The classic software implementation of LIFE (from John Conway's rules) in Ruby Motion
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

This is intended to be a COMMUNITY PROJECT You are highly encouraged to:

  • Fork, Hack, Pull Request, Repeat

Consider this another playground for you to exercise and improve your RubyMotion expertise.

= = = = = = = = = = = = = = =


Join the chat at

As an example and exercise for RubyMotion, this is - yet another - implementation of John Conway's LIFE.

2012-2013 Thom Parkin

The Rules

  1. Any live cell with fewer than two live neighbors dies, as if caused by under-population.
  2. Any live cell with two or three live neighbors lives on to the next generation.
  3. Any live cell with more than three live neighbors dies, as if by overcrowding.
  4. Any dead cell with exactly three live neighbors becomes a live cell, as if by reproduction.

Using The Application

Initially, a field is displayed that represents a set of cells. The initial state is dormant (none are alive). Tapping a cell will toggle its state. Once you have set up the field as you wish, "Begin Evolution" will start the process of evolving based on the rules John Conway had set out in 1970.

Say Thanks

To do:

  • Settings bundle (maybe utilize this gem:
  • The time delay between evolution cycles is configurable. I would like to give the user an easy option to change/test that value.
  • Allow preloading of setups to begin. This alleviates the painstaking task of touches to toggle each cell into the initial state you wish.
  • In the simulator, if you close the application then reopen it, it should reset. I don't know how to do that with iOS or RubyMotion.
  • As a cell dies (and is born) the image should 'animate'.
  • There are many setups that eventually settle into a statis (the pattern of cells does not change or it toggles between two states). It would be nice to capture when this occurs and notify the user.
  • Tests! Of course, we should have tests.

Please hack on this and, where you see an area for improvement, update it. Don't hesitate to send a pull request.

This application was fun to develop. The very first thing I typed was motion create life. I felt like Doctor Frankenstein!!