Why does my NSDateFormatter sometimes return an a.m. or p.m. with yyyyMMddHHmmssSSS

需要设置Locale

NSDateFormatter *dateFormatter = [[[NSDateFormatter
alloc]
init] autorelease];

[dateFormatter
setDateFormat:@"yyyyMMddHHmmss"];

NSDate *currentDate = [[[NSDate
alloc] init]
autorelease];

[dateFormatter setCalendar:[NSCalendar
autoupdatingCurrentCalendar]];

[dateFormatter setLocale:[[[NSLocale
alloc] initWithLocaleIdentifier:@"en_US"]
autorelease]];

NSString *strDate = [dateFormatter
stringFromDate:currentDate];

http://stackoverflow.com/questions/7072267/why-does-my-nsdateformatter-sometimes-return-an-a-m-or-p-m-with-yyyymmddhhmmss

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