                   DESC
  s.homepage     = 'http://EXAMPLE/NAME'
  s.screenshots  = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
  s.license      = 'MIT'
  s.author       = { 'Yuji Nakayama' => 'nkymyj@gmail.com' }
  s.source       = { git: 'http://EXAMPLE/NAME.git', tag: s.version.to_s }

  s.platform     = :ios, '7.0'
  s.ios.deployment_target = '7.0'
  s.requires_arc = true

  s.source_files = 'Classes'
  s.frameworks = 'QuartzCore'
end
```
assistant