How to pass a string of numbers into time in ios

// Convert the number into the following time:

NSString * time = @" 1329038338 ";

NSDateFormatter * formatter = [[NSDateFormatter alloc] init] autorelease];
[Formatter setDateStyle: NSDateFormatterMediumStyle];
[Formatter setTimeStyle: nsdateformatter1_style];
[Formatter setDateFormat: @ "YYYY-MM-dd HH: mm"];
NSDate * confromTimesp = [NSDate dateWithTimeIntervalSince1970 :( NSTimeInterval) [time intValue];
NSString * confromTimespStr = [formatter stringFromDate: confromTimesp];

TimeString = confromTimespStr;

// Convert the time to a number as follows:

NSDate * date = [NSDatedate];

NSDateFormatter * formatter1 = [[NSDateFormatteralloc] init] autorelease];

[Formatter1 setDateStyle: NSDateFormatterMediumStyle];

[Formatter1 setTimeStyle: nsdateformatter1_style];

[Formatter1 setDateFormat: @ "YYYY-MM-dd HH: mm"];

NSString * timesp = [NSStringstringWithFormat: @ "% lld", (longlong) [datetimeIntervalSince1970];

NSLog (@ "++ % @", timesp );