ios - swift 2 : How to calculate the number of days between current iPhone time and date I provide

Question

我看了很多帖子，但都无法解决问题。我需要知道从 iPhone 的日期和我提供的较旧日期算起，过去了多少天/小时/分钟。我尝试了不同的教程并在 stackoverflow 上发布，但没有任何效果。请帮帮我谢谢。

class timeElapsed {

init?(startDate: NSDate, endDate: NSDate){

    let calendar = NSCalendar.currentCalendar()

    let components = calendar.components([.Day, .Month, .Year], fromDate: startDate, toDate: endDate, options: [])

   print(components.day)

return nil

}

使用此代码，它可以工作，但它给了我 7 天的差异，而不是 11 天的差异。事实上，日期是 endDate: 2015-10-07 14:27:53 +0000 startDate: 2015-09-26 15:17:55 +0000

Answer 1

这应该有效:

func timeBetween(startDate: NSDate, endDate: NSDate) -> [Int]
{
    let calendar = NSCalendar.currentCalendar()
    
    let components = calendar.components([.Day, .Month, .Year], fromDate: startDate, toDate: endDate, options: [])
    
    return [components.day, components.hour, components.minute]
}

您传递开始日期和结束日期并返回一个整数数组。

示例:

let nowDate:NSDate // current date
let historydate:NSDate // some old date
    
let timeSince:[Int] = timeBetween(historydate, endDate: nowDate)
timeSince[0] // days
timeSince[1] // hours
timeSince[2] // minutes