iOS 分类收集
.h文件
#import
#define D_MINUTE60
#define D_HOUR3600
#define D_DAY86400
#define D_WEEK604800
#define D_YEAR31556926
@interfaceNSDate (Category)
/**
*
*当前时间转换为时间戳
*
*/
+ (NSString*)getNowTimeStamp;
/**
*
*时间戳转换为时间
*
*/
+ (NSString*)getNowTime: (NSString*)stamp;
/**
*
*得到当前时间，yyyy-MM-dd HH:mm:ss
*
*/
+(NSString*)getNowChinaTime;
- (NSString*)timeIntervalDescription;//距离当前的时间间隔描述
- (NSString*)minuteDescription;/*精确到分钟的日期描述*/
- (NSString*)formattedTime;
- (NSString*)formattedDateDescription;//格式化日期描述
- (double)timeIntervalSince1970InMilliSecond;
+ (NSDate*)dateWithTimeIntervalInMilliSecondSince1970:(double)timeIntervalInMilliSecond;
+ (NSString*)formattedTimeFromTimeInterval:(longlong)time;
// Relative dates from the current date
+ (NSDate*) dateTomorrow;
+ (NSDate*) dateYesterday;
+ (NSDate*) dateWithDaysFromNow: (NSInteger) days;
+ (NSDate*) dateWithDaysBeforeNow: (NSInteger) days;
+ (NSDate*) dateWithHoursFromNow: (NSInteger) dHours;
+ (NSDate*) dateWithHoursBeforeNow: (NSInteger) dHours;
+ (NSDate*) dateWithMinutesFromNow: (NSInteger) dMinutes;
+ (NSDate*) dateWithMinutesBeforeNow: (NSInteger) dMinutes;
// Comparing dates
- (BOOL) isEqualToDateIgnoringTime: (NSDate*) aDate;
- (BOOL) isToday;
- (BOOL) isTomorrow;
- (BOOL) isYesterday;
- (BOOL) isSameWeekAsDate: (NSDate*) aDate;
- (BOOL) isThisWeek;
- (BOOL) isNextWeek;
- (BOOL) isLastWeek;
- (BOOL) isSameMonthAsDate: (NSDate*) aDate;
- (BOOL) isThisMonth;
- (BOOL) isSameYearAsDate: (NSDate*) aDate;
- (BOOL) isThisYear;
- (BOOL) isNextYear;
- (BOOL) isLastYear;
- (BOOL) isEarlierThanDate: (NSDate*) aDate;
- (BOOL) isLaterThanDate: (NSDate*) aDate;
- (BOOL) isInFuture;
- (BOOL) isInPast;
// Date roles
- (BOOL) isTypicallyWorkday;
- (BOOL) isTypicallyWeekend;
// Adjusting dates
- (NSDate*) dateByAddingDays: (NSInteger) dDays;
- (NSDate*) dateBySubtractingDays: (NSInteger) dDays;
- (NSDate*) dateByAddingHours: (NSInteger) dHours;
- (NSDate*) dateBySubtractingHours: (NSInteger) dHours;
- (NSDate*) dateByAddingMinutes: (NSInteger) dMinutes;
- (NSDate*) dateBySubtractingMinutes: (NSInteger) dMinutes;
- (NSDate*) dateAtStartOfDay;
// Retrieving intervals
- (NSInteger) minutesAfterDate: (NSDate*) aDate;
- (NSInteger) minutesBeforeDate: (NSDate*) aDate;
- (NSInteger) hoursAfterDate: (NSDate*) aDate;
- (NSInteger) hoursBeforeDate: (NSDate*) aDate;
- (NSInteger) daysAfterDate: (NSDate*) aDate;
- (NSInteger) daysBeforeDate: (NSDate*) aDate;
- (NSInteger)distanceInDaysToDate:(NSDate*)anotherDate;
// Decomposing dates
@property(readonly)NSIntegernearestHour;
@property(readonly)NSIntegerhour;
@property(readonly)NSIntegerminute;
@property(readonly)NSIntegerseconds;
@property(readonly)NSIntegerday;
@property(readonly)NSIntegermonth;
@property(readonly)NSIntegerweek;
@property(readonly)NSIntegerweekday;
@property(readonly)NSIntegernthWeekday;// e.g. 2nd Tuesday of the month == 2
@property(readonly)NSIntegeryear;
@end
.m文件
#import"NSDate+Category.h"
#import"NSDateFormatter+Category.h"
#define DATE_COMPONENTS (NSYearCalendarUnit| NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekCalendarUnit |NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSWeekdayCalendarUnit | NSWeekdayOrdinalCalendarUnit)
#define CURRENT_CALENDAR [NSCalendar currentCalendar]
@implementationNSDate (Category)
+(NSString*)getNowTimeStamp {
