mac 获取当前时间

//initializtion parameter

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *now;
NSDateComponents *comps = [[NSDateComponents alloc] init];
NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | 
                                         NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
now=[NSDate date];
comps = [calendar components:unitFlags fromDate:now];
week = [comps weekday];    
month = [comps month];
day = [comps day];
hour = [comps hour];
min = [comps minute];
sec = [comps second];

//Week:
1 －－星期天
2－－星期一
3－－星期二
4－－星期三
5－－星期四
6－－星期五
7－－星期六

记录下, 

转载http://www.cocoachina.com/bbs/read.php?tid-3377.html

我实际使用的方法

        NSDate * date = [NSDate date];
        
        //设置时间输出格式：
        NSDateFormatter * df = [[NSDateFormatter alloc] init ];
        [df setDateFormat:@"yyyy年MM月dd日 HH小时mm分ss秒"];
        NSString * na = [df stringFromDate:date];