iOS获取当前 年月日和星期

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NSArray * arrWeek=[NSArray arrayWithObjects:@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六", nil];

NSDate *date = [NSDate date]; 

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

NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease]; 

NSInteger unitFlags = NSYearCalendarUnit | 

NSMonthCalendarUnit | 

NSDayCalendarUnit | 

NSWeekdayCalendarUnit | 

NSHourCalendarUnit | 

NSMinuteCalendarUnit | 

NSSecondCalendarUnit; 

comps = [calendar components:unitFlags fromDate:date]; 

int week = [comps weekday]; 

int year=[comps year]; 

int month = [comps month]; 

int day = [comps day]; 

m_labDate.text=[NSString stringWithFormat:@"%d年%d月",year,month];

m_labToday.text=[NSString stringWithFormat:@"%d",day];

m_labWeek.text=[NSString stringWithFormat:@"%@",[arrWeek objectAtIndex:week]];