ios 中有关当前日期，星期的获取

项目中用到了这些东西，分享出来让大家研究研究

//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: 在这一步耽误了不少时间!

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

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