Saya ingin mengonversi "2014-07-15 06: 55: 14.198000 + 00: 00" tanggal string ini ke NSDate di Swift.

coba ini:

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = /* find out and place date format from 
                            * http://userguide.icu-project.org/formatparse/datetime
                            */
let date = dateFormatter.dateFromString(/* your_date_string */)

Untuk kueri lebih lanjut, periksa NSDateFormatter dan DateFormatter kelas kerangka kerja Foundation untuk Objective-C dan Swift, masing-masing.

Swift 3 dan yang lebih baru (Swift 4 termasuk)

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = /* date_format_you_want_in_string from
                            * http://userguide.icu-project.org/formatparse/datetime
                            */
guard let date = dateFormatter.date(from: /* your_date_string */) else {
   fatalError("ERROR: Date conversion failed due to mismatched format.")
}

// use date constant here

Cepat 4

import Foundation

let dateString = "2014-07-15" // change to your date format

var dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"

let date = dateFormatter.date(from: dateString)
println(date)

Cepat 3

import Foundation

var dateString = "2014-07-15" // change to your date format

var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"

var date = dateFormatter.dateFromString(dateString)
println(date)

Saya bisa melakukannya dengan kode ini.

 func convertDateFormatter(date: String) -> String
 {

    let dateFormatter = NSDateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"//this your string date format
    dateFormatter.timeZone = NSTimeZone(name: "UTC")
    let date = dateFormatter.dateFromString(date)


    dateFormatter.dateFormat = "yyyy MMM EEEE HH:mm"///this is what you want to convert format
    dateFormatter.timeZone = NSTimeZone(name: "UTC")
    let timeStamp = dateFormatter.stringFromDate(date!)


    return timeStamp
}

Diperbarui untuk Swift 3.

func convertDateFormatter(date: String) -> String
{

    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"//this your string date format
    dateFormatter.timeZone = NSTimeZone(name: "UTC") as TimeZone!
    let date = dateFormatter.date(from: date)


    dateFormatter.dateFormat = "yyyy MMM EEEE HH:mm"///this is what you want to convert format
    dateFormatter.timeZone = NSTimeZone(name: "UTC") as TimeZone!
    let timeStamp = dateFormatter.string(from: date!)


    return timeStamp
}

Detail

• Swift 4, Xcode 9.2
• Swift 5, Xcode 10.2 (10E125)

Larutan

import Foundation

extension DateFormatter {

    convenience init (format: String) {
        self.init()
        dateFormat = format
        locale = Locale.current
    }
}

extension String {

    func toDate (dateFormatter: DateFormatter) -> Date? {
        return dateFormatter.date(from: self)
    }

    func toDateString (dateFormatter: DateFormatter, outputFormat: String) -> String? {
        guard let date = toDate(dateFormatter: dateFormatter) else { return nil }
        return DateFormatter(format: outputFormat).string(from: date)
    }
}

extension Date {

    func toString (dateFormatter: DateFormatter) -> String? {
        return dateFormatter.string(from: self)
    }
}

Pemakaian

var dateString = "14.01.2017T14:54:00"
let dateFormatter = DateFormatter(format: "dd.MM.yyyy'T'HH:mm:ss")
let date = Date()

print("original String with date:               \(dateString)")
print("date String() to Date():                 \(dateString.toDate(dateFormatter: dateFormatter)!)")
print("date String() to formated date String(): \(dateString.toDateString(dateFormatter: dateFormatter, outputFormat: "dd MMMM")!)")
let dateFormatter2 = DateFormatter(format: "dd MMM HH:mm")
print("format Date():                           \(date.toString(dateFormatter: dateFormatter2)!)")

Hasil

Informasi lebih lanjut

Tentang format tanggal

Jika Anda perlu sering menguraikan string ke dalam tanggal, Anda mungkin ingin memindahkan fungsionalitas ke ekstensi. Saya membuat file sharedCode.swift dan meletakkan ekstensi saya di sana:

extension String
{   
    func toDateTime() -> NSDate
    {
        //Create Date Formatter
        let dateFormatter = NSDateFormatter()

        //Specify Format of String to Parse
        dateFormatter.dateFormat = "yyyy-MM-dd hh:mm:ss.SSSSxxx"

        //Parse into NSDate
        let dateFromString : NSDate = dateFormatter.dateFromString(self)!

        //Return Parsed Date
        return dateFromString
    }
}

Kemudian jika Anda ingin mengubah string Anda menjadi NSDate, Anda bisa menulis sesuatu seperti:

var myDate = myDateString.toDateTime()

Untuk Swift 3

func stringToDate(_ str: String)->Date{
    let formatter = DateFormatter()
    formatter.dateFormat="yyyy-MM-dd hh:mm:ss Z"
    return formatter.date(from: str)!
}
func dateToString(_ str: Date)->String{
    var dateFormatter = DateFormatter()
    dateFormatter.timeStyle=DateFormatter.Style.short
    return dateFormatter.string(from: str)
}

Fragmen kode pada halaman QA ini "terbalik" ...

Hal pertama yang Apple sebutkan adalah Anda menyimpan cache ...

Tautan ke Apple doco yang menyatakan persis bagaimana melakukan ini:

Cache Formatters for Efficiency Membuat formatter tanggal bukanlah operasi yang murah. ... cache satu contoh ...

Gunakan global ...

let df : DateFormatter = {
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyy-MM-dd"
    return formatter 
}()

Maka cukup gunakan formatter itu di mana saja ...

let s = df.string(from: someDate)

atau

let d = df.date(from: someString)

Atau gunakan salah satu dari banyak, banyak metode lain yang nyaman di DateFormatter.

Sesederhana itu.

