Convert from UNIX Epoch to Date String

How do I conv开发者_StackOverflowert from a unix epoch integer to date string?

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Code:

NSUInteger *foo = 123456789;
NSString *bar = [[NSDate dateWithTimeIntervalSince1970:foo] description];

PLEASE PLEASE PLEASE PLEASE PLEASE be user-friendly and show the date according to the locale of the user: Cocoa - Localized string from NSDate, NSCalendarDate