Примеры кода в XCode: Выводим дату и время

// Get current date time
NSDate *currentDateTime = [NSDate date];

// Instantiate a NSDateFormatter
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

// Format to show day of the week Sat,11-12-2011 23:27:09
[dateFormatter setDateFormat:@"EEE,MM-dd-yyyy HH:mm:ss"];

// Get the date time in NSString
NSString *dateInStringFormated = [dateFormatter stringFromDate:currentDateTime];

NSLog(@"%@", dateInStringFormated);