objective c - Get last time with period in iPhone 4 with NSDateFormatter -

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i have problem method:

-(nsstring *)getlasttimemessagewithperiod:(nsdate*)lastmessagedate { nsdateformatter *dateformatter = [[nsdateformatter alloc] init];  [dateformatter setdateformat:@"h:mm a"];  nsstring *resultstring = [dateformatter stringfromdate: lastmessagedate];  return resultstring; }

in iphone 4 (ios 7.1 ) resultstring return " 12:32 "

in iphone 5 (ios 8 ) resultstring return " 12:32 "

what can problem makes miss period in iphone 4 ?

i've tested provided code on ios 7.1 device, , gave me "3:22", problem not device or os version.

problem locale, , work

- (nsstring *)getlasttimemessagewithperiod:(nsdate *)lastmessagedate {     nsdateformatter *dateformatter = [nsdateformatter new];     [dateformatter setdateformat:@"h:mm a"];     [dateformatter setlocale:[[nslocale alloc] initwithlocaleidentifier:@"en_us_posix"]];      return [dateformatter stringfromdate:lastmessagedate];; }

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