Je reçois de mon serveur une date de chaîne dans le fuseau horaire UTC et je dois la convertir en fuseau horaire local.
MON CODE:
let utcTime = "2015-04-01T11:42:00.269Z"
let dateFormatter = NSDateFormatter()
dateFormatter.timeZone = NSTimeZone(name: "UTC")
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
let date = dateFormatter.dateFromString(utcTime)
println("utc: \(utcTime), date: \(date)")
ceci imprime -
utc: 2015-04-01T11: 42: 00.269Z, date: facultative (2015-04-01 11:42:00 +0000)
si je retire
dateFormatter.timeZone = NSTimeZone(name: "UTC")
ça imprime
utc: 2015-04-01T11: 42: 00.269Z, date: facultative (2015-04-01 08:42:00 +0000)
mon fuseau horaire local est UTC +3 et dans la première option je reçois UTC dans la deuxième option je reçois UTC -3
Je devrais avoir
utc: 2015-04-01T11: 42: 00.269Z, date: facultative (2015-04-01 14:42:00 +0000)
Alors, comment puis-je convertir le format de date UTC en heure locale?
Quelque chose dans ce qui suit a fonctionné pour moi dans Objective-C:
// create dateFormatter with UTC time format
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
NSDate *date = [dateFormatter dateFromString:@"2015-04-01T11:42:00"]; // create date from string
// change to a readable time format and change to local time zone
[dateFormatter setDateFormat:@"EEE, MMM d, yyyy - h:mm a"];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *timestamp = [dateFormatter stringFromDate:date];
Je garde ces deux sites Web à portée de main pour convertir différents formats de temps: http://www.w3.org/TR/NOTE-datetime
http://benscheirman.com/2010/06/dealing-with-dates-time-zones-in-objective-c/
Dans Swift ce sera:
// 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")// create date from string
// 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!)
Essayez ceci Swift extension
Swift 4: UTC/GMT ⟺ Local (courant/système)
extension Date {
// Convert local time to UTC (or GMT)
func toGlobalTime() -> Date {
let timezone = TimeZone.current
let seconds = -TimeInterval(timezone.secondsFromGMT(for: self))
return Date(timeInterval: seconds, since: self)
}
// Convert UTC (or GMT) to local time
func toLocalTime() -> Date {
let timezone = TimeZone.current
let seconds = TimeInterval(timezone.secondsFromGMT(for: self))
return Date(timeInterval: seconds, since: self)
}
}
// Try it
let utcDate = Date().toGlobalTime()
let localDate = utcDate.toLocalTime()
print("utcDate - (utcDate)")
print("localDate - (localDate)")
La version rapide de c_rath répond:
// 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!)
Dans Swift 3 cela fonctionne bien:
// create dateFormatter with UTC time format
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
let date = dateFormatter.date(from: "2015-04-01T11:42:00")// create date from string
// change to a readable time format and change to local time zone
dateFormatter.dateFormat = "EEE, MMM d, yyyy - h:mm a"
dateFormatter.timeZone = TimeZone.current
let timeStamp = dateFormatter.string(from: date!)
En développant ce que d’autres ont déjà mentionné, voici une extension pratique NSDate
dans Swift
import Foundation
extension NSDate {
func ToLocalStringWithFormat(dateFormat: String) -> String {
// change to a readable time format and change to local time zone
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = dateFormat
dateFormatter.timeZone = NSTimeZone.localTimeZone()
let timeStamp = dateFormatter.stringFromDate(self)
return timeStamp
}
}
J'ai dû supprimer z et millisecondes de la solution c_rath. Fonctionne dans Swift 4.
extension String {
func fromUTCToLocalDateTime() -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss"
dateFormatter.timeZone = TimeZone(abbreviation: "UTC")
var formattedString = self.replacingOccurrences(of: "Z", with: "")
if let lowerBound = formattedString.range(of: ".")?.lowerBound {
formattedString = "\(formattedString[..<lowerBound])"
}
guard let date = dateFormatter.date(from: formattedString) else {
return self
}
dateFormatter.dateFormat = "EEE, MMM d, yyyy - h:mm a"
dateFormatter.timeZone = TimeZone.current
return dateFormatter.string(from: date)
}
}
Peut-être que vous pouvez essayer quelque chose comme:
extension NSDate {
convenience init(utcDate:String, dateFormat:String="yyyy-MM-dd HH:mm:ss.SSS+00:00") {
// 2016-06-06 00:24:21.164493+00:00
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = dateFormat
dateFormatter.timeZone = NSTimeZone(name: "UTC")
let date = dateFormatter.dateFromString(utcDate)!
let s = NSTimeZone.localTimeZone().secondsFromGMTForDate(date)
let timeInterval = NSTimeInterval(s)
self.init(timeInterval: timeInterval, sinceDate:date)
}
}