两个 Date 对象之间的所有日期 (Swift)

发布于09月12日

我正在用NSDateComponents()创建一个日期.

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

... 现在我想打印从startDate年到今天NSDate()年的所有日期.我已经试过玩NSCalendarUnit了，但它只输出整个差异，而不是两次约会之间的单个日期.

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

如何打印两个对象之间的所有日期？

Edit 2019

与此同时，课程的命名也发生了变化——NSDate现在只是Date.NSDateComponents现在被称为DateComponents.NSCalendar.currentCalendar()现在只有Calendar.current.

推荐答案

只需在日期上增加一天的单位，直到达到

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: [])!
}

更新为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.current.date(byAdding: .day, value: 1, to: date)!
}