s9icongen - App icon generator

Introduction

The Ruby script s9icongen automatically generates icon files of all necessary sizes for iPhone and/or iPad apps (iOS 7 and above). It uses imagemagick and the gem rmagick.

Installation

Install imagemagick and rmagick via

brew install imagemagick
gem install rmagick

Usage

Just run the script

./s9icongen.rb my_icon.png

The first argument is the filename of the icon image (should be quadratic and at least 1024x1024 in size). By default only iPhone icon files are generated. If one supplies a second argument (ipad or universal), iPad icon files or iPhone/iPad icon files are generated respectively.

Example

The command

./s9icongen.rb my_icon.png universal

will generate

    29x29: icons/Icon-29.png
    58x58: icons/[email protected]
    87x87: icons/[email protected]
    80x80: icons/[email protected]
  120x120: icons/[email protected]
  120x120: icons/[email protected]
  180x180: icons/[email protected]
    29x29: icons/Icon-29.png
    58x58: icons/[email protected]
    40x40: icons/Icon-40.png
    80x80: icons/[email protected]
    76x76: icons/Icon-76.png
  152x152: icons/[email protected]
  120x120: icons/Icon-120.png
  512x512: icons/iTunesArtwork
1024x1024: icons/iTunesArtwork@2x

RubyMotion

Add the icon files to your resources directory and add the following line to your rakefile

app.icons = Dir.glob('resources/Icon*.png').map{|icon| icon.split('/').last}