Swift-Date Extension
2018-05-15 本文已影响0人
长风浮云
/// Day name format.
///
/// - threeLetters: 3 letter day abbreviation of day name.
/// - oneLetter: 1 letter day abbreviation of day name.
/// - full: Full day name.
public enum DayNameStyle {
case threeLetters
case oneLetter
case full
}
/// Month name format.
///
/// - threeLetters: 3 letter month abbreviation of month name.
/// - oneLetter: 1 letter month abbreviation of month name.
/// - full: Full month name.
public enum MonthNameStyle {
case threeLetters
case oneLetter
case full
}
属性
当前calendar
extension Date {
public var calendar: Calendar {
return Calendar.current
}
}
时代
extension Date {
///
/// Date().era -> 1
///
public var era: Int {
return Calendar.current.component(.era, from: self)
}
}
季度
extension Date {
///
/// Date().quarter -> 3 // date in third quarter of the year.
///
public var quarter: Int {
let month = Double(Calendar.current.component(.month, from: self))
let numberOfMonths = Double(Calendar.current.monthSymbols.count)
let numberOfMonthsInQuarter = numberOfMonths / 4
return Int(ceil(month/numberOfMonthsInQuarter))
}
}
一年中的第几周
extension Date {
///
/// Date().weekOfYear -> 2 // second week in the year.
///
public var weekOfYear: Int {
return Calendar.current.component(.weekOfYear, from: self)
}
}
一月中的第几周
extension Date {
///
/// Date().weekOfMonth -> 3 // date is in third week of the month.
///
public var weekOfMonth: Int {
return Calendar.current.component(.weekOfMonth, from: self)
}
}
年
extension Date {
///
/// Date().year -> 2017
///
/// var someDate = Date()
/// someDate.year = 2000 // sets someDate's year to 2000
///
public var year: Int {
get {
return Calendar.current.component(.year, from: self)
}
set {
guard newValue > 0 else { return }
let currentYear = Calendar.current.component(.year, from: self)
let yearsToAdd = newValue - currentYear
if let date = Calendar.current.date(byAdding: .year, value: yearsToAdd, to: self) {
self = date
}
}
}
}
月
extension Date {
///
/// Date().month -> 1
///
/// var someDate = Date()
/// someDate.month = 10 // sets someDate's month to 10.
///
public var month: Int {
get {
return Calendar.current.component(.month, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .month, in: .year, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentMonth = Calendar.current.component(.month, from: self)
let monthsToAdd = newValue - currentMonth
if let date = Calendar.current.date(byAdding: .month, value: monthsToAdd, to: self) {
self = date
}
}
}
}
天
extension Date {
///
/// Date().day -> 12
///
/// var someDate = Date()
/// someDate.day = 1 // sets someDate's day of month to 1.
///
public var day: Int {
get {
return Calendar.current.component(.day, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .day, in: .month, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentDay = Calendar.current.component(.day, from: self)
let daysToAdd = newValue - currentDay
if let date = Calendar.current.date(byAdding: .day, value: daysToAdd, to: self) {
self = date
}
}
}
}
星期几
extension Date {
///
/// Date().weekday -> 5 // fifth day in the current week.
///
public var weekday: Int {
return Calendar.current.component(.weekday, from: self)
}
}
当前时间的小时
extension Date {
///
/// Date().hour -> 17 // 5 pm
///
/// var someDate = Date()
/// someDate.hour = 13 // sets someDate's hour to 1 pm.
///
public var hour: Int {
get {
return Calendar.current.component(.hour, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .hour, in: .day, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentHour = Calendar.current.component(.hour, from: self)
let hoursToAdd = newValue - currentHour
if let date = Calendar.current.date(byAdding: .hour, value: hoursToAdd, to: self) {
self = date
}
}
}
}
当前时间的分钟
extension Date {
///
/// Date().minute -> 39
///
/// var someDate = Date()
/// someDate.minute = 10 // sets someDate's minutes to 10.
///
public var minute: Int {
get {
return Calendar.current.component(.minute, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .minute, in: .hour, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentMinutes = Calendar.current.component(.minute, from: self)
let minutesToAdd = newValue - currentMinutes
if let date = Calendar.current.date(byAdding: .minute, value: minutesToAdd, to: self) {
self = date
}
}
}
}
当前时间的秒
extension Date {
///
/// Date().second -> 55
///
/// var someDate = Date()
/// someDate.second = 15 // sets someDate's seconds to 15.
///
public var second: Int {
get {
return Calendar.current.component(.second, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .second, in: .minute, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentSeconds = Calendar.current.component(.second, from: self)
let secondsToAdd = newValue - currentSeconds
if let date = Calendar.current.date(byAdding: .second, value: secondsToAdd, to: self) {
self = date
}
}
}
}
纳秒
extension Date {
///
/// Date().nanosecond -> 981379985
///
/// var someDate = Date()
/// someDate.nanosecond = 981379985 // sets someDate's seconds to 981379985.
///
public var nanosecond: Int {
get {
return Calendar.current.component(.nanosecond, from: self)
}
set {
let allowedRange = Calendar.current.range(of: .nanosecond, in: .second, for: self)!
guard allowedRange.contains(newValue) else { return }
let currentNanoseconds = Calendar.current.component(.nanosecond, from: self)
let nanosecondsToAdd = newValue - currentNanoseconds
if let date = Calendar.current.date(byAdding: .nanosecond, value: nanosecondsToAdd, to: self) {
self = date
}
}
}
}
毫秒
extension Date {
///
/// Date().millisecond -> 68
///
/// var someDate = Date()
/// someDate.millisecond = 68 // sets someDate's nanosecond to 68000000.
///
public var millisecond: Int {
get {
return Calendar.current.component(.nanosecond, from: self) / 1000000
}
set {
let nanoSeconds = newValue * 1000000
let allowedRange = Calendar.current.range(of: .nanosecond, in: .second, for: self)!
guard allowedRange.contains(nanoSeconds) else { return }
if let date = Calendar.current.date(bySetting: .nanosecond, value: nanoSeconds, of: self) {
self = date
}
}
}
}
是否是将来时间
extension Date {
///
/// Date(timeInterval: 100, since: Date()).isInFuture -> true
///
public var isInFuture: Bool {
return self > Date()
}
}
是否是过去时间
extension Date {
///
/// Date(timeInterval: -100, since: Date()).isInPast -> true
///
public var isInPast: Bool {
return self < Date()
}
}
是否在今天
extension Date {
///
/// Date().isInToday -> true
///
public var isInToday: Bool {
return Calendar.current.isDateInToday(self)
}
}
是否是在昨天
extension Date {
///
/// Date().isInYesterday -> false
///
public var isInYesterday: Bool {
return Calendar.current.isDateInYesterday(self)
}
}
是否是在明天
extension Date {
///
/// Date().isInTomorrow -> false
///
public var isInTomorrow: Bool {
return Calendar.current.isDateInTomorrow(self)
}
}
是否在周末期间
extension Date {
public var isInWeekend: Bool {
return Calendar.current.isDateInWeekend(self)
}
}
是否在工作日内
extension Date {
public var isWorkday: Bool {
return !Calendar.current.isDateInWeekend(self)
}
}
是否在当前周内
extension Date {
public var isInCurrentWeek: Bool {
return Calendar.current.isDate(self, equalTo: Date(), toGranularity: .weekOfYear)
}
}
是否在当前月内
extension Date {
public var isInCurrentMonth: Bool {
return Calendar.current.isDate(self, equalTo: Date(), toGranularity: .month)
}
}
是否在当前年内
extension Date {
public var isInCurrentYear: Bool {
return Calendar.current.isDate(self, equalTo: Date(), toGranularity: .year)
}
}
ISO8601格式
extension Date {
/// ISO8601 string of format (yyyy-MM-dd'T'HH:mm:ss.SSS) from date.