NSDateFormatter*formatter = [[NSDateFormatteralloc]init];
[formattersetDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate*date = [NSDatedate];
NSTimeZone*zone = [NSTimeZonesystemTimeZone];
NSIntegerinterval = [zonesecondsFromGMTForDate:date];
NSDate*localeDate = [datedateByAddingTimeInterval: interval];
NSString*timeSp = [NSStringstringWithFormat:@"%ld",(long)[localeDatetimeIntervalSince1970]];
NSLog(@"当前时间的时间戳：%@",timeSp);
returntimeSp;
}
+ (NSString*)getNowTime: (NSString*)stamp{
NSTimeIntervaltime=[stampdoubleValue] ;//因为时差问题要加8小时== 28800 sec
NSDate*detaildate=[NSDatedateWithTimeIntervalSince1970:time];
NSLog(@"date:%@",[detaildatedescription]);
NSString*currentDateStr = [detaildatedescription];
return[currentDateStrsubstringToIndex:19];
}
+(NSString*)getNowChinaTime {
NSDate*date = [NSDatedate];
//如果这里转换了就是格林威治时间
//时区转换，取得系统时区，取得格林威治时间差秒
//NSTimeIntervaltimeZoneOffset=[[NSTimeZone systemTimeZone] secondsFromGMT];
////NSLog(@"%f",timeZoneOffset/60.0/60.0);
//
//date = [date dateByAddingTimeInterval:timeZoneOffset];
//格式化日期时间
NSDateFormatter*dateformatter=[[NSDateFormatteralloc]init];
[dateformattersetDateFormat:@"yyyyMMdd"];
NSString* dateStr=[dateformatterstringFromDate:date];
NSLog(@"当前时间：%@",dateStr);
returndateStr;
}
/*距离当前的时间间隔描述*/
- (NSString*)timeIntervalDescription
{
NSTimeIntervaltimeInterval = -[selftimeIntervalSinceNow];
if(timeInterval <60) {
returnNSLocalizedString(@"NSDateCategory.text1",@"");
}elseif(timeInterval <3600) {
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text2",@""), timeInterval /60];
}elseif(timeInterval <86400) {
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text3",@""), timeInterval /3600];
}elseif(timeInterval <2592000) {//30天内
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text4",@""), timeInterval /86400];
}elseif(timeInterval <31536000) {//30天至1年内
NSDateFormatter*dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text5",@"")];
return[dateFormatterstringFromDate:self];
}else{
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text6",@""), timeInterval /31536000];
}
}
/*精确到分钟的日期描述*/
- (NSString*)minuteDescription
{
NSDateFormatter*dateFormatter = [NSDateFormatterdateFormatterWithFormat:@"yyyy-MM-dd HH:mm:ss"];
NSString*theDay = [dateFormatterstringFromDate:self];//日期的年月日
NSString*currentDay = [dateFormatterstringFromDate:[NSDatedate]];//当前年月日
if([theDayisEqualToString:currentDay]) {//当天
[dateFormattersetDateFormat:@"ah:mm"];
return[dateFormatterstringFromDate:self];
}elseif([[dateFormatterdateFromString:currentDay]timeIntervalSinceDate:[dateFormatterdateFromString:theDay]] ==86400) {//昨天
[dateFormattersetDateFormat:@"ah:mm"];
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text7", @'"'), [dateFormatterstringFromDate:self]];
}elseif([[dateFormatterdateFromString:currentDay]timeIntervalSinceDate:[dateFormatterdateFromString:theDay]] <86400*7) {//间隔一周内
[dateFormattersetDateFormat:@"EEEE ah:mm"];
return[dateFormatterstringFromDate:self];
}else{//以前
[dateFormattersetDateFormat:@"yyyy-MM-dd ah:mm"];
return[dateFormatterstringFromDate:self];
}
}
/*标准时间日期描述*/
-(NSString*)formattedTime{
NSDateFormatter* formatter = [[NSDateFormatteralloc]init];
[formattersetDateFormat:@"YYYY-MM-dd"];
NSString* dateNow = [formatterstringFromDate:[NSDatedate]];
