如何将此字符串"2016-04-14T10:44:00+0000"
转换为NSDate
并仅保留年,月,日,小时?
它中间的T
确实抛弃了我在处理日期时所习惯的。
答案 0 :(得分:118)
将ISO8601 sting转换为日期
let isoDate = "2016-04-14T10:44:00+0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
dateFormatter.locale = Locale(identifier: "en_US_POSIX") // set locale to reliable US_POSIX
let date = dateFormatter.date(from:isoDate)!
从日期
获取年,月,日和小时的日期组件let calendar = Calendar.current
let components = calendar.dateComponents([.year, .month, .day, .hour], from: date)
最后创建一个新的Date
对象并删除分钟和秒
let finalDate = calendar.date(from:components)
还要考虑iOS 10 / macOS 12中引入的便捷格式化程序ISO8601DateFormatter
:
let isoDate = "2016-04-14T10:44:00+0000"
let dateFormatter = ISO8601DateFormatter()
let date = dateFormatter.date(from:isoDate)!
答案 1 :(得分:23)
请尝试以下日期格式。
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZZZ"
let date = dateFormatter. dateFromString (strDate)
希望有所帮助......
Swift 4.1:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZZZ"
let date = dateFormatter.date(from: strDate)
答案 2 :(得分:9)
在Swift 4.1中你可以这样做:
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
}
答案 3 :(得分:7)
使全局功能
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!)
}
被调用的函数并在其中传递值
get_OutputStr = convertDateFormat(inputDate: "2019-03-30T05:30:00+0000")
这是输出
Feb 25 2020 4:51 PM
答案 4 :(得分:6)
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 strMonth = dateFormatter.string(from: self)
return strMonth
}
}
答案 5 :(得分:5)
嗨您有单独的T格式,然后根据需要进行转换
// 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!)
答案 6 :(得分:3)
只要您传递dateformate
和您的约会对象,即可获得Year,month,day,hour
。 Extra info
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
}
获取年份
let Year = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "YYYY", convertDate: "2016-04-14T10:44:00+0000") as String
获得月份
let month = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "MM", convertDate: "2016-04-14T10:44:00+0000") as String
获取日
let day = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "dd", convertDate: "2016-04-14T10:44:00+0000") as String
获取时间
let hour = self.GetOnlyDateMonthYearFromFullDate("yyyy-MM-dd'T'HH:mm:ssZ", conVertFormate: "hh", convertDate: "2016-04-14T10:44:00+0000") as String
答案 7 :(得分:3)
在swift4中,
let 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:-Mar 30 2019 05:30 PM
答案 8 :(得分:2)
我也对这种格式感到疯狂。
请参阅下面的解决方案。
来自您的背部或其他来源的字符串:
let isoDate = "2020-05-06 20:00:00-03"
确定日期格式
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
dateFormatter.dateFormat = "yyyy-MM-dd' 'HH:mm:ssZ"
let date = dateFormatter.date(from:isoDate)!
现在将日期作为Date(),您可以使用formatDate.string
更改为所需的任何格式。 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
答案 9 :(得分:1)
有时,将字符串迅速转换为Date可能导致返回nil,因此您应该添加“!”标记为format.date函数!
let dateFormatterUK = DateFormatter()
dateFormatterUK.dateFormat = "dd-MM-yyyy"
let stringDate = "11-03-2018"
let date = dateFormatterUK.date(from: stringDate)!
答案 10 :(得分:0)
请使用ISO8601解析库进行此操作。字符串编码的方式太多。不要依赖特定格式,也不要依赖服务器发送总是相同的格式。问题从结尾处的“ Z”开始,并将扩展到该标准的所有变体。解析库将处理所有情况,并始终提供安全的转换-而固定的格式字符串将来可能会失败。
您可以使用这些库之一。它们也可以在CococaPods上使用:
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,这是有充分理由的。
关于该问题:您可以使用NSDateComponents从日期中提取日期组件。网站上的示例完全涵盖了您的情况。
https://developer.apple.com/documentation/foundation/nscalendar/1414841-components?language=objc
请注意,转换日期将考虑时区。您可能要显式设置NSCalendar的“区域设置”。
答案 11 :(得分:0)
正义 步骤1> 从JSON或dataSource获取字符串值
第2步>创建一个局部变量并分配它。
let startDate = CurrentDashBoard.startdate
步骤3>创建DateFormatter的实例。
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变量分配给该变量以进行转换。
let dateFromStringstartDate : NSDate = dateFormatter.date(from: startDate)! as NSDate
步骤6> 通过以下代码提供所需的日期格式。
dateFormatter.dateFormat = "MM/dd/yyyy HH:mm:ss"
步骤6>将其分配给标签/文本
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)
答案 12 :(得分:0)
快速5.查看是否通过了日期:
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")
}
答案 13 :(得分:0)
只需使用SwifterSwift。
maskPreds = model.predict(np.vstack(faces))
答案 14 :(得分:0)
从 iOS 15.0 开始,我们可以优雅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)
答案 15 :(得分:0)
使用字符串扩展名快速将字符串转换为日期 斯威夫特 - 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
}
}
我们使用like
string.toDate(.isoDate)
"1997-05-24".toDate(.isoDate)