Question

我正在使用NSDateComponents()创建日期。

let startDate = NSDateComponents()
startDate.year = 2015
startDate.month = 9
startDate.day = 1
let calendar = NSCalendar.currentCalendar()
let startDateNSDate = calendar.dateFromComponents(startDate)!

...现在我要打印自startDate以来的所有日期，直到今天，NSDate()。我已经尝试使用NSCalendarUnit，但它只输出整个差异，而不是单个日期。

let unit: NSCalendarUnit = [.Year, .Month, .Day, .Hour, .Minute, .Second]
let diff = NSCalendar.currentCalendar().components(unit, fromDate: startDateNSDate, toDate: NSDate(), options: [])

如何在两个Date个对象之间打印所有日期？

编辑2019

与此同时，课程的命名已经改变 - NSDate现在只是Date。 NSDateComponents现在称为DateComponents。 NSCalendar.currentCalendar()现在只是Calendar.current。

Answer 1

只需将日期单位添加到日期，直到达到当前日期（Swift 2代码）：

var date = startDateNSDate // first date
let endDate = NSDate() // last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = NSDateFormatter()
fmt.dateFormat = "dd/MM/yyyy"

// While date <= endDate ...
while date.compare(endDate) != .OrderedDescending {
    print(fmt.stringFromDate(date))
    // Advance by one day:
    date = calendar.dateByAddingUnit(.Day, value: 1, toDate: date, options: [])!
}

更新 Swift 3：

var date = startDate // first date
let endDate = Date() // last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "dd/MM/yyyy"

while date <= endDate {
    print(fmt.string(from: date))
    date = calendar.date(byAdding: .day, value: 1, to: date)!
}

Answer 2

使用扩展程序：

extension Date {
    static func dates(from fromDate: Date, to toDate: Date) -> [Date] {
        var dates: [Date] = []
        var date = fromDate

        while date <= toDate {
            dates.append(date)
            guard let newDate = Calendar.current.date(byAdding: .day, value: 1, to: date) else { break }
            date = newDate
        }
        return dates
    }
}

用法：

let datesBetweenArray = Date.dates(from: Date(), endDate: Date())

Answer 3

同样但更漂亮：

extension Date {

  func allDates(till endDate: Date) -> [Date] {
    var date = self
    var array: [Date] = []
    while date <= endDate {
      array.append(date)
      date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
    }
    return array
  }
}

如何获取未来20天的所有日期：

if let date = Calendar.current.date(byAdding: .day, value: 20, to: Date()) {
  print(Date().allDates(till: date))
}

Answer 4

我正在使用这种方法（Swift 3）：

import Foundation

class Dates {
    static func printDatesBetweenInterval(_ startDate: Date, _ endDate: Date) {
        var startDate = startDate
        let calendar = Calendar.current

        let fmt = DateFormatter()
        fmt.dateFormat = "yyyy-MM-dd"

        while startDate <= endDate {
            print(fmt.string(from: startDate))
            startDate = calendar.date(byAdding: .day, value: 1, to: startDate)!
        }
    }

    static func dateFromString(_ dateString: String) -> Date {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd"

        return dateFormatter.date(from: dateString)!
    }
}

我称之为：

Dates.printDatesBetweenInterval(Dates.dateFromString("2017-01-02"), Dates.dateFromString("2017-01-9"))

输出结果为：

Answer 5

您想要的代码变得像

    let startDate = NSDateComponents()
    startDate.year = 2015
    startDate.month = 9
    startDate.day = 1
    let calendar = NSCalendar.currentCalendar()
    let startDateNSDate = calendar.dateFromComponents(startDate)!


    var offsetComponents:NSDateComponents = NSDateComponents();
    offsetComponents.day = 1
    var nd:NSDate = startDateNSDate;

    println(nd)
    while nd.timeIntervalSince1970 < NSDate().timeIntervalSince1970 {
        nd = calendar.dateByAddingComponents(offsetComponents, toDate: nd, options: nil)!;
            println(nd)


    }

Answer 6

这是打印两个日期之间的所有日期（Swift 4代码）的解决方案

var mydates : [String] = []
let startDate = "2018-03-01"
let endDate   = "2018-03-05"

var dateFrom =  Date() // First date
var dateTo = Date()   // Last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "yyy-MM-dd"
dateFrom = fmt.date(from: startDate)!
dateTo = fmt.date(from: endDate)!


while dateFrom <= dateTo {
    mydates.append(fmt.string(from: dateFrom))
    dateFrom = Calendar.current.date(byAdding: .day, value: 1, to: dateFrom)!

}

print(mydates) // Your Result

输出为：

["2018-03-01", "2018-03-02", "2018-03-03", "2018-03-04", "2018-03-05"]

两个Date对象之间的所有日期（Swift）

6 个答案: