Swift의 날짜 형식

Swift의 날짜 형식

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이 datetime을 날짜에서 어떻게 변환합니까?

이로부터 : 2016-02-29 12:24:26
~ : 2016 년 2 월 29 일

지금까지 이것은 내 코드이며 nil 값을 반환합니다.

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"
dateFormatter.timeZone = NSTimeZone(name: "UTC")
let date: NSDate? = dateFormatter.dateFromString("2016-02-29 12:24:26")
print(date)

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두 개의 다른을 선언해야 NSDateFormatters합니다. 첫 번째는 문자열을 a로 변환 NSDate하고 두 번째는 날짜를 형식으로 인쇄하는 것입니다.
이 코드를 시도하십시오.

let dateFormatterGet = NSDateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"

let dateFormatterPrint = NSDateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"

let date: NSDate? = dateFormatterGet.dateFromString("2016-02-29 12:24:26")
print(dateFormatterPrint.stringFromDate(date!))

Swift 3 이상 :

스위프트에서 3 개 NSDate클래스로 변경되었습니다 Date와 NSDateFormatter에 DateFormatter.

let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"

let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd,yyyy"

if let date = dateFormatterGet.date(from: "2016-02-29 12:24:26") {
    print(dateFormatterPrint.string(from: date))
} else {
   print("There was an error decoding the string")
}

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이것은 dateformater.dateformat을 사용하려는 사용자에게 유용 할 수 있습니다. 12.09.18당신이 사용 하고 싶다면dateformater.dateformat = "dd.MM.yy"

Wednesday, Sep 12, 2018           --> EEEE, MMM d, yyyy
09/12/2018                        --> MM/dd/yyyy
09-12-2018 14:11                  --> MM-dd-yyyy HH:mm
Sep 12, 2:11 PM                   --> MMM d, h:mm a
September 2018                    --> MMMM yyyy
Sep 12, 2018                      --> MMM d, yyyy
Wed, 12 Sep 2018 14:11:54 +0000   --> E, d MMM yyyy HH:mm:ss Z
2018-09-12T14:11:54+0000          --> yyyy-MM-dd'T'HH:mm:ssZ
12.09.18                          --> dd.MM.yy
10:41:02.112                      --> HH:mm:ss.SSS

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Swift 3 이상

let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .medium
dateFormatter.timeStyle = .none
dateFormatter.locale = Locale(identifier: "en_US")
print(dateFormatter.string(from: date)) // Jan 2, 2001

이는 앱을 현지화하려는 경우에도 유용합니다. 로케일 (식별자 :) 은 ISO 639-1 코드를 사용합니다 . Apple 문서 도 참조하십시오.

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Date대신 새 개체 가있는 Swift 3 버전 NSDate:

let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd HH:mm:ss"

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd,yyyy"

let date: Date? = dateFormatterGet.date(from: "2017-02-14 17:24:26")
print(dateFormatter.string(from: date!))

편집 : mitul-nakum 제안 후

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스위프트-4.0

2018-02-02 06:50:16 +0000 변환 02-02-2018

 extension Date {
   static func getFormattedDate(string: String) -> String{
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss +zzzz" // This formate is input formated .

        let formateDate = dateFormatter.date(from:"2018-02-02 06:50:16 +0000")!
        dateFormatter.dateFormat = "dd-MM-yyyy" // Output Formated

        print ("Print :\(dateFormatter.string(from: formateDate))")//Print :02-02-2018
        return dateFormatter.string(from: formateDate)
    }
}

스위프트-4.0

2018-02-01T19 : 10 : 04 + 00 : 00 변환 Feb 01,2018

extension Date {
    static func getFormattedDate(string: String , formatter:String) -> String{
        let dateFormatterGet = DateFormatter()
        dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"

        let dateFormatterPrint = DateFormatter()
        dateFormatterPrint.dateFormat = "MMM dd,yyyy"

        let date: Date? = dateFormatterGet.date(from: "2018-02-01T19:10:04+00:00")
        print("Date",dateFormatterPrint.string(from: date!)) // Feb 01,2018
        return dateFormatterPrint.string(from: date!);
    }
}

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스위프트 3

let date : Date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy"
let todaysDate = dateFormatter.string(from: date)

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내 문제를 다음과 같이 형식 yyyy-MM-dd'T'HH:mm:ss.SSS'Z'(예 : 2018-06-15T00 : 00 : 00.000Z)으로 해결했습니다.

func formatDate(date: String) -> String {
   let dateFormatterGet = DateFormatter()
   dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"

   let dateFormatter = DateFormatter()
   dateFormatter.dateStyle = .medium
   dateFormatter.timeStyle = .none
   //    dateFormatter.locale = Locale(identifier: "en_US") //uncomment if you don't want to get the system default format.

   let dateObj: Date? = dateFormatterGet.date(from: date)

   return dateFormatter.string(from: dateObj!)
}

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Date확장 기능 이있는 Swift 3

extension Date {
    func string(with format: String) -> String {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = format
        return dateFormatter.string(from: self)
    }
}

그런 다음 다음과 같이 사용할 수 있습니다.

let date = Date()
date.string(with: "MMM dd, yyyy")

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형식 날짜의 또 다른 중요한 가능성. 이 스크린 샷은 Apple의 앱 "News"에 속합니다.

