calabash-cucumber launch.rb that will not restart the iOS Simulator for each scenario but still restart the app itself each time.

launch.rb

########################################
#                                      #
#       Important Note                 #
#                                      #
#   When running calabash-ios tests at #
#   www.lesspainful.com                #
#   this file will be overwritten by   #
#   a file which automates             #
#   app launch on devices.             #
#                                      #
#   Don't rely on this file being      #
#   present when running at            #
#   www.lesspainful.com.               #
#                                      #
#  Only put stuff here to automate     #
#  iOS Simulator.                      #
#                                      #
#  You can put your app bundle path    #
#  for automating simulator app start: #
#  Uncomment APP_BUNDLE_PATH =..       #
#                                      #
########################################

require 'calabash-cucumber/launch/simulator_helper'
require 'sim_launcher'

# Uncomment and replace ?? appropriately
# This should point to your Simulator build
# which includes calabash framework
# this is usually the Calabash build configuration
# of your production target.
#APP_BUNDLE_PATH = "~/Library/Developer/Xcode/DerivedData/??/Build/Products/Calabash-iphonesimulator/??.app"

# If WORKSPACE is set then we're running under Jenkins and need to set the path to the app
if ENV['WORKSPACE']
  APP_BUNDLE_PATH = "./build/Debug-iphonesimulator/AT-Sapphire.app"
end

def trace(message)
  if ENV['CUKE_TRACING']=="1"
    puts "***** #{message}"
  end
end

def reset_app_jail(sdk, app_path)
  app = File.basename(app_path)
  trace "reset_app_jail: app_path = #{app_path} app = #{app}"
  bundle = `find "#{ENV['HOME']}/Library/Application Support/iPhone Simulator/#{sdk}/Applications/" -type d -depth 2 -name "#{app}" | head -n 1`
  return if bundle.empty? # Assuming we're already clean

  sandbox = File.dirname(bundle)
  ['Library', 'Documents', 'tmp'].each do |dir|
    FileUtils.rm_rf(File.join(sandbox, dir))
  end
end

def relaunch(args=nil)
  if ENV['NO_LAUNCH']!="1"
    sdk = ENV['SDK_VERSION'] || SimLauncher::SdkDetector.new().latest_sdk_version
    path = Calabash::Cucumber::SimulatorHelper.app_bundle_or_raise(app_path)
    if ENV['RESET_BETWEEN_SCENARIOS']!="0"
      reset_app_jail(sdk, path)
    end

    # Call our own function to launch the simulator so we don't restart it with each scenario
    # We restart the app but not the sim.
    #Calabash::Cucumber::SimulatorHelper.relaunch(path,sdk,ENV['DEVICE'] || 'ipad', args)
    launch_simulator(path,sdk,ENV['DEVICE'] || 'ipad', args)
  end
end

def app_path
  ENV['APP_BUNDLE_PATH'] || (defined?(APP_BUNDLE_PATH) && APP_BUNDLE_PATH)
end

def calabash_notify
  if self.respond_to?(:on_launch)
    self.on_launch
  end
end

def reset_simulator
  system 'killall "iPhone Simulator"'
end

def launch_simulator(path, sdk, device, args)
  trace "LAUNCHIHNG SIMULATOR: path = #{path} sdk = #{sdk} device = #{device} args = #{args}"

  # obtain the path to ios-sim by calling the ruby object
  ios_sim = SimLauncher::Simulator.new.iphonesim_path(nil)

  # manually launch the sim via a shell comand so we can specify --exit and allow it to re-use an already open simulator"
  command = "\"#{ios_sim}\" launch \"#{path}\" --family #{device} --exit #{args}"
  trace "LAUNCHIHNG SIMULATOR: command = #{command}"
  system command
end

Before do |scenario|
  if !$have_reset_simulator
    reset_simulator
    $have_reset_simulator = true
  end

  relaunch
  calabash_notify
end

at_exit do
  if ENV['NO_LAUNCH']!="1" and ENV['NO_STOP']!="1"
    Calabash::Cucumber::SimulatorHelper.stop
  end
end

is any way to for each step like Before do | scenario |.
In my map app i have to check is any ad banner is appearing or not before execution of each step. if any ad is present then close the app.