///
/// Date().iso8601String -> "2017-01-12T14:51:29.574Z"
///
public var iso8601String: String {
// https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.timeZone = TimeZone(abbreviation: "GMT")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS"
return dateFormatter.string(from: self).appending("Z")
}
}
最近的5整数倍分钟时间
extension Date {
///
/// var date = Date() // "5:54 PM"
/// date.minute = 32 // "5:32 PM"
/// date.nearestFiveMinutes // "5:30 PM"
///
/// date.minute = 44 // "5:44 PM"
/// date.nearestFiveMinutes // "5:45 PM"
///
public var nearestFiveMinutes: Date {
var components = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second, .nanosecond], from: self)
let min = components.minute!
components.minute! = min % 5 < 3 ? min - min % 5 : min + 5 - (min % 5)
components.second = 0
components.nanosecond = 0
return Calendar.current.date(from: components)!
}
}
最近的10整数倍分钟时间
extension Date {
///
/// var date = Date() // "5:57 PM"
/// date.minute = 34 // "5:34 PM"
/// date.nearestTenMinutes // "5:30 PM"
///
/// date.minute = 48 // "5:48 PM"
/// date.nearestTenMinutes // "5:50 PM"
///
public var nearestTenMinutes: Date {
var components = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second, .nanosecond], from: self)
let min = components.minute!
components.minute? = min % 10 < 6 ? min - min % 10 : min + 10 - (min % 10)
components.second = 0
components.nanosecond = 0
return Calendar.current.date(from: components)!
}
}
最近刻度时间
extension Date {
///
/// var date = Date() // "5:57 PM"
/// date.minute = 34 // "5:34 PM"
/// date.nearestQuarterHour // "5:30 PM"
///
/// date.minute = 40 // "5:40 PM"
/// date.nearestQuarterHour // "5:45 PM"
///
public var nearestQuarterHour: Date {
var components = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second, .nanosecond], from: self)
let min = components.minute!
components.minute! = min % 15 < 8 ? min - min % 15 : min + 15 - (min % 15)
components.second = 0
components.nanosecond = 0
return Calendar.current.date(from: components)!
}
}
最近半小时时间
extension Date {
///
/// var date = Date() // "6:07 PM"
/// date.minute = 41 // "6:41 PM"
/// date.nearestHalfHour // "6:30 PM"
///
/// date.minute = 51 // "6:51 PM"
/// date.nearestHalfHour // "7:00 PM"
///
public var nearestHalfHour: Date {
var components = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second, .nanosecond], from: self)
let min = components.minute!
components.minute! = min % 30 < 15 ? min - min % 30 : min + 30 - (min % 30)
components.second = 0
components.nanosecond = 0
return Calendar.current.date(from: components)!
}
}
最近小时时间
extension Date {
///
/// var date = Date() // "6:17 PM"
/// date.nearestHour // "6:00 PM"
///
/// date.minute = 36 // "6:36 PM"
/// date.nearestHour // "7:00 PM"
///
public var nearestHour: Date {
let min = Calendar.current.component(.minute, from: self)
let components: Set<Calendar.Component> = [.year, .month, .day, .hour]
let date = Calendar.current.date(from: Calendar.current.dateComponents(components, from: self))!
if min < 30 {
return date
}
return Calendar.current.date(byAdding: .hour, value: 1, to: date)!
}
}
时区
extension Date {
///
/// Date().timeZone -> Europe/Istanbul (current)
///
public var timeZone: TimeZone {
return Calendar.current.timeZone
}
}
unix时间戳
extension Date {
///
/// Date().unixTimestamp -> 1484233862.826291
///
public var unixTimestamp: Double {
return timeIntervalSince1970
}
}
方法
根据Calendar.Component更改日期
extension Date {
///
/// let date = Date() // "Jan 12, 2017, 7:07 PM"
/// let date2 = date.adding(.minute, value: -10) // "Jan 12, 2017, 6:57 PM"
/// let date3 = date.adding(.day, value: 4) // "Jan 16, 2017, 7:07 PM"
/// let date4 = date.adding(.month, value: 2) // "Mar 12, 2017, 7:07 PM"
/// let date5 = date.adding(.year, value: 13) // "Jan 12, 2030, 7:07 PM"
///
/// - Parameters:
/// - component: component type.
