```ruby
Pod::Spec.new do |s|
  s.name         = 'POSInputStreamLibrary'
  s.version      = '2.0.0'
  s.license      = 'MIT'
  s.summary      = 'NSInputStream implementation for ALAsset and other kinds of data source.'
  s.homepage     = 'https://github.com/pavelosipov/POSInputStreamLibrary'
  s.authors      = { 'Pavel Osipov' => 'posipov84@gmail.com' }
  s.source       = { :git => 'https://github.com/pavelosipov/POSInputStreamLibrary.git', :tag => '2.0.0' }
  s.platform     = :ios, '7.0'
  s.requires_arc = true
  s.source_files = 'POSInputStreamLibrary/*.{h,m}'
  s.frameworks   = 'Foundation', 'AssetsLibrary', 'UIKit', 'ImageIO', 'Photos'
end
```

Move 'Photos' framework from required framework list to optional one.
user
```ruby
Pod::Spec.new do |s|
  s.name         = 'POSInputStreamLibrary'
  s.version      = '2.0.0'
  s.license      = 'MIT'
  s.summary      = 'NSInputStream implementation for ALAsset and other kinds of data source.'
  s.homepage     = 'https://github.com/pavelosipov/POSInputStreamLibrary'
  s.authors      = { 'Pavel Osipov' => 'posipov84@gmail.com' }
  s.source       = { :git => 'https://github.com/pavelosipov/POSInputStreamLibrary.git', :tag => '2.0.0' }
  s.platform     = :ios, '7.0'
  s.requires_arc = true
  s.source_files = 'POSInputStreamLibrary/*.{h,m}'
  s.frameworks   = 'Foundation', 'AssetsLibrary', 'UIKit', 'ImageIO'
  s.weak_framework = 'Photos'
end
```
assistant