利用 NSDate 抓取今日時間

- (NSString *)todayDate

{

    NSDate *today = [NSDate date];    

    NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]autorelease];

    NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; 

    NSDateComponents *components = [gregorian components:unitFlags fromDate:today];

    return [NSString stringWithFormat:@"%.4d-%.2d-%.2d",[components year],[components month],[components day]];

}

- (NSString *)currTime

{

    NSDate *today = [NSDate date];    

    NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]autorelease];

    NSUInteger unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit; 

    NSDateComponents *components = [gregorian components:unitFlags fromDate:today];

    return [NSString stringWithFormat:@"%.2d:%.2d",[components hour],[components minute]];

}