如何将此字符串“2016-04-14T10:44:00+0000”转换为NSDate并只保留年、月、日、小时?
中间的T真的让我在处理日期时不习惯。
试试下面的日期格式。
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZZZ"
let date = dateFormatter. dateFromString (strDate)
希望能有所帮助。
Swift 4.1:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZZZ"
let date = dateFormatter.date(from: strDate)
嗨，你有单独的T格式，然后转换为你喜欢
// create dateFormatter with UTC time format
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
dateFormatter.timeZone = NSTimeZone(name: "UTC")
let date = dateFormatter.dateFromString("2015-04-01T11:42:00")
// change to a readable time format and change to local time zone
dateFormatter.dateFormat = "EEE, MMM d, yyyy - h:mm a"
dateFormatter.timeZone = NSTimeZone.localTimeZone()
let timeStamp = dateFormatter.stringFromDate(date!)
Convert the ISO8601 string to date let isoDate = "2016-04-14T10:44:00+0000" let dateFormatter = DateFormatter() dateFormatter.locale = Locale(identifier: "en_US_POSIX") // set locale to reliable US_POSIX dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ" let date = dateFormatter.date(from:isoDate)! Get the date components for year, month, day and hour from the date let calendar = Calendar.current let components = calendar.dateComponents([.year, .month, .day, .hour], from: date) Finally create a new Date object and strip minutes and seconds let finalDate = calendar.date(from:components)
还可以考虑iOS 10 / macOS 10.12中引入的方便格式化程序ISO8601DateFormatter:
let isoDate = "2016-04-14T10:44:00+0000"
let dateFormatter = ISO8601DateFormatter()
let date = dateFormatter.date(from:isoDate)!
只需要传递dateformate和date，就可以得到年，月，日，小时。额外的信息
func GetOnlyDateMonthYearFromFullDate(currentDateFormate:NSString , conVertFormate:NSString , convertDate:NSString ) -> NSString
{
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = currentDateFormate as String
let formatter = NSDateFormatter()
formatter.dateFormat = Key_DATE_FORMATE as String
let finalDate = formatter.dateFromString(convertDate as String)
formatter.dateFormat = conVertFormate as String
let dateString = formatter.stringFromDate(finalDate!)
return dateString
}
获得一年
let Year = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "YYYY", convertDate: "2016-04-14T10:44:00+0000") as String
让月
let month = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "MM", convertDate: "2016-04-14T10:44:00+0000") as String
得到一天
let day = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "dd", convertDate: "2016-04-14T10:44:00+0000") as String
把小时
let hour = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "hh", convertDate: "2016-04-14T10:44:00+0000") as String
在Swift 4.1你可以做:
func getDate() -> Date? {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
dateFormatter.timeZone = TimeZone.current
dateFormatter.locale = Locale.current
return dateFormatter.date(from: "2015-04-01T11:42:00") // replace Date String
}
Swift 3.0 - 4.2
import Foundation
extension String {
func toDate(withFormat format: String = "yyyy-MM-dd HH:mm:ss")-> Date?{
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone(identifier: "Asia/Tehran")
dateFormatter.locale = Locale(identifier: "fa-IR")
dateFormatter.calendar = Calendar(identifier: .gregorian)
dateFormatter.dateFormat = format
let date = dateFormatter.date(from: self)
return date
}
}
extension Date {
func toString(withFormat format: String = "EEEE ، d MMMM yyyy") -> String {
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "fa-IR")
