获取当前日期是星期几

+(NSString *)getWeekday

{
NSDate *date = [NSDate date];
NSDateComponents *componets = [[NSCalendar autoupdatingCurrentCalendar] components:NSWeekdayCalendarUnit fromDate:date];
NSString *weekday = [self getWeekdayWithNumber:[componets weekday]];
return weekday;
}

//1代表星期日
+(NSString *)getWeekdayWithNumber:(int)number
{
switch (number) {
case 1:
return @"星期日";
break;
case 2:
return @"星期一";
break;
case 3:
return @"星期二";
break;
case 4:
return @"星期三";
break;
case 5:
return @"星期四";
break;
case 6:
return @"星期五";
break;
case 7:
return @"星期六";
break;
default:
return @"";
break;
}
}