app_delegate.rb

  def database
    return @database if @database

    manager = CBLManager.sharedInstance
    error_ptr = Pointer.new(:object)
    @database = manager.databaseNamed("todos", error: error_ptr)
    unless @database
      error = error_ptr[0]
      alert = UIAlertView.alloc.initWithTitle("Local Database Error",
                                              message:"No access to local database. #{error}",
                                              delegate:nil,
                                              cancelButtonTitle:"Ok",
                                              otherButtonTitles: nil)
      alert.show
    else
      @database
    end
  end