/// - value: multiples of components to add.
/// - Returns: original date + multiples of component added.
public func adding(_ component: Calendar.Component, value: Int) -> Date {
return Calendar.current.date(byAdding: component, value: value, to: self)!
}
}
根据Calendar.Component更改日期
extension Date {
///
/// var date = Date() // "Jan 12, 2017, 7:07 PM"
/// date.add(.minute, value: -10) // "Jan 12, 2017, 6:57 PM"
/// date.add(.day, value: 4) // "Jan 16, 2017, 7:07 PM"
/// date.add(.month, value: 2) // "Mar 12, 2017, 7:07 PM"
/// date.add(.year, value: 13) // "Jan 12, 2030, 7:07 PM"
///
/// - Parameters:
/// - component: component type.
/// - value: multiples of compnenet to add.
public mutating func add(_ component: Calendar.Component, value: Int) {
if let date = Calendar.current.date(byAdding: component, value: value, to: self) {
self = date
}
}
}
改变Calendar.Component的值
extension Date {
///
/// let date = Date() // "Jan 12, 2017, 7:07 PM"
/// let date2 = date.changing(.minute, value: 10) // "Jan 12, 2017, 6:10 PM"
/// let date3 = date.changing(.day, value: 4) // "Jan 4, 2017, 7:07 PM"
/// let date4 = date.changing(.month, value: 2) // "Feb 12, 2017, 7:07 PM"
/// let date5 = date.changing(.year, value: 2000) // "Jan 12, 2000, 7:07 PM"
///
/// - Parameters:
/// - component: component type.
/// - value: new value of compnenet to change.
/// - Returns: original date after changing given component to given value.
public func changing(_ component: Calendar.Component, value: Int) -> Date? {
switch component {
case .nanosecond:
let allowedRange = Calendar.current.range(of: .nanosecond, in: .second, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentNanoseconds = Calendar.current.component(.nanosecond, from: self)
let nanosecondsToAdd = value - currentNanoseconds
return Calendar.current.date(byAdding: .nanosecond, value: nanosecondsToAdd, to: self)
case .second:
let allowedRange = Calendar.current.range(of: .second, in: .minute, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentSeconds = Calendar.current.component(.second, from: self)
let secondsToAdd = value - currentSeconds
return Calendar.current.date(byAdding: .second, value: secondsToAdd, to: self)
case .minute:
let allowedRange = Calendar.current.range(of: .minute, in: .hour, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentMinutes = Calendar.current.component(.minute, from: self)
let minutesToAdd = value - currentMinutes
return Calendar.current.date(byAdding: .minute, value: minutesToAdd, to: self)
case .hour:
let allowedRange = Calendar.current.range(of: .hour, in: .day, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentHour = Calendar.current.component(.hour, from: self)
let hoursToAdd = value - currentHour
return Calendar.current.date(byAdding: .hour, value: hoursToAdd, to: self)
case .day:
let allowedRange = Calendar.current.range(of: .day, in: .month, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentDay = Calendar.current.component(.day, from: self)
let daysToAdd = value - currentDay
return Calendar.current.date(byAdding: .day, value: daysToAdd, to: self)
case .month:
let allowedRange = Calendar.current.range(of: .month, in: .year, for: self)!
guard allowedRange.contains(value) else { return nil }
let currentMonth = Calendar.current.component(.month, from: self)
let monthsToAdd = value - currentMonth
return Calendar.current.date(byAdding: .month, value: monthsToAdd, to: self)
case .year:
guard value > 0 else { return nil }
let currentYear = Calendar.current.component(.year, from: self)
let yearsToAdd = value - currentYear
return Calendar.current.date(byAdding: .year, value: yearsToAdd, to: self)
default:
return Calendar.current.date(bySetting: component, value: value, of: self)
}
}
}
根据Calendar.Component获取最初时间
extension Date {
///
/// let date = Date() // "Jan 12, 2017, 7:14 PM"
/// let date2 = date.beginning(of: .hour) // "Jan 12, 2017, 7:00 PM"
/// let date3 = date.beginning(of: .month) // "Jan 1, 2017, 12:00 AM"
/// let date4 = date.beginning(of: .year) // "Jan 1, 2017, 12:00 AM"
///
/// - Parameter component: calendar component to get date at the beginning of.