dateFormatter.timeZone = TimeZone(identifier: "Asia/Tehran")
dateFormatter.calendar = Calendar(identifier: .persian)
dateFormatter.dateFormat = format
let str = dateFormatter.string(from: self)
return str
}
}
请使用ISO8601解析库来执行此操作。编码字符串的方法太多了。不要依赖于特定的格式，也不要依赖于始终发送相同的服务器。问题从末尾的“Z”开始，它将扩展到标准的所有品种。解析库将处理所有情况，并始终提供安全转换——而固定格式化字符串在将来可能会失败。
您可以使用这些库之一。CococaPods上也有:
https://github.com/boredzo/iso-8601-date-formatter/
https://github.com/malcommac/SwiftDate
看一下实现。它们都有几百行——这是有原因的。
关于这个问题:你可以使用NSDateComponents从日期中提取日期组件。网站上的例子正好符合你的情况。
https://developer.apple.com/documentation/foundation/nscalendar/1414841-components?language=objc
请注意，转换日期时会考虑到时区。你可能想显式地设置NSCalendar的locale。
在swift4,
var Msg_Date_ = "2019-03-30T05:30:00+0000"
let dateFormatterGet = DateFormatter()
dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
let dateFormatterPrint = DateFormatter()
dateFormatterPrint.dateFormat = "MMM dd yyyy h:mm a" //"MMM d, h:mm a" for Sep 12, 2:11 PM
let datee = dateFormatterGet.date(from: Msg_Date_)
Msg_Date_ = dateFormatterPrint.string(from: datee ?? Date())
print(Msg_Date_)
//输出:- 2019年3月30日05:30 PM
只是 步骤1 > 从JSON或dataSource获取String值
步骤2 >创建本地变量并赋值。
let startDate = CurrentDashBoard.startdate
步骤3>创建DateFormatter实例。
let dateFormatter = DateFormatter()
步骤4 > 从dateFormatter调用dateFormat并提供保存的日期dataType。
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm:ss"("may be String formate")
步骤5 > 将Local变量赋给要转换的变量。
let dateFromStringstartDate : NSDate = dateFormatter.date(from: startDate)! as NSDate
步骤6 > 请按以下代码填写所需日期。
dateFormatter.dateFormat = "MM/dd/yyyy HH:mm:ss"
步骤6>分配给label/text
cell.lblStartDate.text = String(format: "%@", strstartDate)
代码:
let startDate = CurrentDashBoard.startdate let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm:ss" let dateFromStringstartDate :
NSDate = dateFormatter.date(from: startDate)! as NSDate
dateFormatter.dateFormat = "MM/dd/yyyy HH:mm:ss"
let strstartDate = dateFormatter.string(from: dateFromStringstartDate as Date)
斯威夫特5。看是否一个日期已经通过:
let expiryDate = "2020-01-10" // Jan 10 2020
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
if Date() < dateFormatter.date(from: expiryDate) ?? Date() {
print("Not Yet expiryDate")
} else {
print("expiryDate has passed")
}
创建全局函数
func convertDateFormat(inputDate: String) -> String {
let olDateFormatter = DateFormatter()
olDateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
let oldDate = olDateFormatter.date(from: inputDate)
let convertDateFormatter = DateFormatter()
convertDateFormatter.dateFormat = "MMM dd yyyy h:mm a"
return convertDateFormatter.string(from: oldDate!)
}
调用函数并在其中传递值
get_OutputStr = convertDateFormat(inputDate: "2019-03-30T05:30:00+0000")
这里是输出
Feb 25 2020 4:51 PM
我对这种格式也很着迷。
请参阅下面的解决方案。
你的字符串来自你的背部或其他来源:
let isoDate = "2020-05-06 20:00:00-03"
识别日期格式
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd' 'HH:mm:ssZ"
let date = dateFormatter.date(from:isoDate)!
现在您已经将日期设置为date()，您可以使用formatDate.string将其更改为您想要的任何格式
let formatDate = DateFormatter()
formatDate.dateFormat = "dd/MM/yyyy HH:mm"
let drawDate = formatDate.string(from: date)
print(drawDate)
输出:
06/05/2020 20:00
就用SwifterSwift吧。
stringDate = "2020-04-26T08:56:17.987Z"
let date = Date(iso8601String: stringDate)
有时，在swift中将字符串转换为日期可能会导致返回nil，因此您应该在格式中添加“!”标记。日期函数!
let dateFormatterUK = DateFormatter()
dateFormatterUK.dateFormat = "dd-MM-yyyy"
let stringDate = "11-03-2018"
let date = dateFormatterUK.date(from: stringDate)!
