CocoaPods trunk is moving to be read-only. Read more on the blog, there are 18 months to go.

MAOFlipViewController 0.0.1

Maintained by Unclaimed.

You want to add pod 'MAOFlipViewController', '~> 0.0' similar to the following to your Podfile:

target 'MyApp' do
  pod 'MAOFlipViewController', '~> 0.0'
end

Then run a pod install inside your terminal, or from CocoaPods.app.

Alternatively to give it a test run, run the command:

pod try MAOFlipViewController

This is the OSS that provide interacition transition like FlipBoard.