swift 對日期的處理大全（ 類擴充套件 Date+Extension 和 公共類 DateClass）
阿新 • • 發佈：2018-12-22
類擴充套件 Date+Extension
import UIKit extension Date { //MARK: - 獲取日期各種值 //MARK: 年 func year() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: self) return com.year! } //MARK: 月 func month() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: self) return com.month! } //MARK: 日 func day() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: self) return com.day! } //MARK: 星期幾 func weekDay()->Int{ let interval = Int(self.timeIntervalSince1970) let days = Int(interval/86400) // 24*60*60 let weekday = ((days + 4)%7+7)%7 return weekday == 0 ? 7 : weekday } //MARK: 當月天數 func countOfDaysInMonth() ->Int { let calendar = Calendar(identifier:Calendar.Identifier.gregorian) let range = (calendar as NSCalendar?)?.range(of: NSCalendar.Unit.day, in: NSCalendar.Unit.month, for: self) return (range?.length)! } //MARK: 當月第一天是星期幾 func firstWeekDay() ->Int { //1.Sun. 2.Mon. 3.Thes. 4.Wed. 5.Thur. 6.Fri. 7.Sat. let calendar = Calendar(identifier:Calendar.Identifier.gregorian) let firstWeekDay = (calendar as NSCalendar?)?.ordinality(of: NSCalendar.Unit.weekday, in: NSCalendar.Unit.weekOfMonth, for: self) return firstWeekDay! - 1 } //MARK: - 日期的一些比較 //是否是今天 func isToday()->Bool { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: self) let comNow = calendar.dateComponents([.year,.month,.day], from: Date()) return com.year == comNow.year && com.month == comNow.month && com.day == comNow.day } //是否是這個月 func isThisMonth()->Bool { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: self) let comNow = calendar.dateComponents([.year,.month,.day], from: Date()) return com.year == comNow.year && com.month == comNow.month } }
DateClass
import UIKit class DateClass { //MARK: - 當前時間相關 //MARK: 今年 static func currentYear() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: Date()) return com.year! } //MARK: 今月 static func currentMonth() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: Date()) return com.month! } //MARK: 今日 static func currentDay() ->Int { let calendar = NSCalendar.current let com = calendar.dateComponents([.year,.month,.day], from: Date()) return com.day! } //MARK: 今天星期幾 static func currentWeekDay()->Int{ let interval = Int(Date().timeIntervalSince1970) let days = Int(interval/86400) // 24*60*60 let weekday = ((days + 4)%7+7)%7 return weekday == 0 ? 7 : weekday } //MARK: 本月天數 static func countOfDaysInCurrentMonth() ->Int { let calendar = Calendar(identifier:Calendar.Identifier.gregorian) let range = (calendar as NSCalendar?)?.range(of: NSCalendar.Unit.day, in: NSCalendar.Unit.month, for: Date()) return (range?.length)! } //MARK: 當月第一天是星期幾 static func firstWeekDayInCurrentMonth() ->Int { //星期和數字一一對應 星期日：7 let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM" let date = dateFormatter.date(from: String(Date().year())+"-"+String(Date().month())) let calender = Calendar(identifier:Calendar.Identifier.gregorian) let comps = (calender as NSCalendar?)?.components(NSCalendar.Unit.weekday, from: date!) var week = comps?.weekday if week == 1 { week = 8 } return week! - 1 } //MARK: - 獲取指定日期各種值 //根據年月得到某月天數 static func getCountOfDaysInMonth(year:Int,month:Int) ->Int{ let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM" let date = dateFormatter.date(from: String(year)+"-"+String(month)) let calendar = Calendar(identifier:Calendar.Identifier.gregorian) let range = (calendar as NSCalendar?)?.range(of: NSCalendar.Unit.day, in: NSCalendar.Unit.month, for: date!) return (range?.length)! } //MARK: 根據年月得到某月第一天是周幾 static func getfirstWeekDayInMonth(year:Int,month:Int) -> Int{ let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM" let date = dateFormatter.date(from: String(year)+"-"+String(month)) let calendar = Calendar(identifier:Calendar.Identifier.gregorian) let comps = (calendar as NSCalendar?)