Работа с компонентами NSDate в Swift
у меня есть дата, которую мне нужно разделить на некоторые компоненты. например
let components = NSCalendarUnit.CalendarUnitDay | NSCalendarUnit.CalendarUnitHour
let date = calendar.components(components, fromDate: aDate, toDate: NSDate(), options: nil)
var dateToPrint = "(date.day) days (date.hour) hours"
dateToPrint будет количество дней и часов от aDate до настоящего времени. Но если я хочу количество недель вместо дней
let components = NSCalendarUnit.CalendarUnitWeek | NSCalendarUnit.CalendarUnitHour
let date = calendar.components(components, fromDate: aDate, toDate: NSDate(), options: nil)
var dateToPrint = "(date.week) weeks (date.hour) hours"
дата.недели не существует. Так как я могу это решить?
4 ответов
Xcode 8.3.2 * Swift 3.1
extension Date {
func xDays(_ x: Int) -> Date {
return Calendar.current.date(byAdding: .day, value: x, to: self)!
}
func xWeeks(_ x: Int) -> Date {
return Calendar.current.date(byAdding: .weekOfYear, value: x, to: self)!
}
var weeksHoursFromToday: DateComponents {
return Calendar.current.dateComponents( [.weekOfYear, .hour], from: self, to: Date())
}
var relativeDateString: String {
var result = ""
if let weeks = weeksHoursFromToday.weekOfYear,
let hours = weeksHoursFromToday.hour,
weeks > 0 {
result += "\(weeks) week"
if weeks > 1 { result += "s" }
if hours > 0 { result += " and " }
}
if let hours = weeksHoursFromToday.hour, hours > 0 {
result += "\(hours) hour"
if hours > 1 { result += "s" }
}
return result
}
}
let today = Date() // "May 1, 2017, 9:29 PM"
let yesterday = Date().xDays(-1) // "Apr 30, 2017, 9:29 PM"
let twoWeeksAgo = Date().xWeeks(-2) // "Apr 17, 2017, 9:29 PM"
let anotherDate = DateComponents(calendar: .current, year: 2013, month: 12, day: 4).date! // "Dec 4, 2013, 12:00 AM"
let anotherDate2 = DateComponents(calendar: .current, year: 2012, month: 12, day: 3).date! // "Dec 3, 2012, 12:00 AM"
yesterday.relativeDateString // "24 hours"
twoWeeksAgo.relativeDateString // "2 weeks"
anotherDate.relativeDateString // "177 weeks and 141 hours"
anotherDate2.relativeDateString // "230 weeks and 21 hours"
yesterday.relativeDateString // "24 hours"
twoWeeksAgo.relativeDateString // "2 weeks"
anotherDate.relativeDateString // "177 weeks and 141 hours"
anotherDate2.relativeDateString // "230 weeks and 21 hours"
мне понравился API в решении Лео и использовал его. Однако я столкнулся с проблемой, когда я запустил его (Jun 13, 2015 9:33 AM PST). Симптомы были:
когда дата находится в будущем, функция xFromToday возвращается результаты по запросу - (t-delta) (например, за 1 месяц в будущем Функции XFromToday будут возвращать (0, -4, -29, -719, -43199) для x=(месяц,неделя,дни, часы, минуты). Строка relativeDates вернется " через 1 неделю с сегодняшнего дня"
когда дата находится в прошлом, результаты будут для -t, за исключением для относительной строки даты. Например, в течение одного месяца в прошлом я будет вам (1, 4, 31, 744, 44640). Относительная строка даты была: "4 недели и 744 часа"
Я не могу вставить тестовый вывод из-за конфиденциальности, но код с NSDate.тест() вставляется. У него также есть несколько других вещей, заимствованных из другого сообщения (цитируемого в коде), и некоторые материалы форматирования I писал.
import Foundation
// https://stackoverflow.com/questions/27339072/working-with-nsdate-components-in-swift
// **** Use with caution may not do what you expect. See the stackoverflow post above. *******
public extension NSDate {
func xDays(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitDay, value: x, toDate: self, options: nil)!
}
func xWeeks(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitWeekOfYear, value: x, toDate: self, options: nil)!
}
func xMonths(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMonth, value: x, toDate: self, options: nil)!
}
func xMins(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMinute, value: x, toDate: self, options: nil)!
}
func xHours(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitHour, value: x, toDate: self, options: nil)!