/// - Returns: date at the beginning of calendar component (if applicable).
public func beginning(of component: Calendar.Component) -> Date? {
if component == .day {
return Calendar.current.startOfDay(for: self)
}
var components: Set<Calendar.Component> {
switch component {
case .second:
return [.year, .month, .day, .hour, .minute, .second]
case .minute:
return [.year, .month, .day, .hour, .minute]
case .hour:
return [.year, .month, .day, .hour]
case .weekOfYear, .weekOfMonth:
return [.yearForWeekOfYear, .weekOfYear]
case .month:
return [.year, .month]
case .year:
return [.year]
default:
return []
}
}
guard !components.isEmpty else { return nil }
return Calendar.current.date(from: Calendar.current.dateComponents(components, from: self))
}
}
根据Calendar.Component获取最末时间
extension Date {
///
/// let date = Date() // "Jan 12, 2017, 7:27 PM"
/// let date2 = date.end(of: .day) // "Jan 12, 2017, 11:59 PM"
/// let date3 = date.end(of: .month) // "Jan 31, 2017, 11:59 PM"
/// let date4 = date.end(of: .year) // "Dec 31, 2017, 11:59 PM"
///
/// - Parameter component: calendar component to get date at the end of.
/// - Returns: date at the end of calendar component (if applicable).
public func end(of component: Calendar.Component) -> Date? {
switch component {
case .second:
var date = adding(.second, value: 1)
date = Calendar.current.date(from:
Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date))!
date.add(.second, value: -1)
return date
case .minute:
var date = adding(.minute, value: 1)
let after = Calendar.current.date(from:
Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: date))!
date = after.adding(.second, value: -1)
return date
case .hour:
var date = adding(.hour, value: 1)
let after = Calendar.current.date(from:
Calendar.current.dateComponents([.year, .month, .day, .hour], from: date))!
date = after.adding(.second, value: -1)
return date
case .day:
var date = adding(.day, value: 1)
date = Calendar.current.startOfDay(for: date)
date.add(.second, value: -1)
return date
case .weekOfYear, .weekOfMonth:
var date = self
let beginningOfWeek = Calendar.current.date(from:
Calendar.current.dateComponents([.yearForWeekOfYear, .weekOfYear], from: date))!
date = beginningOfWeek.adding(.day, value: 7).adding(.second, value: -1)
return date
case .month:
var date = adding(.month, value: 1)
let after = Calendar.current.date(from:
Calendar.current.dateComponents([.year, .month], from: date))!
date = after.adding(.second, value: -1)
return date
case .year:
var date = adding(.year, value: 1)
let after = Calendar.current.date(from:
Calendar.current.dateComponents([.year], from: date))!
date = after.adding(.second, value: -1)
return date
default:
return nil
}
}
}
判断某个时间是否在给定的Calendar.Component内
extension Date {
///
/// Date().isInCurrent(.day) -> true
/// Date().isInCurrent(.year) -> true
///
/// - Parameter component: calendar component to check.
/// - Returns: true if date is in current given calendar component.
public func isInCurrent(_ component: Calendar.Component) -> Bool {
return Calendar.current.isDate(self, equalTo: Date(), toGranularity: component)
}
}
日期按照给定的格式转化为日期字符串
extension Date {
///
/// Date().string(withFormat: "dd/MM/yyyy") -> "1/12/17"
/// Date().string(withFormat: "HH:mm") -> "23:50"
/// Date().string(withFormat: "dd/MM/yyyy HH:mm") -> "1/12/17 23:50"
///
/// - Parameter format: Date format (default is "dd/MM/yyyy").
