注：返回的是数字1，2，。。。

+ (NSInteger)getWeekDayFordate

{

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

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

NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit |

NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

NSDate *now = [NSDate date];

// 在真机上需要设置区域，才能正确获取本地日期，天朝代码:zh_CN

calendar.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];

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

return [comps weekday] - 1;

}