如何获得用户的时区？
有谁知道在Swift中获取用户时区的方法吗？
我得到一个特定的时间从数据库中的电视上，然后需要从他们所在的位置减去/添加，以显示他们正确的时间。
编辑/更新：
Xcode 8•Swift 3
var secondsFromGMT: Int { return TimeZone.current.secondsFromGMT() } secondsFromGMT // -7200 如果你需要这个缩写，你可以这样做：
var localTimeZoneAbbreviation: String { return TimeZone.current.abbreviation() ?? "" } localTimeZoneAbbreviation // "GMT-2"
如果你需要这个名字，你可以这样做：
var localTimeZoneName: String { return TimeZone.current.identifier } localTimeZoneName // "America/Sao_Paulo"
如果你想知道所有的时区缩写可用，你可以这样做：
var timeZoneAbbreviations: [String:String] { return TimeZone.abbreviationDictionary } timeZoneAbbreviations // ["CEST": "Europe/Paris", "WEST": "Europe/Lisbon", "CDT": "America/Chicago", "EET": "Europe/Istanbul", "BRST": "America/Sao_Paulo", "EEST": "Europe/Istanbul", "CET": "Europe/Paris", "MSD": "Europe/Moscow", "MST": "America/Denver", "KST": "Asia/Seoul", "PET": "America/Lima", "NZDT": "Pacific/Auckland", "CLT": "America/Santiago", "HST": "Pacific/Honolulu", "MDT": "America/Denver", "NZST": "Pacific/Auckland", "COT": "America/Bogota", "CST": "America/Chicago", "SGT": "Asia/Singapore", "CAT": "Africa/Harare", "BRT": "America/Sao_Paulo", "WET": "Europe/Lisbon", "IST": "Asia/Calcutta", "HKT": "Asia/Hong_Kong", "GST": "Asia/Dubai", "EDT": "America/New_York", "WIT": "Asia/Jakarta", "UTC": "UTC", "JST": "Asia/Tokyo", "IRST": "Asia/Tehran", "PHT": "Asia/Manila", "AKDT": "America/Juneau", "BST": "Europe/London", "PST": "America/Los_Angeles", "ART": "America/Argentina/Buenos_Aires", "PDT": "America/Los_Angeles", "WAT": "Africa/Lagos", "EST": "America/New_York", "BDT": "Asia/Dhaka", "CLST": "America/Santiago", "AKST": "America/Juneau", "ADT": "America/Halifax", "AST": "America/Halifax", "PKT": "Asia/Karachi", "GMT": "GMT", "ICT": "Asia/Bangkok", "MSK": "Europe/Moscow", "EAT": "Africa/Addis_Ababa"]
如果你想知道所有可用的时区名称，你可以这样做：
var timeZoneIdentifiers: [String] { return TimeZone.knownTimeZoneIdentifiers } timeZoneIdentifiers // ["Africa/Abidjan", "Africa/Accra", "Africa/Addis_Ababa", "Africa/Algiers", "Africa/Asmara", "Africa/Bamako", "Africa/Bangui", "Africa/Banjul", "Africa/Bissau", "Africa/Blantyre", "Africa/Brazzaville", "Africa/Bujumbura", "Africa/Cairo", "Africa/Casablanca", "Africa/Ceuta", "Africa/Conakry", "Africa/Dakar", "Africa/Dar_es_Salaam", "Africa/Djibouti", "Africa/Douala", "Africa/El_Aaiun", "Africa/Freetown", "Africa/Gaborone", "Africa/Harare", "Africa/Johannesburg", "Africa/Juba", "Africa/Kampala", "Africa/Khartoum", "Africa/Kigali", "Africa/Kinshasa", "Africa/Lagos", "Africa/Libreville", "Africa/Lome", "Africa/Luanda", "Africa/Lubumbashi", "Africa/Lusaka", "Africa/Malabo", "Africa/Maputo", "Africa/Maseru", "Africa/Mbabane", "Africa/Mogadishu", "Africa/Monrovia", "Africa/Nairobi", "Africa/Ndjamena", "Africa/Niamey", "Africa/Nouakchott", "Africa/Ouagadougou", "Africa/Porto-Novo", "Africa/Sao_Tome", "Africa/Tripoli", "Africa/Tunis", "Africa/Windhoek", "America/Adak", "America/Anchorage", "America/Anguilla", "America/Antigua", "America/Araguaina", "America/Argentina/Buenos_Aires", "America/Argentina/Catamarca", "America/Argentina/Cordoba", "America/Argentina/Jujuy", "America/Argentina/La_Rioja", "America/Argentina/Mendoza", "America/Argentina/Rio_Gallegos", "America/Argentina/Salta", "America/Argentina/San_Juan", "America/Argentina/San_Luis", "America/Argentina/Tucuman", "America/Argentina/Ushuaia", "America/Aruba", "America/Asuncion", "America/Atikokan", "America/Bahia", "America/Bahia_Banderas", "America/Barbados", "America/Belem", "America/Belize", "America/Blanc-Sablon", "America/Boa_Vista", "America/Bogota", …, "Pacific/Marquesas", "Pacific/Midway", "Pacific/Nauru", "Pacific/Niue", "Pacific/Norfolk", "Pacific/Noumea", "Pacific/Pago_Pago", "Pacific/Palau", "Pacific/Pitcairn", "Pacific/Pohnpei", "Pacific/Ponape", "Pacific/Port_Moresby", "Pacific/Rarotonga", "Pacific/Saipan", "Pacific/Tahiti", "Pacific/Tarawa", "Pacific/Tongatapu", "Pacific/Truk", "Pacific/Wake", "Pacific/Wallis"]
