Take screenshots without status bars with UIAutomation http://shorts.jeffkreeftmeijer.com/2014/taking_screenshots_without_status_bars_with_uiautomation/

README.markdown

Taking creenshots without status bars with UIAutomation

The essential bits from [https://github.com/jonathanpenn/ui-screen-shooter](ui-screen shooter).

• To install, clone this Gist into your project's root:

git clone git@gist.github.com:/962170d4b533e5c5e3d5.git Scripts

• Update the list of simulators in screenshots.rb
• Update the languages array, unless you need English, German and French too
• Build your project so it ends up in DerivedData/*/Build/Products/*/*.app, or update the build path in screenshots.rb
• Run with ./Scripts/screenshots.rb

screenshots.js

target = UIATarget.localTarget()
window = target.frontMostApp().mainWindow();

// Wait for the app to finish loading
target.delay(1) 

UIALogger.logMessage('Creating screenshot with the status bar')
target.captureScreenWithName('home');

UIALogger.logMessage('Creating screenshot without the status bar')
rectWithoutStatusBar = target.rect()
rectWithoutStatusBar.origin.y = 20.0
target.captureRectWithName(rectWithoutStatusBar, 'home_without_status_bar');

// To learn how to navigate around your app, read "Automating UI Testing" in the
// Instruments User Guide: https://developer.apple.com/library/ios/documentation/DeveloperTools/Conceptual/InstrumentsUserGuide/UsingtheAutomationInstrument/UsingtheAutomationInstrument.html

screenshots.rb

#!/usr/bin/env ruby
require 'tmpdir'
require 'pathname'

class Screenshot
  def tracetemplate
    '/Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/PlugIns/AutomationInstrument.xrplugin/Contents/Resources/Automation.tracetemplate'
  end

  def destination_directory
    File.expand_path('screenshots')
  end

  def build
    Dir['DerivedData/*/Build/Products/*/*.app'].first
  end


  def script
    'Scripts/screenshots.js'
  end

  # Run `instruments -w help!` to get the list of available simulators.
  def simulators
    {
      ipad: "iPad Retina (8.0 Simulator)",
      iphone_4: "iPhone 4s (8.0 Simulator)",
      iphone_5: "iPhone 5s (8.0 Simulator)",
      iphone_6: "iPhone 6 (8.0 Simulator)",
      iphone_6_plus: "iPhone 6 Plus (8.0 Simulator)"
    }
  end

  def languages
    %w(en de fr)
  end

  def command(command)
    puts "Running `#{command}`..."
    IO.popen(command).each do |line|
      print line
    end
  end

  def run
    Dir.mktmpdir do |results_directory|
      languages.each do |language|
        simulators.each do |key, simulator|
          command(
            "instruments " <<
            "-w \"#{simulator}\" " <<
            "-t #{tracetemplate} " <<
            "-D #{results_directory} " <<
            "#{build} -e UIARESULTSPATH #{results_directory} -e UIASCRIPT #{script} " <<
            "-AppleLanguages \"(#{language})\" " << 
            "-AppleLocale \"#{language}\""
          )

          Dir.glob("#{results_directory}/**/*.png").each do |path|
            filename = "#{key}_#{language}_#{Pathname.new(path).basename}"
            File.rename(path, File.join(destination_directory, filename))
            puts "Saved #{filename} to #{destination_directory}"
          end
        end
      end
    end
  end
end

Screenshot.new.run