get current time

NSCalendar *calendar= [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

NSCalendarUnit unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |

NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit |

NSSecondCalendarUnit;

NSDate *date = [NSDate date];

NSDateComponents *dateComponents = [calendar components:unitFlags

fromDate:date];

NSInteger year = [dateComponents year];

NSInteger month = [dateComponents month];

NSInteger day = [dateComponents day];

NSInteger hour = [dateComponents hour];

NSInteger minute = [dateComponents minute];

[calendar release];