NSDateComponents*components = [[NSDateComponentsalloc]init];
[componentssetDay:[[dateNowsubstringWithRange:NSMakeRange(8,2)]intValue]];
[componentssetMonth:[[dateNowsubstringWithRange:NSMakeRange(5,2)]intValue]];
[componentssetYear:[[dateNowsubstringWithRange:NSMakeRange(0,4)]intValue]];
NSCalendar*gregorian = [[NSCalendaralloc]initWithCalendarIdentifier:NSGregorianCalendar];
NSDate*date = [gregoriandateFromComponents:components];//今天0点时间
NSIntegerhour = [selfhoursAfterDate:date];
NSDateFormatter*dateFormatter =nil;
NSString*ret =@"";
//hasAMPM==TURE为12小时制，否则为24小时制
NSString*formatStringForHours = [NSDateFormatterdateFormatFromTemplate:@"j"options:0locale:[NSLocalecurrentLocale]];
NSRangecontainsA = [formatStringForHoursrangeOfString:@"a"];
BOOLhasAMPM = containsA.location!=NSNotFound;
if(!hasAMPM) {//24小时制
if(hour <=24&& hour >=0) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:@"HH:mm"];
}elseif(hour <0&& hour >= -24) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text8",@"")];
}else{
dateFormatter = [NSDateFormatterdateFormatterWithFormat:@"yyyy-MM-dd"];
}
}else{
if(hour >=0&& hour <=6) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text9",@"")];
}elseif(hour >6&& hour <=11) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text10",@"")];
}elseif(hour >11&& hour <=17) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text11",@"")];
}elseif(hour >17&& hour <=24) {
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text12",@"")];
}elseif(hour <0&& hour >= -24){
dateFormatter = [NSDateFormatterdateFormatterWithFormat:NSLocalizedString(@"NSDateCategory.text13",@"")];
}else{
dateFormatter = [NSDateFormatterdateFormatterWithFormat:@"yyyy-MM-dd"];
}
}
ret = [dateFormatterstringFromDate:self];
returnret;
}
/*格式化日期描述*/
- (NSString*)formattedDateDescription
{
NSDateFormatter*dateFormatter = [[NSDateFormatteralloc]init];
[dateFormattersetDateFormat:@"yyyy-MM-dd"];
NSString*theDay = [dateFormatterstringFromDate:self];//日期的年月日
NSString*currentDay = [dateFormatterstringFromDate:[NSDatedate]];//当前年月日
NSIntegertimeInterval = -[selftimeIntervalSinceNow];
if(timeInterval <60) {
returnNSLocalizedString(@"NSDateCategory.text1",@"");
}elseif(timeInterval <3600) {//1小时内
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text2",@""), timeInterval /60];
}elseif(timeInterval <21600) {//6小时内
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text3",@""), timeInterval /3600];
}elseif([theDayisEqualToString:currentDay]) {//当天
[dateFormattersetDateFormat:@"HH:mm"];
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text14",@""), [dateFormatterstringFromDate:self]];
}elseif([[dateFormatterdateFromString:currentDay]timeIntervalSinceDate:[dateFormatterdateFromString:theDay]] ==86400) {//昨天
[dateFormattersetDateFormat:@"HH:mm"];
return[NSStringstringWithFormat:NSLocalizedString(@"NSDateCategory.text7",@""), [dateFormatterstringFromDate:self]];
}else{//以前
[dateFormattersetDateFormat:@"yyyy-MM-dd HH:mm"];
return[dateFormatterstringFromDate:self];
}
}
- (double)timeIntervalSince1970InMilliSecond {
doubleret;
ret = [selftimeIntervalSince1970] *1000;
returnret;
}
+ (NSDate*)dateWithTimeIntervalInMilliSecondSince1970:(double)timeIntervalInMilliSecond {
NSDate*ret =nil;
doubletimeInterval = timeIntervalInMilliSecond;
// judge if the argument is in secconds(for former data structure).