还有一些其他信息可能需要：
var isDaylightSavingTime: Bool { return TimeZone.current.isDaylightSavingTime(for: Date()) } print(isDaylightSavingTime) // true (in effect) var daylightSavingTimeOffset: TimeInterval { return TimeZone.current.daylightSavingTimeOffset() } print(daylightSavingTimeOffset) // 3600 seconds (1 hour - daylight savings time) var nextDaylightSavingTimeTransition: Date? { return TimeZone.current.nextDaylightSavingTimeTransition } // "Feb 18, 2017, 11:00 PM" print(nextDaylightSavingTimeTransition?.description(with: .current) ?? "none") nextDaylightSavingTimeTransition // "Saturday, February 18, 2017 at 11:00:00 PM Brasilia Standard Time\n" var nextDaylightSavingTimeTransitionAfterNext: Date? { guard let nextDaylightSavingTimeTransition = nextDaylightSavingTimeTransition else { return nil } return TimeZone.current.nextDaylightSavingTimeTransition(after: nextDaylightSavingTimeTransition) } nextDaylightSavingTimeTransitionAfterNext // "Oct 15, 2017, 1:00 AM"
TimeZone – Apple开发人员Swift文档
Xcode 8.2.1•Swift 3.0.2
Locale.availableIdentifiers Locale.isoRegionCodes Locale.isoCurrencyCodes Locale.isoLanguageCodes Locale.commonISOCurrencyCodes Locale.current.regionCode // "US" Locale.current.languageCode // "en" Locale.current.currencyCode // "USD" Locale.current.currencySymbol // "$" Locale.current.groupingSeparator // "," Locale.current.decimalSeparator // "." Locale.current.usesMetricSystem // false Locale.windowsLocaleCode(fromIdentifier: "pt_BR") // 1,046 Locale.identifier(fromWindowsLocaleCode: 1046) ?? "" // "pt_BR" Locale.windowsLocaleCode(fromIdentifier: Locale.current.identifier) // 1,033 Note: I am in Brasil but I use "en_US" format with all my devices Locale.windowsLocaleCode(fromIdentifier: "en_US") // 1,033 Locale.identifier(fromWindowsLocaleCode: 1033) ?? "" // "en_US" Locale(identifier: "en_US_POSIX").localizedString(forLanguageCode: "pt") // "Portuguese" Locale(identifier: "en_US_POSIX").localizedString(forRegionCode: "br") // "Brazil" Locale(identifier: "en_US_POSIX").localizedString(forIdentifier: "pt_BR") // "Portuguese (Brazil)" TimeZone.current.localizedName(for: .standard, locale: .current) ?? "" // "Brasilia Standard Time" TimeZone.current.localizedName(for: .shortStandard, locale: .current) ?? "" // "GMT-3 TimeZone.current.localizedName(for: .daylightSaving, locale: .current) ?? "" // "Brasilia Summer Time" TimeZone.current.localizedName(for: .shortDaylightSaving, locale: .current) ?? "" // "GMT-2" TimeZone.current.localizedName(for: .generic, locale: .current) ?? "" // "Brasilia Time" TimeZone.current.localizedName(for: .shortGeneric, locale: .current) ?? "" // "Sao Paulo Time" var timeZone: String { return TimeZone.current.localizedName(for: TimeZone.current.isDaylightSavingTime() ? .daylightSaving : .standard, locale: .current) ?? "" } timeZone // "Brasilia Summer Time"
NSTimeZone *timeZone = [NSTimeZone localTimeZone]; NSString *tzName = [timeZone name];
这个名字就像“澳大利亚/悉尼”或者“欧洲/里斯本”。
既然听起来你可能只关心这个大陆，那可能就是你所需要的。
