ios - 24 hour time from date string -

i trying time , in 24 hour format following string :

7/2/2015 2:30:00 pm

this have tried :

-(nsstring*)returndate:(nsstring*)datestring {      nsdateformatter *dateformatter1 = [[nsdateformatter alloc] init];     [dateformatter1 setdateformat:@"mm/dd/yyyy hh:mm:ss aaa"];     nsdate *date = [dateformatter1 datefromstring:datestring];     datestring = [date descriptionwithlocale:[nslocale systemlocale]];        nstimezone *currenttimezone = [nstimezone localtimezone];     nstimezone *utctimezone = [nstimezone timezonewithabbreviation:@"utc"];      nsinteger currentgmtoffset = [currenttimezone secondsfromgmtfordate:date];     nsinteger gmtoffset = [utctimezone secondsfromgmtfordate:date];     nstimeinterval gmtinterval = currentgmtoffset - gmtoffset;      nsdate *destinationdate = [[nsdate alloc] initwithtimeinterval:gmtinterval sincedate:date];      nsdateformatter *dateformatters = [[nsdateformatter alloc] init];     [dateformatters setdateformat:@"hh:mm a"];     [dateformatters setdatestyle:nsdateformattershortstyle];     [dateformatters settimestyle:nsdateformattershortstyle];     [dateformatters setdoesrelativedateformatting:yes];     [dateformatters settimezone:[nstimezone systemtimezone]];     datestring = [dateformatters stringfromdate: destinationdate];      return datestring; } 

output : 4:30

this returning correct time in 12 hour format. want time in 24 hour format.

desired output : 16:30

there way code in question, try this:

nsstring *datestring = @"7/2/2015 4:30:00 pm";  nsdateformatter *dateformatter = [[nsdateformatter alloc] init]; [dateformatter settimezone:[nstimezone systemtimezone]];  [dateformatter setdateformat:@"mm/dd/yyyy hh:mm:ss aaa"]; nsdate *date = [dateformatter datefromstring:datestring];  [dateformatter setdateformat:@"hh:mm"]; datestring = [dateformatter stringfromdate: date];  nslog(@"datestring: %@", datestring); 

output:

datestring: 16:30