}
var hoursFromToday: Int{
return NSCalendar.currentCalendar().components(.CalendarUnitHour, fromDate: self, toDate: NSDate(), options: nil).hour
}
var weeksFromToday: Int{
return NSCalendar.currentCalendar().components(.CalendarUnitWeekOfYear, fromDate: self, toDate: NSDate(), options: nil).weekOfYear
}
var daysFromToday: Int{
return NSCalendar.currentCalendar().components(.CalendarUnitDay, fromDate: self, toDate: NSDate(), options: nil).day
}
var monthsFromToday: Int{
return NSCalendar.currentCalendar().components(.CalendarUnitMonth, fromDate: self, toDate: NSDate(), options: nil).month
}
var minsFromToday: Int{
return NSCalendar.currentCalendar().components(.CalendarUnitMinute, fromDate: self, toDate: NSDate(), options: nil).minute
}
var relativeDateString: String {
if weeksFromToday > 0 { return weeksFromToday > 1 ? "\(weeksFromToday) weeks and \(hoursFromToday) hours" : "\(weeksFromToday) week and \(hoursFromToday) hours" }
if hoursFromToday > 0 { return hoursFromToday > 1 ? "\(hoursFromToday) hours" : "\(hoursFromToday) hour" }
return ""
}
//Date Comparisions
//https://stackoverflow.com/questions/26198526/nsdate-comparison-using-swift
func isGreaterThanDate(dateToCompare : NSDate) -> Bool
{
//Declare Variables
var isGreater = false
//Compare Values
if self.compare(dateToCompare) == NSComparisonResult.OrderedDescending
{
isGreater = true
}
//Return Result
return isGreater
}
func isLessThanDate(dateToCompare : NSDate) -> Bool
{
//Declare Variables
var isLess = false
//Compare Values
if self.compare(dateToCompare) == NSComparisonResult.OrderedAscending
{
isLess = true
}
//Return Result
return isLess
}
// Date printing converstions
var dayMonthYear: String {
let dateMonthYearFormatter: NSDateFormatter = NSDateFormatter()
let currentLocale: NSLocale = NSLocale.currentLocale()
let dateMonthYearFormatString: NSString! = NSDateFormatter.dateFormatFromTemplate("EdMMMyyyy",options: 0, locale: currentLocale)
dateMonthYearFormatter.dateFormat = dateMonthYearFormatString as! String
return dateMonthYearFormatter.stringFromDate(self)
}
var timeDayMonthYear: String {
let dateMonthYearFormatter: NSDateFormatter = NSDateFormatter()
let currentLocale: NSLocale = NSLocale.currentLocale()
let dateMonthYearFormatString: NSString! = NSDateFormatter.dateFormatFromTemplate("EdMMMyyyy' ' HH':'mm",options: 0, locale: currentLocale)
dateMonthYearFormatter.dateFormat = dateMonthYearFormatString as! String
return dateMonthYearFormatter.stringFromDate(self)
}
var hourMin: String {
let hourMinFormatter = NSDateFormatter();
hourMinFormatter.dateFormat = "HH:mm"
return hourMinFormatter.stringFromDate(self)
}
static func rfc3339DateFormatter() -> NSDateFormatter {
let rfc3339DateFormatterRet = NSDateFormatter()
let enUSPOSIXLocale: NSLocale = NSLocale(localeIdentifier: "en_US_POSIX")
rfc3339DateFormatterRet.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'"
rfc3339DateFormatterRet.locale = enUSPOSIXLocale
rfc3339DateFormatterRet.timeZone = NSTimeZone(forSecondsFromGMT: 0)
return rfc3339DateFormatterRet
}
var rfcString: String {
return NSDate.rfc3339DateFormatter().stringFromDate(self)
}
func rfcDate(rfcString: String) -> NSDate {
return NSDate.rfc3339DateFormatter().dateFromString(rfcString)!
