Question

如何从Swift中的日期中提取年数，月数和天数。

到目前为止，我在名为DatePickerController的类文件中有以下代码。

class DatePickerController: UIViewController {

    @IBOutlet var datePicker:UIDatePicker!
    @IBOutlet var dateDisplay: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func datePickerChanged(sender: AnyObject) {
        setDate()
    }

    let dateFormatter = NSDateFormatter()

    // MARK: - Date Format
    func setDate() {
        dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle
        dateDisplay.text = dateFormatter.stringFromDate(datePicker.date)
    }

}

我将为年，月，日创建单独的UILables。

Answer 1

您可以使用// change this $a = $xd1->ServiceHotel[0]->BookingStatus; $b = $xd1->ServiceHotel[1]->BookingStatus; // to this $a = $xd1->ServiceHotel[0]->BookingStatus->asXML(); $b = $xd1->ServiceHotel[1]->BookingStatus->asXML();在两个日期之间获取NSCalendar。在Swift 3中：

NSDateComponents

或者在Swift 2中：

let components = Calendar.current.dateComponents([.day, .month, .year], from: date1, to: date2)
let dayString = "\(components.day!)"
let monthString = "\(components.month!)"
let yearString = "\(components.year!)"

也许更简单，如果您想要一个代表这两个日期之间经过时间的字符串，您可以使用let components = NSCalendar.currentCalendar().components([.Day, .Month, .Year], fromDate: date1, toDate: date2, options: []) let dayString = "\(components.day)" let monthString = "\(components.month)" let yearString = "\(components.year)"，例如，在Swift 3中：

NSDateComponentsFormatter

或者在Swift 2中：

let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.day, .month, .year]
formatter.unitsStyle = .full
let string = formatter.string(from: date1, to: date2)

此字符串也已本地化。

Answer 2

就像你说的那样，每个日期组件都需要UILabel。然后，您可以使用自定义日期格式字符串提取组件，而不是使用NSDateFormatterStye.ShortStyle。这为您提供了最大的灵活性。格式字符串遵循unicode standard。

我无法在项目的上下文中测试代码，但如果添加标签并将它们正确连接到Xcode，我相信这段代码将完全符合您的要求：

class DatePickerController: UIViewController {

  @IBOutlet var datePicker:UIDatePicker!
  @IBOutlet var dayDisplay: UILabel!
  @IBOutlet var monthDisplay: UILabel!
  @IBOutlet var yearDisplay: UILabel!

  override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
  }

  override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
  }

  @IBAction func datePickerChanged(sender: AnyObject) {
    setDate()
  }

  let dateFormatter = NSDateFormatter()

  // MARK: - Date Format
  func setDate() {
    dateFormatter.dateFormat = "dd"
    dayDisplay.text = dateFormatter.stringFromDate(datePicker.date)
    dateFormatter.dateFormat = "MM"
    monthDisplay.text = dateFormatter.stringFromDate(datePicker.date)
    dateFormatter.dateFormat = "yyyy"
    yearDisplay.text = dateFormatter.stringFromDate(datePicker.date)
  }

}

Answer 3

您可以使用components(fromDate: toDate: options:) <{1}}方法NSCalender来使用let date = NSDate(timeIntervalSinceNow: -123123123) extension NSDate { func intereval(date:NSDate) -> (year: Int, month:Int, day:Int) { let calender = NSCalendar.currentCalendar() let components = calender.components([.Year, .Month, .Day], fromDate: date, toDate: self, options:.MatchStrictly) return (components.year, components.month, components.day) } } let component = NSDate().intereval(date) print(component.year) print(component.month) print(component.day)来检索年，月和日

示例

{{1}}

Answer 4

import Foundation

let now = NSDate()
now.description.characters.split {
    " -".characters.contains($0)
}.enumerate().forEach {
    print($0.0,String($0.1))
}
/*
0 2015
1 12
2 26
3 19:34:33
4 +0000
*/

如何从Swift中的日期中提取年数，月数和天数

4 个答案: