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swift 对日期的处理大全（ 类扩展 Date+Extensi

swift 对日期的处理大全（ 类扩展 Date+Extensi

作者: 在下有双 | 来源:发表于2018-05-28 14:34 被阅读0次

//
// DateHelper.swift
// 自定义tabBar
//
// Created by HR on 2018/5/27.
// Copyright © 2018年 HR. All rights reserved.
//

import Foundation
import UIKit

public extension Date {

// - Returns: 年份
func year() -> Int {
    let calendar = Calendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: self)
    return com.year!
}

// 月份
func month() -> Int {
    let calendar = Calendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: self)
    return com.month!
}


// MARK:日期
func day() -> Int {
    let calendar = Calendar.current
    let com = calendar.dateComponents([.year,.month,.day], from: self)
    return com.day!
    
}

// MARK: 星期几
func weekDay() -> Int {
    let interval = Int(self.timeIntervalSince1970)
    let days = Int(interval/24/60/60)
    let weekday = ((days + 4) % 7 + 7) % 7
    return weekday == 0 ? 7 : weekday
}

// MARK: 当月天数
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: 当月第一天是星期几
func firstWeekDay() -> Int {
    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: 日期的一些比较
// MARK: 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
}

// MARK: 是否是这个月
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
}
}

class DateClass {
// MARK: 当前时间相关
// 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: 今天是星期几
static func currentWeekDay() -> Int {
    let interval = Int(Date().timeIntervalSince1970)
    let days = Int(interval/24/60/60)
    let weekday = ((days + 4)%7 + 7)%7
    return weekday == 0 ? 7 : weekday
}

// MARK: 本月天数
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: 当月第一天是星期几
static func firstWeekDayInCurrentMonth() -> Int {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM"
    let date = dateFormatter.date(from: String(Date().year()) + "-" + String(Date().month()))
    let calendar = Calendar(identifier: Calendar.Identifier.gregorian)
    let comps = (calendar as NSCalendar?)?.components(NSCalendar.Unit.weekday, from: date!)
    var week = comps?.weekday
    if week == 1 {
        week = 8
    }
     return week! - 1
}

   // MARK: 获取指定日期的各种值
//根据年月得到某月天数
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: 根据年月获得某月第一天是星期几
static func getWeekDayInMonth(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转日期字符串
static func dateToDateString(_ date: Date, dateFormat: String) -> String {
    let timeZone = NSTimeZone.local //时区
    let formatter = DateFormatter()
    formatter.timeZone = timeZone
    formatter.dateFormat = dateFormat
    let date = formatter.string(from: date)
    return date
}

// MARK: 日期字符串转date
static func dateStringToDate(_ dataStr: String) -> Date {
    let dateFormatter = DateFormatter()
    dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
    dateFormatter.dateFormat = "yyyy-MM-dd"
    let date = dateFormatter.date(from: dataStr)
    return date!
}

// MARK: 时间字符串转date
static func timeStringToDate(_ dateStr: String) -> Date {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
    let date = dateFormatter.date(from: dateStr)
    return date!
}

// MARK: 计算天数差
static func dateDifferrence(_ dateA:Date, from dateB: Date) -> Double {
    let interval = dateA.timeIntervalSince(dateB)
    return interval/86400
}

// MARK: 比较时间先后
static func compareOneDay(oneDay: Date, withAnotherDay anotherDay:Date) -> Int {
    let 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 早
    if result == ComparisonResult.orderedDescending {
        return 1
        //Date1 晚
    }else if result == ComparisonResult.orderedAscending {
        return 2
        //相等
    }else {
        return 0
    }
}


// MARK: 将时间转化为时间戳
static func stringTotimeStamp(_ stringTime: String) -> Int {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
    dateFormatter.locale = Locale.current
    let date = dateFormatter.date(from: stringTime)
    let dateStamp: TimeInterval = date!.timeIntervalSince1970
    let dateSt: Int = Int(dateStamp)
    return dateSt
}

// MARK: 将时间戳转换为年月日
static func timeStampToString(_ timeStamp: String) -> String {
    let string = NSString(string: timeStamp)
    let timeSta: TimeInterval = string.doubleValue
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy年MM月dd日"
    let date = Date(timeIntervalSince1970: timeSta)
    return dateFormatter.string(from: date)
    
}

// MARK: 将时间戳装换为具体时间
static func timeStampToStringDetail(_ timeStamp: String) -> String {
    let string = NSString(string: timeStamp)
    let timeSta: TimeInterval = string.doubleValue
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy年MM月dd日HH:mm:ss"
    let date = Date(timeIntervalSince1970: timeSta)
    return dateFormatter.string(from: date)
}

// MARK: 将时间戳转化为时分秒
static func timeStampToHHMMSS(_ timeStamp: String) -> String {
    let string = NSString(string: timeStamp)
    let timeSta:TimeInterval = string.doubleValue
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "HH:mm:ss"
    let date = Date(timeIntervalSince1970: timeSta)
    return dateFormatter.string(from: date)
}

// MARK: 获取系统当前时间戳
static func getCurrentStamp() -> Int {
    let date = Date()
    let timeInterval: Int = Int(date.timeIntervalSince1970)
    return timeInterval
}

// MARK: 月份数字转汉字
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: 数字前面补0
static func add0BeforeNumber(_ number: Int) -> String {
    if number >= 10 {
        return String(number)
    }else{
        return "0" + String(number)
    }
}

// MARK: 将时间显示为（几分钟前，几小时前，几天前）
static func compareCurrentTime(str: String) -> String {
    let tiemDate = self.timeStringToDate(str)
    let currentDate = NSDate()
    let tiemInterval = currentDate.timeIntervalSince(tiemDate)
    var temp: Double = 0
    var result: String = ""
    if tiemInterval/60 < 1 {
        result = "刚刚"
    }else if tiemInterval/60 < 60 {
        temp = tiemInterval/60
        result = "\(Int(temp))分钟前"
    }else if tiemInterval/60/60 < 24 {
        temp = tiemInterval/60/60
        result = "\(Int(temp))小时前"
    }else if tiemInterval/60/60/24 < 30 {
        temp = tiemInterval/60/60/24
        result = "\(Int(temp))天前"
    }else if tiemInterval/(60 * 60 * 24 * 30) < 12 {
        temp = tiemInterval/(60 * 60 * 24 * 30)
        result = "\(Int(temp))个月前"
    }else {
        temp = tiemInterval/(12 * 30 * 24 * 60 * 60)
        result = "\(Int(temp))年前"
    }
    return result
}

}

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