?.components(NSCalendar.Unit.weekday, from: date!) let week = comps?.weekday return week! - 1 } //MARK: date轉日期字串 static func dateToDateString(_ date:Date, dateFormat:String) -> String { let timeZone = NSTimeZone.local let formatter = DateFormatter() formatter.timeZone = timeZone formatter.dateFormat = dateFormat let date = formatter.string(from: date) return date } //MARK: 日期字串轉date static func dateStringToDate(_ dateStr:String) ->Date { let dateFormatter = DateFormatter() dateFormatter.timeZone = TimeZone(abbreviation: "UTC") dateFormatter.dateFormat = "yyyy-MM-dd" let date = dateFormatter.date(from: dateStr) return date! } //MARK: 時間字串轉date static func timeStringToDate(_ dateStr:String) ->Date { let dateFormatter = DateFormatter() // dateFormatter.timeZone = TimeZone(abbreviation: "UTC") dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss" let date = dateFormatter.date(from: dateStr) return date! } //MARK: 計算天數差 static func dateDifference(_ dateA:Date, from dateB:Date) -> Double { let interval = dateA.timeIntervalSince(dateB) return interval/86400 } //MARK: 比較時間先後 static func compareOneDay(oneDay:Date, withAnotherDay anotherDay:Date) -> Int { let dateFormatter:DateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd" let oneDayStr:String = dateFormatter.string(from: oneDay) let anotherDayStr:String = dateFormatter.string(from: anotherDay) let dateA = dateFormatter.date(from: oneDayStr) let dateB = dateFormatter.date(from: anotherDayStr) let result:ComparisonResult = (dateA?.compare(dateB!))! //Date1 is in the future if(result == ComparisonResult.orderedDescending ) { return 1 } //Date1 is in the past else if(result == ComparisonResult.orderedAscending) { return 2 } //Both dates are the same else { return 0 } } //MARK: 時間與時間戳之間的轉化 //將時間轉換為時間戳 static func stringToTimeStamp(_ stringTime:String)->Int { let dfmatter = DateFormatter() dfmatter.dateFormat = "yyyy-MM-dd HH:mm:ss" dfmatter.locale = Locale.current let date = dfmatter.date(from: stringTime) let dateStamp:TimeInterval = date!.timeIntervalSince1970 let dateSt:Int = Int(dateStamp) return dateSt } //將時間戳轉換為年月日 static func timeStampToString(_ timeStamp:String)->String { let string = NSString(string: timeStamp) let timeSta:TimeInterval = string.doubleValue let dfmatter = DateFormatter() dfmatter.dateFormat="yyyy年MM月dd日" let date = Date(timeIntervalSince1970: timeSta) return dfmatter.string(from: date) } //將時間戳轉換為具體時間 static func timeStampToStringDetail(_ timeStamp:String)->String { let string = NSString(string: timeStamp) let timeSta:TimeInterval = string.doubleValue let dfmatter = DateFormatter() dfmatter.dateFormat="yyyy年MM月dd日HH:mm:ss" let date = Date(timeIntervalSince1970: timeSta) return dfmatter.string(from: date) } //將時間戳轉換為時分秒 static func timeStampToHHMMSS(_ timeStamp:String)->String { let string = NSString(string: timeStamp) let timeSta:TimeInterval = string.doubleValue let dfmatter = DateFormatter() dfmatter.dateFormat="HH:mm:ss" let date = Date(timeIntervalSince1970: timeSta) return dfmatter.string(from: date) } //獲取系統的當前時間戳 static func getStamp()->Int{ //獲取當前時間戳 let date = Date() let timeInterval:Int = Int(date.timeIntervalSince1970) return timeInterval } //月份數字轉漢字 static func numberToChina(monthNum:Int) -> String { let ChinaArray = ["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"] let ChinaStr:String = ChinaArray[monthNum - 1] return ChinaStr } //MARK: 數字前補0 static func add0BeforeNumber(_ number:Int) -> String { if number >= 10 { return String(number) }else{ return "0" + String(number) } } //MARK: 將時間顯示為（幾分鐘前，幾小時前，幾天前） static func compareCurrentTime(str:String) -> String { let timeDate = self.timeStringToDate(str) let currentDate = NSDate() let timeInterval = currentDate.timeIntervalSince(timeDate) var temp:Double = 0 var result:String = "" if timeInterval/60 < 1 { result = "剛剛" }else if (timeInterval/60) < 60{ temp = timeInterval/60 result = "\(Int(temp))分鐘前" }else if timeInterval/60/60 < 24 { temp = timeInterval/60/60 result = "\(Int(temp))小時前" }else if timeInterval/(24 * 60 * 60) < 30 { temp = timeInterval / (24 * 60 * 60) result = "\(Int(temp))天前" }else if timeInterval/(30 * 24 * 60 * 60) < 12 { temp = timeInterval/(30 * 24 * 60 * 60) result = "\(Int(temp))個月前" }else{ temp = timeInterval/(12 * 30 * 24 * 60 * 60) result = "\(Int(temp))年前" } return result } }
swift 語法
let date = Date()
let zone = NSTimeZone.local
let interval:NSInteger = zone.secondsFromGMT(for: date)
let now = date.addingTimeInterval(TimeInterval(interval))
print(date,now)