iOS中通过NSDate获取星期几、星期的方法

    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];

    

    NSLog(@"-----------weekday is %d",[comps weekday]);//在这里需要注意的是：星期日是数字1，星期一时数字2，以此类推。。。

    NSLog(@"-----------month is %d",[comps month]);

    NSLog(@"-----------day is %d",[comps day]);

    NSLog(@"-----------weekdayOrdinal is %d",[comps weekdayOrdinal]);