You want to use the NSUUID class, but you are targeting a platform where it's not available, i.e. iOS < 6 or OS X < 10.8.
Just compile the
NSUUID.m file (without ARC) in your project. The
NSUUID class will then be automatically available, even on platforms where it is normally not available.
NSUUID does not work on iOS < 6 and OS X < 10.8.
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Copyright (c) 2013 Cédric Luthi
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