/// - Returns: date string.
public func string(withFormat format: String = "dd/MM/yyyy HH:mm") -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = format
return dateFormatter.string(from: self)
}
}
根据格式样式转化为日期字符串
extension Date {
///
/// Date().dateString(ofStyle: .short) -> "1/12/17"
/// Date().dateString(ofStyle: .medium) -> "Jan 12, 2017"
/// Date().dateString(ofStyle: .long) -> "January 12, 2017"
/// Date().dateString(ofStyle: .full) -> "Thursday, January 12, 2017"
///
/// - Parameter style: DateFormatter style (default is .medium).
/// - Returns: date string.
public func dateString(ofStyle style: DateFormatter.Style = .medium) -> String {
let dateFormatter = DateFormatter()
dateFormatter.timeStyle = .none
dateFormatter.dateStyle = style
return dateFormatter.string(from: self)
}
}
根据格式样式转化为日期时间字符串
extension Date {
///
/// Date().dateTimeString(ofStyle: .short) -> "1/12/17, 7:32 PM"
/// Date().dateTimeString(ofStyle: .medium) -> "Jan 12, 2017, 7:32:00 PM"
/// Date().dateTimeString(ofStyle: .long) -> "January 12, 2017 at 7:32:00 PM GMT+3"
/// Date().dateTimeString(ofStyle: .full) -> "Thursday, January 12, 2017 at 7:32:00 PM GMT+03:00"
///
/// - Parameter style: DateFormatter style (default is .medium).
/// - Returns: date and time string.
public func dateTimeString(ofStyle style: DateFormatter.Style = .medium) -> String {
let dateFormatter = DateFormatter()
dateFormatter.timeStyle = style
dateFormatter.dateStyle = style
return dateFormatter.string(from: self)
}
}
根据格式样式转化为时间字符串
extension Date {
///
/// Date().timeString(ofStyle: .short) -> "7:37 PM"
/// Date().timeString(ofStyle: .medium) -> "7:37:02 PM"
/// Date().timeString(ofStyle: .long) -> "7:37:02 PM GMT+3"
/// Date().timeString(ofStyle: .full) -> "7:37:02 PM GMT+03:00"
///
/// - Parameter style: DateFormatter style (default is .medium).
/// - Returns: time string.
public func timeString(ofStyle style: DateFormatter.Style = .medium) -> String {
let dateFormatter = DateFormatter()
dateFormatter.timeStyle = style
dateFormatter.dateStyle = .none
return dateFormatter.string(from: self)
}
}
获取天(周名称)
extension Date {
///
/// Date().dayName(ofStyle: .oneLetter) -> "T"
/// Date().dayName(ofStyle: .threeLetters) -> "Thu"
/// Date().dayName(ofStyle: .full) -> "Thursday"
///
/// - Parameter Style: style of day name (default is DayNameStyle.full).
/// - Returns: day name string (example: W, Wed, Wednesday).
public func dayName(ofStyle style: DayNameStyle = .full) -> String {
// http://www.codingexplorer.com/swiftly-getting-human-readable-date-nsdateformatter/
let dateFormatter = DateFormatter()
var format: String {
switch style {
case .oneLetter:
return "EEEEE"
case .threeLetters:
return "EEE"
case .full:
return "EEEE"
}
}
dateFormatter.setLocalizedDateFormatFromTemplate(format)
return dateFormatter.string(from: self)
}
}
获取月
extension Date {
///
/// Date().monthName(ofStyle: .oneLetter) -> "J"
/// Date().monthName(ofStyle: .threeLetters) -> "Jan"
/// Date().monthName(ofStyle: .full) -> "January"
///
/// - Parameter Style: style of month name (default is MonthNameStyle.full).
/// - Returns: month name string (example: D, Dec, December).
