app_delegate.rb

class AppDelegate
  attr_accessor :moviesViewController, :notificationsViewController, :tabBar
  
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    ...
    # Reachability
    ServerClient.sharedInstance.setupReachability
    AFNetworkActivityIndicatorManager.sharedManager.enabled = true
    ...
  end
end

Rakefile

Motion::Project::App.setup do |app|
...
  app.pods do
    pod 'Reachability'
  end
...
end

server_client.rb

class ServerClient < AFHTTPClient

  def setupReachability
    self.operationQueue.maxConcurrentOperationCount = 1
    self.operationQueue.suspended = true
    
    @reachability = Reachability.reachabilityWithHostname(ServerClient.hostname)
    @reachability.reachableBlock = lambda {|reachable| ServerClient.sharedInstance.operationQueue.suspended = false}
    @reachability.unreachableBlock = lambda {|reachable| ServerClient.sharedInstance.operationQueue.suspended = true}
    @reachability.startNotifier
  end
  
end