if(timeIntervalInMilliSecond >140000000000) {
timeInterval = timeIntervalInMilliSecond /1000;
}
ret = [NSDatedateWithTimeIntervalSince1970:timeInterval];
returnret;
}
+ (NSString*)formattedTimeFromTimeInterval:(longlong)time{
return[[NSDatedateWithTimeIntervalInMilliSecondSince1970:time]formattedTime];
}
#pragma mark Relative Dates
+ (NSDate*) dateWithDaysFromNow: (NSInteger) days
{
// Thanks, Jim Morrison
return[[NSDatedate]dateByAddingDays:days];
}
+ (NSDate*) dateWithDaysBeforeNow: (NSInteger) days
{
// Thanks, Jim Morrison
return[[NSDatedate]dateBySubtractingDays:days];
}
+ (NSDate*) dateTomorrow
{
return[NSDatedateWithDaysFromNow:1];
}
+ (NSDate*) dateYesterday
{
return[NSDatedateWithDaysBeforeNow:1];
}
+ (NSDate*) dateWithHoursFromNow: (NSInteger) dHours
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] +D_HOUR* dHours;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
+ (NSDate*) dateWithHoursBeforeNow: (NSInteger) dHours
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] -D_HOUR* dHours;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
+ (NSDate*) dateWithMinutesFromNow: (NSInteger) dMinutes
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] +D_MINUTE* dMinutes;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
+ (NSDate*) dateWithMinutesBeforeNow: (NSInteger) dMinutes
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] -D_MINUTE* dMinutes;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
#pragma mark Comparing Dates
- (BOOL) isEqualToDateIgnoringTime: (NSDate*) aDate
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:aDate];
return((components1.year== components2.year) &&
(components1.month== components2.month) &&
(components1.day== components2.day));
}
- (BOOL) isToday
{
return[selfisEqualToDateIgnoringTime:[NSDatedate]];
}
- (BOOL) isTomorrow
{
return[selfisEqualToDateIgnoringTime:[NSDatedateTomorrow]];
}
- (BOOL) isYesterday
{
return[selfisEqualToDateIgnoringTime:[NSDatedateYesterday]];
}
// This hard codes the assumption that a week is 7 days
- (BOOL) isSameWeekAsDate: (NSDate*) aDate
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:aDate];
// Must be same week. 12/31 and 1/1 will both be week "1" if they are in the same week
if(components1.week!= components2.week)returnNO;
// Must have a time interval under 1 week. Thanks @aclark
return(abs([selftimeIntervalSinceDate:aDate])
}
- (BOOL) isThisWeek
{
return[selfisSameWeekAsDate:[NSDatedate]];
}
- (BOOL) isNextWeek
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] +D_WEEK;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
return[selfisSameWeekAsDate:newDate];
}
- (BOOL) isLastWeek
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] -D_WEEK;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
return[selfisSameWeekAsDate:newDate];
}
// Thanks, mspasov
- (BOOL) isSameMonthAsDate: (NSDate*) aDate
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:NSYearCalendarUnit|NSMonthCalendarUnitfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:NSYearCalendarUnit|NSMonthCalendarUnitfromDate:aDate];
return((components1.month== components2.month) &&
(components1.year== components2.year));
}
- (BOOL) isThisMonth
{
return[selfisSameMonthAsDate:[NSDatedate]];
}
- (BOOL) isSameYearAsDate: (NSDate*) aDate
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:aDate];
return(components1.year== components2.year);
}
- (BOOL) isThisYear
{
// Thanks, baspellis
return[selfisSameYearAsDate:[NSDatedate]];
}
- (BOOL) isNextYear
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:[NSDatedate]];
return(components1.year== (components2.year+1));
}
- (BOOL) isLastYear
{
NSDateComponents*components1 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:self];
NSDateComponents*components2 = [CURRENT_CALENDARcomponents:NSYearCalendarUnitfromDate:[NSDatedate]];
return(components1.year== (components2.year-1));
}
- (BOOL) isEarlierThanDate: (NSDate*) aDate
{
return([selfcompare:aDate] ==NSOrderedAscending);
}
- (BOOL) isLaterThanDate: (NSDate*) aDate
{
return([selfcompare:aDate] ==NSOrderedDescending);
}
// Thanks, markrickert
- (BOOL) isInFuture
{
return([selfisLaterThanDate:[NSDatedate]]);
