NSDate increase classification calculate a certain day of the year

#import <Foundation/Foundation.h>

@interface NSDate (addition)

/**

* How many numbers a day in the month

*/

-(Nsinteger) Daysofcurrentmonth;

/**

* The first day of the month of the week

*

*/

-(Nsinteger) Weekoffirstdayincurrentmonth;

-(Nsinteger) day;

-(Nsinteger) month;

-(Nsinteger) year;

-(NSString *) Datestrwithformat: (NSString *) format;

-(Nstimeinterval) Zerotimestamp;

@end

#import "Nsdate+addition.h"

@implementation NSDate (addition)

-(Nsinteger) Daysofcurrentmonth

{

Nsinteger days = 0;

Nscalendar *calendar = [[Nscalendar alloc] Initwithcalendaridentifier:nscalendaridentifiergregorian];

days = [Calendar Rangeofunit:nscalendarunitday inunit:nscalendarunitmonth fordate:self].length;

return days;

}

-(Nsinteger) Weekoffirstdayincurrentmonth

{

Nsinteger week = 0;

Nscalendar *calendar = [[Nscalendar alloc] Initwithcalendaridentifier:nscalendaridentifiergregorian];

Week = [Calendar Ordinalityofunit:nscalendarunitday inunit:nscalendarunitweekofmonth fordate:self]-1;

Return week;

}

-(Nsinteger) Day

{

Nsinteger day = 1;

Nscalendar *calendar = [[Nscalendar alloc] Initwithcalendaridentifier:nscalendaridentifiergregorian];

Day = [Calendar Ordinalityofunit:nscalendarunitday inunit:nscalendarunitmonth fordate:self];

Return day;

}

-(Nsinteger) month

{

Nsinteger month = 1;

Nscalendar *calendar = [[Nscalendar alloc] Initwithcalendaridentifier:nscalendaridentifiergregorian];

month = [Calendar Ordinalityofunit:nscalendarunitmonth inunit:nscalendarunityear fordate:self];

Return month;

}

-(Nsinteger) year

{

Nsinteger year = 2015;

Nscalendar *calendar = [[Nscalendar alloc] Initwithcalendaridentifier:nscalendaridentifiergregorian];

Year = [Calendar Ordinalityofunit:nscalendarunityear inunit:nscalendarunitera fordate:self];

Return year;

}

-(NSString *) Datestrwithformat: (NSString *) format

{

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

Formatter.dateformat = format;

return [formatter stringfromdate:self];

}

-(Nstimeinterval) Zerotimestamp

{

Nstimeinterval timeinterval = 0;

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

Formatter.dateformat = @ "YYYY-MM-DD";

NSString *zerotimestr = [Formatter stringfromdate:self];

NSDate *zerodate = [Formatter datefromstring:zerotimestr];

TimeInterval = [Zerodate timeIntervalSince1970];

return timeinterval;

}

It is especially important to make the calendar a time-of-day classification.

NSDate increase classification calculate a certain day of the year