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Font awesome is an iconic font. Read more about it on http://fortawesome.github.com/Font-Awesome/
The project is an open source category submitted by Alex Usbergo that extends NSString allowing you to easily use the FontAwesome fonts in your apps simply by using identifying names for the different included icons.
You simply use the provided helper libraries to use the icon names as listed on the FontAwesome homepage like this:
label.text = [NSString fontAwesomeIconStringForIconIdentifier:@"icon-github"];
Or by using the bundled enums:
label.text = [NSString fontAwesomeIconStringForEnum:FAIconGithub];