This is a collection of tools that might help you automate taking screenshots for your iOS application
Check top of each script for more info.
Short example of how you might use simulator.rb and nuremote.rb
Wraps bin/ios-sim that is used to boot the simulator. Also features a few apple scripts to interact with the simulator, and to save a screenshot.
Super simple client for the Nu Remoting tool which lets you interface with your app in a simple scripted way through a TCP socket.
Follow the instructions in the readme at the Nu Remoting github page to add it to your app.
To crop the status bar from your screenshots you can use the following ImageMagic for retina screenshots (20 instead of 40 for non-retina)
$ convert 'source.png' -crop -0+40 -gravity South 'target.png'"