}
func changeDate(toDate: NSDate) -> NSDate {
let rfcToDate = toDate.rfcString
let rfcSelf = self.rfcString
let toDateArray : [String] = rfcToDate.componentsSeparatedByString("T")
let selfArray : [String] = rfcSelf.componentsSeparatedByString("T")
return rfcDate(toDateArray[0]+"T"+selfArray[1])
}
static func test(months: Int = 0, weeks: Int = 0, days: Int = 0, hrs: Int = 0, mins: Int = 0) {
NSLog("****************** Start Testing of NSDate **************************")
NSLog("Inputs: months:\(months) weeks:\(weeks) days:\(days) hrs: \(hrs) mins: \(mins)")
var today = NSDate()
NSLog("Today is: \(today.timeDayMonthYear)")
var monthsFromToday = today.xMonths(months)
NSLog("** \(months) months from today: \(monthsFromToday.timeDayMonthYear)")
NSLog("monthsFromToday returns: \(monthsFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(monthsFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(monthsFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(monthsFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(monthsFromToday.minsFromToday)");
NSLog("relativeDateString returns: \(monthsFromToday.relativeDateString)")
var weeksFromToday = today.xWeeks(weeks)
NSLog("** \(weeks) weeks from today: \(weeksFromToday.timeDayMonthYear)")
NSLog("weeksFromToday returns: \(weeksFromToday.weeksFromToday)");
NSLog("relativeDateString returns: \(weeksFromToday.relativeDateString)")
var daysFromToday = today.xDays(days)
NSLog("** \(days) days from today: \(daysFromToday.timeDayMonthYear)")
NSLog("daysFromToday returns: \(daysFromToday.daysFromToday)");
NSLog("relativeDateString returns: \(daysFromToday.relativeDateString)")
var hrsFromToday = today.xHours(hrs)
NSLog("** \(hrs) hours from today: \(hrsFromToday.timeDayMonthYear)")
NSLog("hoursFromToday returns: \(hrsFromToday.hoursFromToday)");
NSLog("relativeDateString returns: \(hrsFromToday.relativeDateString)")
var minsFromToday = today.xMins(mins)
NSLog("** \(mins) minutes from today: \(minsFromToday.timeDayMonthYear)")
NSLog("minsFromToday returns: \(minsFromToday.minsFromToday)");
NSLog("relativeDateString returns: \(minsFromToday.relativeDateString)")
NSLog("__________________ End Testing of NSDate _________________________")
}
}
вот "исправление", которое я сделал. Я добавил функцию santizedDates (), которая возвращает даты "from" и "to", и множитель знака (+1/-1). 1-минутное смещение добавляется к диапазону дат, если сравнение было в будущем . Это работает для тестового случая. Также производит правильный и читаемый человеком вывод из relativeDateString (capitalizeFirst:Bool=false), такой как: "сегодня, 1 час 1 минута в прошлом" . Я разместил вопрос о почему это поведение происходит в первую очередь здесь:
NSCalendar.комплектующие.)(минута, возвращающая несогласованные значения
import Foundation
// https://stackoverflow.com/questions/27339072/working-with-nsdate-components-in-swift
public extension NSDate {
func xDays(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitDay, value: x, toDate: self, options: nil)!
}
func xWeeks(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitWeekOfYear, value: x, toDate: self, options: nil)!
}
func xMonths(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMonth, value: x, toDate: self, options: nil)!
}
func xMins(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitMinute, value: x, toDate: self, options: nil)!
}
func xHours(x:Int) -> NSDate {
return NSCalendar.currentCalendar().dateByAddingUnit(.CalendarUnitHour, value: x, toDate: self, options: nil)!