다음은 코드입니다.

let dateFormat1 = DateFormatter()
dateFormat1.dateFormat = "EEEE"
let stringDay = dateFormat1.string(from: Date())

let dateFormat2 = DateFormatter()
dateFormat2.dateFormat = "MMMM"
let stringMonth = dateFormat2.string(from: Date())

let dateFormat3 = DateFormatter()
dateFormat3.dateFormat = "dd"
let numDay = dateFormat3.string(from: Date())

let stringDate = String(format: "%@\n%@ %@", stringDay.uppercased(), stringMonth.uppercased(), numDay)

lorenzoliveto가 제안한 대안에 추가 할 사항이 없습니다. 완벽합니다.

let dateFormat = DateFormatter()
dateFormat.dateFormat = "EEEE\nMMMM dd"
let stringDate = dateFormat.string(from: Date()).uppercased()

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2016-02-29 12:24:26을 날짜로 변환하려면 다음 날짜 포맷터를 사용하세요.

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss"

편집 : 2016 년 2 월 29 일 출력을 얻으려면 다음 날짜 포맷터를 사용하십시오.

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MMM dd, yyyy"

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just use below function to convert date format:-

  let convertedFormat =  convertToString(dateString: "2019-02-12 11:23:12", formatIn: "yyyy-MM-dd hh:mm:ss", formatOut: "MMM dd, yyyy")    //calling function

   print(convertedFormat) // feb 12 2019


 func convertToString (dateString: String, formatIn : String, formatOut : String) -> String {

    let dateFormater = DateFormatter()
    dateFormater.timeZone = NSTimeZone(abbreviation: "UTC") as TimeZone!
    dateFormater.dateFormat = formatIn
    let date = dateFormater.date(from: dateString)

    dateFormater.timeZone = NSTimeZone.system

    dateFormater.dateFormat = formatOut
    let timeStr = dateFormater.string(from: date!)
    return timeStr
 }

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If you want to parse date from "1996-12-19T16:39:57-08:00", use the following format "yyyy-MM-dd'T'HH:mm:ssZZZZZ":

let RFC3339DateFormatter = DateFormatter()
RFC3339DateFormatter.locale = Locale(identifier: "en_US_POSIX")
RFC3339DateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
RFC3339DateFormatter.timeZone = TimeZone(secondsFromGMT: 0)

/* 39 minutes and 57 seconds after the 16th hour of December 19th, 1996 with an offset of -08:00 from UTC (Pacific Standard Time) */
let string = "1996-12-19T16:39:57-08:00"
let date = RFC3339DateFormatter.date(from: string)

from Apple https://developer.apple.com/documentation/foundation/dateformatter

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swift 3

func dataFormat(dataJ: Double) -> String {

        let dateFormatter = DateFormatter()
        dateFormatter.dateStyle = .long
        dateFormatter.timeStyle = .none
        let date = Date(timeIntervalSince1970: dataJ)
        return (dataJ != nil) ? "Today, \(dateFormatter.string(from: date))" : "Date Invalid"

    }

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Place it in extension and call it like below. It's easy to use throughout the application.

self.getFormattedDate(strDate: "20-March-2019", currentFomat: "dd-MMM-yyyy", expectedFromat: "yyyy-MM-dd")

Implementation

func getFormattedDate(strDate: String , currentFomat:String, expectedFromat: String) -> String{
        let dateFormatterGet = DateFormatter()
        dateFormatterGet.dateFormat = currentFomat

        let date : Date = dateFormatterGet.date(from: strDate)!

        dateFormatterGet.dateFormat = expectedFromat
        return dateFormatterGet.string(from: date)
    }

---

Swift 4, 4.2 and 5

func getFormattedDate(date: Date, format: String) -> String {
        let dateformat = DateFormatter()
        dateformat.dateFormat = format
        return dateformat.string(from: date)
}

let formatingDate = getFormattedDate(date: Date(), format: "dd-MMM-yyyy")
        print(formatingDate)

참고URL : https://stackoverflow.com/questions/35700281/date-format-in-swift