- (NSString *)timeAgo:(NSDate *)compareDate{


   // NSDate *dd=@2015-05-27 11:15:05 +0000;

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];
  NSDate *date = [dateFormatter dateFromString:@"2015-05-27 11:15:05 +0000"];

    NSTimeInterval interval = [date timeIntervalSinceReferenceDate];
    interval = -[compareDate timeIntervalSinceNow];
    int temp = 0;
    NSString *result;
    if (interval < 60) {
        result = [NSString stringWithFormat:@"Just now"];   //less than a minute
    }else if((temp = interval/60) <60){
        result = [NSString stringWithFormat:@"%dm",temp];   //minutes ago
    }else if((temp = temp/60) <24){
        result = [NSString stringWithFormat:@"%dh",temp];   //hours ago
    }else{
        temp = temp / 24;
        result = [NSString stringWithFormat:@"%dd",temp];   //days ago
    }
    return  result;
}