}
var hoursFromToday: Int{
var fromDate: NSDate = self
var toDate: NSDate = NSDate()
var sign: Int = -1
(fromDate,toDate, sign) = self.sanitizedDates()
return (sign * NSCalendar.currentCalendar().components(.CalendarUnitHour, fromDate: fromDate, toDate: toDate, options: nil).hour)
}
var weeksFromToday: Int{
var fromDate: NSDate = self
var toDate: NSDate = NSDate()
var sign: Int = -1
(fromDate,toDate,sign) = self.sanitizedDates()
return (sign * NSCalendar.currentCalendar().components(.CalendarUnitWeekOfYear, fromDate: fromDate, toDate: toDate, options: nil).weekOfYear)
}
var daysFromToday: Int{
var fromDate: NSDate = self
var toDate: NSDate = NSDate()
var sign: Int = -1
(fromDate,toDate, sign) = self.sanitizedDates()
return (sign * NSCalendar.currentCalendar().components(.CalendarUnitDay, fromDate: fromDate, toDate: toDate, options: nil).day)
}
var monthsFromToday: Int{
var fromDate: NSDate = self
var toDate: NSDate = NSDate()
var sign: Int = -1
(fromDate,toDate, sign) = self.sanitizedDates()
return (sign * NSCalendar.currentCalendar().components(.CalendarUnitMonth, fromDate: fromDate, toDate: toDate, options: nil).month)
}
var minsFromToday: Int{
var fromDate: NSDate = self
var toDate: NSDate = NSDate()
var sign: Int = -1
var offset: Int = 0
(fromDate,toDate,sign) = self.sanitizedDates()
return ( sign * NSCalendar.currentCalendar().components(.CalendarUnitMinute, fromDate: fromDate, toDate: toDate, options: nil).minute)
}
func relativeDateString(capitalizeFirst:Bool = false) -> String {
let days: Int = daysFromToday
let mins: Int = minsFromToday % 60
let tense: String = (minsFromToday > 0) ? " in the future" : " in the past"
let hrs: Int = hoursFromToday % 24
var retString = (capitalizeFirst) ? "Now" : "now"
if(minsFromToday != 0) {
if(days == 0) {
retString = (capitalizeFirst) ? "Today" : "today"
retString = (mins != 0 || hrs != 0) ? retString+"," : retString
}
else {
let absDays = abs(days)
retString = "\(absDays)"
retString += (absDays > 1) ? " days" : " day"
}
if(hrs != 0) {
let absHrs = abs(hrs)
retString += " \(absHrs)"
retString += (absHrs > 1) ? " hours" : " hour"
}
if(mins != 0) {
let absMins = abs(mins)
retString += " \(absMins)"
retString += (absMins > 1) ? " minutes" : " minute"
}
retString += tense
}
return retString
}
//Date Comparisons
//https://stackoverflow.com/questions/26198526/nsdate-comparison-using-swift
func isGreaterThanDate(dateToCompare : NSDate) -> Bool
{
//Declare Variables
var isGreater = false
//Compare Values
if self.compare(dateToCompare) == NSComparisonResult.OrderedDescending
{
isGreater = true
}
//Return Result
return isGreater
}
func isLessThanDate(dateToCompare : NSDate) -> Bool
{
//Declare Variables
var isLess = false
//Compare Values
if self.compare(dateToCompare) == NSComparisonResult.OrderedAscending
{
isLess = true
}
//Return Result
return isLess
}
// Date printing converstions
var dayMonthYear: String {
let dateMonthYearFormatter: NSDateFormatter = NSDateFormatter()
let currentLocale: NSLocale = NSLocale.currentLocale()
let dateMonthYearFormatString: NSString! = NSDateFormatter.dateFormatFromTemplate("EdMMMyyyy",options: 0, locale: currentLocale)
dateMonthYearFormatter.dateFormat = dateMonthYearFormatString as! String
return dateMonthYearFormatter.stringFromDate(self)
}
var timeDayMonthYear: String {
let dateMonthYearFormatter: NSDateFormatter = NSDateFormatter()
let currentLocale: NSLocale = NSLocale.currentLocale()
let dateMonthYearFormatString: NSString! = NSDateFormatter.dateFormatFromTemplate("EdMMMyyyy' ' HH':'mm",options: 0, locale: currentLocale)
dateMonthYearFormatter.dateFormat = dateMonthYearFormatString as! String
return dateMonthYearFormatter.stringFromDate(self)
}
var hourMin: String {
let hourMinFormatter = NSDateFormatter();
hourMinFormatter.dateFormat = "HH:mm"
return hourMinFormatter.stringFromDate(self)
}
static func rfc3339DateFormatter() -> NSDateFormatter {
let rfc3339DateFormatterRet = NSDateFormatter()
let enUSPOSIXLocale: NSLocale = NSLocale(localeIdentifier: "en_US_POSIX")
rfc3339DateFormatterRet.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'"
rfc3339DateFormatterRet.locale = enUSPOSIXLocale
rfc3339DateFormatterRet.timeZone = NSTimeZone(forSecondsFromGMT: 0)
return rfc3339DateFormatterRet
}
var rfcString: String {
return NSDate.rfc3339DateFormatter().stringFromDate(self)
}
func rfcDate(rfcString: String) -> NSDate {
return NSDate.rfc3339DateFormatter().dateFromString(rfcString)!
}
func changeDate(toDate: NSDate) -> NSDate {
let rfcToDate = toDate.rfcString
let rfcSelf = self.rfcString
let toDateArray : [String] = rfcToDate.componentsSeparatedByString("T")
let selfArray : [String] = rfcSelf.componentsSeparatedByString("T")
return rfcDate(toDateArray[0]+"T"+selfArray[1])
}
private func sanitizedDates() -> (fromDate: NSDate, toDate: NSDate, sign: Int ) {
var toDate: NSDate = self
var fromDate: NSDate = NSDate()
var sign: Int = 1
// For toDates in the past, results are reasonable, except for sign.