public func monthName(ofStyle style: MonthNameStyle = .full) -> String {
// http://www.codingexplorer.com/swiftly-getting-human-readable-date-nsdateformatter/
let dateFormatter = DateFormatter()
var format: String {
switch style {
case .oneLetter:
return "MMMMM"
case .threeLetters:
return "MMM"
case .full:
return "MMMM"
}
}
dateFormatter.setLocalizedDateFormatFromTemplate(format)
return dateFormatter.string(from: self)
}
}
获取两个时间的秒数
extension Date {
public func secondsSince(_ date: Date) -> Double {
return timeIntervalSince(date)
}
}
获取两个时间的分钟数
extension Date {
public func minutesSince(_ date: Date) -> Double {
return timeIntervalSince(date)/60
}
}
获取两个时间的小时数
extension Date {
public func hoursSince(_ date: Date) -> Double {
return timeIntervalSince(date)/3600
}
}
获取两个时间的天数
extension Date {
public func daysSince(_ date: Date) -> Double {
return timeIntervalSince(date)/(3600*24)
}
}
检查某个时间是否在某个时间段内
extension Date {
public func isBetween(_ startDate: Date, _ endDate: Date, includeBounds: Bool = false) -> Bool {
if includeBounds {
return startDate.compare(self).rawValue * compare(endDate).rawValue >= 0
}
return startDate.compare(self).rawValue * compare(endDate).rawValue > 0
}
}
随机日期
extension Date {
public static func random(from fromDate: Date = Date.distantPast, upTo toDate: Date = Date.distantFuture) -> Date {
guard fromDate != toDate else {
return fromDate
}
let diff = llabs(Int64(toDate.timeIntervalSinceReferenceDate - fromDate.timeIntervalSinceReferenceDate))
var randomValue: Int64 = 0
arc4random_buf(&randomValue, MemoryLayout<Int64>.size)
randomValue = llabs(randomValue%diff)
let startReferenceDate = toDate > fromDate ? fromDate : toDate
return startReferenceDate.addingTimeInterval(TimeInterval(randomValue))
}
}
初始化
extension Date {
///
/// let date = Date(year: 2010, month: 1, day: 12) // "Jan 12, 2010, 7:45 PM"
///
/// - Parameters:
/// - calendar: Calendar (default is current).
/// - timeZone: TimeZone (default is current).
/// - era: Era (default is current era).
/// - year: Year (default is current year).
/// - month: Month (default is current month).
/// - day: Day (default is today).
/// - hour: Hour (default is current hour).
/// - minute: Minute (default is current minute).
/// - second: Second (default is current second).
/// - nanosecond: Nanosecond (default is current nanosecond).
public init?(
calendar: Calendar? = Calendar.current,
timeZone: TimeZone? = TimeZone.current,
era: Int? = Date().era,
year: Int? = Date().year,
month: Int? = Date().month,
day: Int? = Date().day,
hour: Int? = Date().hour,
minute: Int? = Date().minute,
second: Int? = Date().second,
nanosecond: Int? = Date().nanosecond) {
var components = DateComponents()
components.calendar = calendar
components.timeZone = timeZone
components.era = era
components.year = year
components.month = month
components.day = day
components.hour = hour
components.minute = minute
components.second = second
components.nanosecond = nanosecond
if let date = calendar?.date(from: components) {
self = date
} else {
return nil
}
}
}
根据ISO8601字符串创建日期
extension Date {
///
/// let date = Date(iso8601String: "2017-01-12T16:48:00.959Z") // "Jan 12, 2017, 7:48 PM"
///
/// - Parameter iso8601String: ISO8601 string of format (yyyy-MM-dd'T'HH:mm:ss.SSSZ).
public init?(iso8601String: String) {
// https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
if let date = dateFormatter.date(from: iso8601String) {
self = date
} else {
return nil
}
}
}
根据时间戳创建日期
extension Date {
///
/// let date = Date(unixTimestamp: 1484239783.922743) // "Jan 12, 2017, 7:49 PM"
///
/// - Parameter unixTimestamp: UNIX timestamp.
public init(unixTimestamp: Double) {
self.init(timeIntervalSince1970: unixTimestamp)
}
}
根据整数创建日期
extension Date {
///
/// let date = Date(integerLiteral: 2017_12_25) // "2017-12-25 00:00:00 +0000"
/// - Parameter value: Int value, e.g. 20171225, or 2017_12_25 etc.
public init?(integerLiteral value: Int) {
let formatter = DateFormatter()
formatter.dateFormat = "yyyyMMdd"
guard let date = formatter.date(from: String(value)) else { return nil }
self = date
}
}
资源来自网络和日常整理，持续更新