(Jika Anda menulis ekstensi pada String, kode Anda benar-benar "terbalik" - Anda tidak dapat menggunakan panggilan dateFormatter!)

Perhatikan bahwa biasanya Anda akan memiliki beberapa global tersebut .. seperti "formatForClient" "formatForPubNub" "formatForDisplayOnInvoiceScreen" .. dll.

Ekstensi dukungan Swift, dengan ekstensi Anda dapat menambahkan fungsi baru untuk yang sudah ada class, structure, enumeration, atau protocoljenis.

Anda dapat menambahkan initfungsi baru ke NSDateobjek dengan memeras objek menggunakan extensionkata kunci.

extension NSDate
{
    convenience
    init(dateString:String) {
        let dateStringFormatter = NSDateFormatter()
        dateStringFormatter.dateFormat = "yyyyMMdd"
        dateStringFormatter.locale = NSLocale(localeIdentifier: "fr_CH_POSIX")
        let d = dateStringFormatter.dateFromString(dateString)!
        self.init(timeInterval:0, sinceDate:d)
    }
} 

Sekarang Anda bisa init objek NSDate menggunakan:

let myDateObject = NSDate(dateString:"2010-12-15 06:00:00")

Sejak Swift 3, banyak awalan NS telah dijatuhkan.

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ" 
/* date format string rules
 * http://userguide.icu-project.org/formatparse/datetime
 */

let date = dateFormatter.date(from: dateString)

Cepat 3,4:

2 konversi yang bermanfaat:

string(from: Date) // to convert from Date to a String
date(from: String) // to convert from String to Date

Penggunaan: 1.

let date = Date() //gives today's date
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd.MM.yyyy"
let todaysDateInUKFormat = dateFormatter.string(from: date)

2.

 let someDateInString = "23.06.2017"
 var getDateFromString = dateFormatter.date(from: someDateInString)

UNTUK SWIFT 3.1

func convertDateStringToDate(longDate: String) -> String{

    /* INPUT: longDate = "2017-01-27T05:00:00.000Z"
     * OUTPUT: "1/26/17"
     * date_format_you_want_in_string from
     * http://userguide.icu-project.org/formatparse/datetime
     */

    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
    let date = dateFormatter.date(from: longDate)

    if date != nil {

        let formatter = DateFormatter()
        formatter.dateStyle = .short
        let dateShort = formatter.string(from: date!)

        return dateShort

    } else {

        return longDate

    }
}

CATATAN: INI AKAN KEMBALI STRING ASLI JIKA KESALAHAN

Untuk menambahkan String dalam Format Tanggal dalam Swift, saya melakukan ini

 var dataFormatter:NSDateFormatter = NSDateFormatter()
                dataFormatter.dateFormat = "dd-MMMM 'at' HH:mm a"

cell.timeStamplbl.text = dataFormatter.stringFromDate(object.createdAt)

Ini bekerja untuk saya ..

    import Foundation
    import UIKit

    //dateString = "01/07/2017"
    private func parseDate(_ dateStr: String) -> String {
            let simpleDateFormat = DateFormatter()
            simpleDateFormat.dateFormat = "dd/MM/yyyy" //format our date String
            let dateFormat = DateFormatter()
            dateFormat.dateFormat = "dd 'de' MMMM 'de' yyyy" //format return

            let date = simpleDateFormat.date(from: dateStr)
            return dateFormat.string(from: date!)
    }

Berikut adalah beberapa opsi konversi format string to date yang dapat digunakan di iOS cepat.

1. Thursday, Dec 27, 2018 format = EEEE, MMM d, yyyy
2. 12/27/2018 format = MM/dd/yyyy
3. 12-27-2018 09:59 format = MM-dd-yyyy HH:mm
4. Dec 27, 9:59 AM format = MMM d, h:mm a
5. December 2018 format = MMMM yyyy
6. Dec 27, 2018 format = MMM d, yyyy
7. Thu, 27 Dec 2018 09:59:19 +0000 format = E, d MMM yyyy HH:mm:ss Z
8. 2018-12-27T09:59:19+0000 format = yyyy-MM-dd'T'HH:mm:ssZ
9. 27.12.18 format = dd.MM.yy
10. 09:59:19.815 format = HH:mm:ss.SSS

Swift: iOS
if we have string, convert it to NSDate,

var dataString = profileValue["dob"] as String
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"

// convert string into date
let dateValue:NSDate? = dateFormatter.dateFromString(dataString)

if you have and date picker parse date like this

// to avoid any nil value
if let isDate = dateValue {
self.datePicker.date = isDate
}

Anda dapat mencoba kode cepat ini

    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "dd/MM/yyyy"//same as strDate date formator
    dateFormatter.timeZone = TimeZone(abbreviation: "GMT+0:00")//Must used if you get one day less in conversion
    let convertedDateObject = dateFormatter.date(from: strDate)

SWIFT 5 , Xcode 11.0

Masukkan (date in string) Anda dalam "dateString" dan dalam format pass "dateFormat" yang Anda inginkan. Untuk memilih format, gunakan situs web NDateFormatter .

func getDateFrom(dateString: String, dateFormat: String) -> Date? {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = dateFormat
    dateFormatter.locale = Locale(identifier: "en_US")
    guard let date = dateFormatter.date(from: dateString) else {return nil}
    return date
}

import Foundation

let now : String = "2014-07-16 03:03:34 PDT"
var date : NSDate
var dateFormatter : NSDateFormatter

date = dateFormatter.dateFromString(now)

date // $R6: __NSDate = 2014-07-16 03:03:34 PDT

https://developer.apple.com/library/prerelease/mac/documentation/Cocoa/Reference/Foundation/Classes/NSDateFormatter_Class/index.html#//apple_ref/doc/uid/20000447-SW32