从iOS 15.0开始，我们可以更快速地将字符串转换为日期:
let strategy = Date.ParseStrategy(format: "\(year: .defaultDigits)-\(month: .twoDigits)-\(day: .twoDigits)T\(hour: .twoDigits(clock: .twentyFourHour, hourCycle: .zeroBased)):\(minute: .twoDigits):\(second: .twoDigits)\(timeZone: .iso8601(.short))", timeZone: .current)
let date = try? Date("2016-04-14T10:44:00+0000", strategy: strategy)
在swift中使用字符串扩展将字符串转换为日期 Swift - 5.0
extension String {
public enum DateFormatType {
/// The ISO8601 formatted year "yyyy" i.e. 1997
case isoYear
/// The ISO8601 formatted year and month "yyyy-MM" i.e. 1997-07
case isoYearMonth
/// The ISO8601 formatted date "yyyy-MM-dd" i.e. 1997-07-16
case isoDate
/// The ISO8601 formatted date and time "yyyy-MM-dd'T'HH:mmZ" i.e. 1997-07-16T19:20+01:00
case isoDateTime
/// The ISO8601 formatted date, time and sec "yyyy-MM-dd'T'HH:mm:ssZ" i.e. 1997-07-16T19:20:30+01:00
case isoDateTimeSec
/// The ISO8601 formatted date, time and millisec "yyyy-MM-dd'T'HH:mm:ss.SSSZ" i.e. 1997-07-16T19:20:30.45+01:00
case isoDateTimeMilliSec
/// The dotNet formatted date "/Date(%d%d)/" i.e. "/Date(1268123281843)/"
case dotNet
/// The RSS formatted date "EEE, d MMM yyyy HH:mm:ss ZZZ" i.e. "Fri, 09 Sep 2011 15:26:08 +0200"
case rss
/// The Alternative RSS formatted date "d MMM yyyy HH:mm:ss ZZZ" i.e. "09 Sep 2011 15:26:08 +0200"
case altRSS
/// The http header formatted date "EEE, dd MM yyyy HH:mm:ss ZZZ" i.e. "Tue, 15 Nov 1994 12:45:26 GMT"
case httpHeader
/// A generic standard format date i.e. "EEE MMM dd HH:mm:ss Z yyyy"
case standard
/// A custom date format string
case custom(String)
/// The local formatted date and time "yyyy-MM-dd HH:mm:ss" i.e. 1997-07-16 19:20:00
case localDateTimeSec
/// The local formatted date "yyyy-MM-dd" i.e. 1997-07-16
case localDate
/// The local formatted time "hh:mm a" i.e. 07:20 am
case localTimeWithNoon
/// The local formatted date and time "yyyyMMddHHmmss" i.e. 19970716192000
case localPhotoSave
case birthDateFormatOne
case birthDateFormatTwo
///
case messageRTetriveFormat
///
case emailTimePreview
var stringFormat:String {
switch self {
//handle iso Time
case .birthDateFormatOne: return "dd/MM/YYYY"
case .birthDateFormatTwo: return "dd-MM-YYYY"
case .isoYear: return "yyyy"
case .isoYearMonth: return "yyyy-MM"
case .isoDate: return "yyyy-MM-dd"
case .isoDateTime: return "yyyy-MM-dd'T'HH:mmZ"
case .isoDateTimeSec: return "yyyy-MM-dd'T'HH:mm:ssZ"
case .isoDateTimeMilliSec: return "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
case .dotNet: return "/Date(%d%f)/"
case .rss: return "EEE, d MMM yyyy HH:mm:ss ZZZ"
case .altRSS: return "d MMM yyyy HH:mm:ss ZZZ"
case .httpHeader: return "EEE, dd MM yyyy HH:mm:ss ZZZ"
case .standard: return "EEE MMM dd HH:mm:ss Z yyyy"
case .custom(let customFormat): return customFormat
//handle local Time
case .localDateTimeSec: return "yyyy-MM-dd HH:mm:ss"
case .localTimeWithNoon: return "hh:mm a"
case .localDate: return "yyyy-MM-dd"
case .localPhotoSave: return "yyyyMMddHHmmss"
case .messageRTetriveFormat: return "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
case .emailTimePreview: return "dd MMM yyyy, h:mm a"
}
}
}
func toDate(_ format: DateFormatType = .isoDate) -> Date?{
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = format.stringFormat
let date = dateFormatter.date(from: self)
return date
}
}
我们用like
string.toDate(.isoDate)
"1997-05-24".toDate(.isoDate)
那SwiftDate呢?Swift最好的日期和时间解析和操作库。
https://github.com/malcommac/SwiftDate#1-date-parsing
使用可可豆荚安装: https://github.com/malcommac/SwiftDate/blob/master/Documentation/0.Informations.md#installation
然后:
import SwiftDate
// All default datetime formats (15+) are recognized automatically
let _ = "2010-05-20 15:30:00".toDate()
// You can also provide your own format!
let _ = "2010-05-20 15:30".toDate("yyyy-MM-dd HH:mm")
// All ISO8601 variants are supported too with timezone parsing!
let _ = "2017-09-17T11:59:29+02:00".toISODate()
// RSS, Extended, HTTP, SQL, .NET and all the major variants are supported!
let _ = "19 Nov 2015 22:20:40 +0100".toRSS(alt: true)
斯威夫特5.6
这是一个简单的方法来获得一个字符串，并将其转换回字符串与日期的结构通过字符串扩展
日期字符串示例"2022-03-15T07:13:49.607+00:00"
如果日期的格式不是“yyyy-MM-dd'T hh:mm:ss”。SSSSSSSZ” 它将返回01-01-70
import Foundation
extension String {
func convertToDate() -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSSSSSZ"
if let dt = dateFormatter.date(from: self) {
dateFormatter.dateFormat = "MM-dd-yy"
let formatedStringDate = dateFormatter.string(from: dt)
return formatedStringDate
}
return "01-01-70"
}
}
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