//In future dates, we to flip dates to make them past dates and add 1 minute for unknown reason.
if(toDate.isGreaterThanDate(fromDate)) {
// NSLog("****** Flipping dates ********")
toDate = fromDate.xMins(-1) // In this case, the results are consistently shorter by a minute
fromDate = self
sign = -1
}
return (fromDate,toDate,sign)
}
static func test(months: Int = 0, weeks: Int = 0, days: Int = 0, hrs: Int = 0, mins: Int = 0) {
NSLog("****************** Start Testing of NSDate **************************")
NSLog("Inputs: months:\(months) weeks:\(weeks) days:\(days) hrs: \(hrs) mins: \(mins)")
var today = NSDate()
NSLog("Today is: \(today.timeDayMonthYear)")
var monthsFromToday = today.xMonths(months)
NSLog("** \(months) months from today: \(monthsFromToday.timeDayMonthYear)")
NSLog("monthsFromToday returns: \(monthsFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(monthsFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(monthsFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(monthsFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(monthsFromToday.minsFromToday)");
NSLog("relativeDateString returns: \(monthsFromToday.relativeDateString())")
var weeksFromToday = today.xWeeks(weeks)
NSLog("** \(weeks) weeks from today: \(weeksFromToday.timeDayMonthYear)")
NSLog("weeksFromToday returns: \(weeksFromToday.weeksFromToday)");
NSLog("relativeDateString returns: \(weeksFromToday.relativeDateString(capitalizeFirst:true))")
NSLog("minsFromToday returns: \(weeksFromToday.minsFromToday)");
NSLog("monthsFromToday returns: \(weeksFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(weeksFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(weeksFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(weeksFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(weeksFromToday.minsFromToday)");
var daysFromToday = today.xDays(days)
NSLog("** \(days) days from today: \(daysFromToday.timeDayMonthYear)")
NSLog("daysFromToday returns: \(daysFromToday.daysFromToday)");
NSLog("relativeDateString returns: \(daysFromToday.relativeDateString())")
NSLog("minsFromToday returns: \(daysFromToday.minsFromToday)");
NSLog("monthsFromToday returns: \(daysFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(daysFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(daysFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(daysFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(daysFromToday.minsFromToday)");
var hrsFromToday = today.xHours(hrs)
NSLog("** \(hrs) hours from today: \(hrsFromToday.timeDayMonthYear)")
NSLog("hoursFromToday returns: \(hrsFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(hrsFromToday.minsFromToday)");
NSLog("monthsFromToday returns: \(hrsFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(hrsFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(hrsFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(hrsFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(hrsFromToday.minsFromToday)");
NSLog("relativeDateString returns: \(hrsFromToday.relativeDateString(capitalizeFirst:true))")
var minsFromToday = today.xMins(mins)
NSLog("** \(mins) minutes from today: \(minsFromToday.timeDayMonthYear)")
NSLog("minsFromToday returns: \(minsFromToday.minsFromToday)");
NSLog("monthsFromToday returns: \(minsFromToday.monthsFromToday)");
NSLog("weeksFromToday returns: \(minsFromToday.weeksFromToday)");
NSLog("daysFromToday returns: \(minsFromToday.daysFromToday)");
NSLog("hoursFromToday returns: \(minsFromToday.hoursFromToday)");
NSLog("minsFromToday returns: \(minsFromToday.minsFromToday)");
NSLog("relativeDateString returns: \(minsFromToday.relativeDateString())")
NSLog("__________________ End Testing of NSDate _________________________")
}
}
вам нужно будет сделать другую переменную под названием " Календарь "(объект NSCalendar) и использовать метод init" currentCalendar". После определения объекта календаря вызовите метод в разделе Календарь rangeOfUnit:NSWeekCalendarUnit inUnit: NSMonthCalendarUnit forDate: date. Затем сделайте NSInteger под названием amountOfWeeks равным дальности выше функция возвращает. Длина диапазона функция возвращает номер недели в этом месяц.
не уверен, что вы хотите, но есть weekday, weekdayOrdinal, weekOfMonth и weekOfYear. (week была прекращена.)