Ad Hoc なら CFBundleVersion を増やす

increment_bundle_version.rb

#!/usr/bin/env ruby
#
# gem install plist
#
# On Xcode, right-click on your Target where you want to use this and select 
#  Add->New Build Phase->New Run Script Build Phase.
#
# Set the Shell to 
#  /usr/bin/ruby
#
# And paste this script.
#
require 'rubygems'
require 'plist'

exit if ENV['CONFIGURATION'] != "Ad Hoc"

current_plist_file = "#{ENV['PROJECT_DIR']}/#{ENV['INFOPLIST_FILE']}"
current_plist_hash = Plist::parse_xml(current_plist_file)

current_version_array = current_plist_hash['CFBundleVersion'].split(".")
current_version_array.push(current_version_array.pop.to_i + 1).to_s
current_plist_hash['CFBundleVersion'] = current_version_array.join(".")

File.open(current_plist_file, 'w') {|f| f.write(current_plist_hash.to_plist) }