Foundation Framework-NSDate class

NSDate class

////  main.m//  8.NSDate////  Created by wangzhaolu on 14-2-25.//  Copyright (c) 2014年 Turing. All rights reserved.//#import <Foundation/Foundation.h>staticvoid transTimeZone(NSString* currDateStr);int main(intconstchar * argv[]) {    @autoreleasepool {

Nstimeinterval time interval

        //Get the current date in two ways:        //nsdate* date =[[nsdate alloc]init];        NSLog(@"******************** nstimeinterval **********************");//@property (readonly) nstimeinterval Timeintervalsincenow        NSDate* date = [NSDateDate];NSLog(@"Current time:%@", date);//Current time to present time interval (theoretical value is 0)        NstimeintervalDateintvl=[date Timeintervalsincenow];NSLog(@"Current time to Present time:%f", DATEINTVL);//From 1970 to the present time intervalDateintvl=[date timeIntervalSince1970];NSLog(@"From 1970 to the present time:%f", DATEINTVL);//From the Apple reference time to the current time intervalDateintvl=[date Timeintervalsincereferencedate];NSLog(@"from the Apple reference time to the present time:%fu", DATEINTVL);//From now on 2 days after the time        NstimeintervalNextintvl=2* -* -* -;NSDate* next=[NSDateDATEWITHTIMEINTERVALSINCENOW:NEXTINTVL];NSLog(@"2 days from now:%@", next);

NSDateFormatter date Formatting

       NSLog(@"*********** nsdateformatter date formatting *********************");NSDate* curdate=[NSDateNEW]; nsdateformatter* Fmt=[[nsdateformatter Alloc]init];//datestyle System date formatFmt. Datestyle=nsdateformattershortstyle;//14-12-26Fmt. Datestyle=nsdateformatterlongstyle;//December 26, 2014Fmt. Datestyle=nsdateformatterfullstyle;//Friday, December 26, 2014        NSString* Fmtstr=[fmt Stringfromdate:curdate];NSLog(@"Date after formatting:%@", FMTSTR); nsdateformatter* Fmt1=[[nsdateformatter Alloc]init];//dateformat Custom date formatsFmt1. DateFormat[Email protected]"Yyyy/mm/dd hh:mm";//2014/12/26 11:57Fmt1. DateFormat[Email protected]"Yyyy-mm-dd hh:mm:ss";//2014-12-26 11:57:30Fmt1. DateFormat[Email protected]yyyy mm month dd Day hh mm min ss sec sssss;//2014y12m26 Day 12:01 52 sec 15700Fmt1. DateFormat[Email protected]"yy. Mm.dd HH.MM.SS ";NSString* FMTSTR1=[FMT1 Stringfromdate:curdate];NSLog(@"Date after formatting:%@", FMTSTR1);//Convert string format to date format        NSString* [Email protected]"1980-12-15"; nsdateformatter* Df=[nsdateformatter New];NSString* [Email protected]"Yyyy-mm-dd"; Df. DateFormat=DATEFMT; Df. TimeZone=[nstimezone timezonewithname:@"Europe/london"];NSDate* DT=[DF Datefromstring:source];//Output time stamp        NstimeintervalIntvl=[dt Timeintervalsincereferencedate];NSLog(@"The converted time is:%@, timestamp:%f", DT,INTVL);

Nstimezone Time Zone Conversion

         NSLog(@"****************** NSTimeZone 时区转换********************");        //遍历时区对象NSTimeZone        NSArray* zoneNames=[NSTimeZone knownTimeZoneNames];        for (int i=0; i<zoneNames.count; i++) {           NSLog(@"%@",zoneNames[i]);        }        //调用时区转换函数        transTimeZone(@"2008-8-8 20:08:08");

//time zone conversionStatic voidTranstimezone (NSString* Currdatestr) {NSDate* currdate=Nil;NSLog(@"Beijing Time:%@", CURRDATESTR);    NSDateFormatter *fmt3=[nsdateformatter New]; Fmt3. DateFormat[Email protected]"Yyyy-mm-dd HH:mm:ss"; Currdate =[fmt3 DATEFROMSTRING:CURRDATESTR];//Beijing time converted to Tokyo timeFmt3. TimeZone=[nstimezone timezonewithname:@"Asia/tokyo"];NSString* Zonetransed=[fmt3 Stringfromdate:currdate];NSLog(@"Tokyo Time:%@", zonetransed);//Beijing time to New York time FFFmt3. TimeZone=[nstimezone timezonewithname:@"Europe/moscow"];NSString* Zonetransed1=[fmt3 Stringfromdate:currdate];NSLog(@"Mexico Time:%@", zoneTransed1);//Beijing time conversion to New York timeFmt3. TimeZone=[nstimezone timezonewithname:@"America/new_york"];NSString* Zonetransed2=[fmt3 Stringfromdate:currdate];NSLog(@"New York Time:%@", zoneTransed2);}

Nscalendar Calendar and Date

 NSLog(@"****************** Nscalendar Calendar and date *******************");NSString* [Email protected]"2014-2-14";        nsdateformatter* Df2=[nsdateformatter New]; Df2. DateFormat[Email protected]"Yyyy-mm-dd";//What is the date of the last day of the month? (Ask how many days this month)        Nscalendar* cal=[NscalendarCurrentcalendar];NSDate* Date1 =[DF2 Datefromstring:source1];//smaller = day (nscalendarunitday)        //larger = month (nscalendarunitmonth)        NsrangeRng=[cal rangeofunit:nscalendarunitday Inunit:nscalendarunitmonth fordate:date1];NSLog(@"%@ A total of%ld days this month.", source1,rng. Length);//Set the first day of the week 1=sunday 2=monday[Cal Setfirstweekday:2];//What day of the week is it? Nsuinteger day=[cal ordinalityofunit:nscalendarunitday inunit:nsweekcalendarunit ForD ATE:DATE1];NSLog(@"Today is the week:%lu", day);

Nsdatecomponents the value of the obtained date

NSLog(@"*********** nsdatecomponents to obtain the value of the date *************");//Get the value of the date by nsdatecomponents (| "or")Nscalendarunit units=nscalendarunitday| Nscalendarunitmonth | nscalendarunitweekday|        Nscalendarunityear; nsdatecomponents* ncp=[cal components:units fromdate:date1];NSLog(@"Output ncp:%@"Ncp. Description);//What day of the week is the next month? Ncp. Month+=1;NSDate* Newdate =[cal DATEFROMCOMPONENTS:NCP]; Nsuinteger newday=[cal Ordinalityofunit:nscalendarunitday Inunit:nsweekcalendaruni T fordate:newdate];NSLog(@"next month's Today [%@] is week:%lu", [DF Stringfromdate:newdate],newday); }

Foundation Framework-NSDate class