Question

I am trying to show time on graph and i have a full time stamp in this @”2012-08-28 18:50:24″ format. when i try to get time from this date then it returns nil in NSDate.

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"HH:mm:ss"];
    NSDate *time = [formatter dateFromString:@"2012-08-28 18:50:24"];

in this code only if I change [formatter setDateFormat:@"HH:mm:ss"]; line to [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; then it starts working with full date and time. But i need only time

Answer 1

First you have converted your string date and time in the date formate..

YourTimeStr = @"2012-08-28 18:50:24";  

  NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat = @"yyyy-mm-dd HH:mm:ss";
    NSDate *DateAndTime = [formatter dateFromString:LogOutTimeSTR];

then

NSDateFormatter *dateFormatter1 = [[[NSDateFormatter alloc] init] autorelease];
    [dateFormatter1 setDateFormat:@"HH:mm:ss"];
    [dateFormatter1 setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];

    NSString *YourTimeStr =[dateFormatter1 stringFromDate:DateAndTime];