}
// Thanks, markrickert
- (BOOL) isInPast
{
return([selfisEarlierThanDate:[NSDatedate]]);
}
#pragma mark Roles
- (BOOL) isTypicallyWeekend
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:NSWeekdayCalendarUnitfromDate:self];
if((components.weekday==1) ||
(components.weekday==7))
returnYES;
returnNO;
}
- (BOOL) isTypicallyWorkday
{
return![selfisTypicallyWeekend];
}
#pragma mark Adjusting Dates
- (NSDate*) dateByAddingDays: (NSInteger) dDays
{
NSTimeIntervalaTimeInterval = [selftimeIntervalSinceReferenceDate] +D_DAY* dDays;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
- (NSDate*) dateBySubtractingDays: (NSInteger) dDays
{
return[selfdateByAddingDays: (dDays * -1)];
}
- (NSDate*) dateByAddingHours: (NSInteger) dHours
{
NSTimeIntervalaTimeInterval = [selftimeIntervalSinceReferenceDate] +D_HOUR* dHours;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
- (NSDate*) dateBySubtractingHours: (NSInteger) dHours
{
return[selfdateByAddingHours: (dHours * -1)];
}
- (NSDate*) dateByAddingMinutes: (NSInteger) dMinutes
{
NSTimeIntervalaTimeInterval = [selftimeIntervalSinceReferenceDate] +D_MINUTE* dMinutes;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
returnnewDate;
}
- (NSDate*) dateBySubtractingMinutes: (NSInteger) dMinutes
{
return[selfdateByAddingMinutes: (dMinutes * -1)];
}
- (NSDate*) dateAtStartOfDay
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
components.hour=0;
components.minute=0;
components.second=0;
return[CURRENT_CALENDARdateFromComponents:components];
}
- (NSDateComponents*) componentsWithOffsetFromDate: (NSDate*) aDate
{
NSDateComponents*dTime = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:aDatetoDate:selfoptions:0];
returndTime;
}
#pragma mark Retrieving Intervals
- (NSInteger) minutesAfterDate: (NSDate*) aDate
{
NSTimeIntervalti = [selftimeIntervalSinceDate:aDate];
return(NSInteger) (ti /D_MINUTE);
}
- (NSInteger) minutesBeforeDate: (NSDate*) aDate
{
NSTimeIntervalti = [aDatetimeIntervalSinceDate:self];
return(NSInteger) (ti /D_MINUTE);
}
- (NSInteger) hoursAfterDate: (NSDate*) aDate
{
NSTimeIntervalti = [selftimeIntervalSinceDate:aDate];
return(NSInteger) (ti /D_HOUR);
}
- (NSInteger) hoursBeforeDate: (NSDate*) aDate
{
NSTimeIntervalti = [aDatetimeIntervalSinceDate:self];
return(NSInteger) (ti /D_HOUR);
}
- (NSInteger) daysAfterDate: (NSDate*) aDate
{
NSTimeIntervalti = [selftimeIntervalSinceDate:aDate];
return(NSInteger) (ti /D_DAY);
}
- (NSInteger) daysBeforeDate: (NSDate*) aDate
{
NSTimeIntervalti = [aDatetimeIntervalSinceDate:self];
return(NSInteger) (ti /D_DAY);
}
// Thanks, dmitrydims
// I have not yet thoroughly tested this
- (NSInteger)distanceInDaysToDate:(NSDate*)anotherDate
{
NSCalendar*gregorianCalendar = [[NSCalendaralloc]initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents*components = [gregorianCalendarcomponents:NSDayCalendarUnitfromDate:selftoDate:anotherDateoptions:0];
returncomponents.day;
}
#pragma mark Decomposing Dates
- (NSInteger) nearestHour
{
NSTimeIntervalaTimeInterval = [[NSDatedate]timeIntervalSinceReferenceDate] +D_MINUTE*30;
NSDate*newDate = [NSDatedateWithTimeIntervalSinceReferenceDate:aTimeInterval];
NSDateComponents*components = [CURRENT_CALENDARcomponents:NSHourCalendarUnitfromDate:newDate];
returncomponents.hour;
}
- (NSInteger) hour
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.hour;
}
- (NSInteger) minute
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.minute;
}
- (NSInteger) seconds
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.second;
}
- (NSInteger) day
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.day;
}
- (NSInteger) month
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.month;
}
- (NSInteger) week
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.week;
}
- (NSInteger) weekday
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.weekday;
}
- (NSInteger) nthWeekday// e.g. 2nd Tuesday of the month is 2
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.weekdayOrdinal;
}
- (NSInteger) year
{
NSDateComponents*components = [CURRENT_CALENDARcomponents:DATE_COMPONENTSfromDate:self];
returncomponents.year;
}
@end
