如何在 Swift 3 中将 UTC 时间转换为本地时间？

Question

在这里，我想将 UTC 时间转换为 swift 3 中的本地时间格式，但我无法转换它。请帮我解决这个问题

let StrDate = "2018-03-06T13:32:57 +05:30"我想将此日期转换为本地时间格式。

 func convertStringDateFormateUTC(strDate: String,
     strCurrentFormateType:String, strFormateType:String) -> String {
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = strCurrentFormateType
            var strNewdate = NSDate()
            strNewdate = dateFormatter.date(from: strDate)! as NSDate
            dateFormatter.dateFormat = strFormateType;
            dateFormatter.timeZone = TimeZone.init(abbreviation: "UTC")
            return dateFormatter.string(from: strNewdate as Date)
        }

Answer 1

使用TimeZone.current 检测本地时区并应用它。

let formatter = DateFormatter()
// initially set the format based on your datepicker date
var localTimeZoneAbbreviation: String { return TimeZone.current.abbreviation() ?? "UTC" }
//print(localTimeZoneAbbreviation)
formatter.locale = Locale.init(identifier: localTimeZoneAbbreviation)
// convert your string to date
let yourDate = formatter.date(from: strDate)
//then again set the date format which type of output you need

在你的功能中：

func convertStringDateFormateUTC(strDate: String,
                                 strCurrentFormateType:String, strFormateType:String) -> String {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = strCurrentFormateType

    var localTimeZoneAbbreviation: String { return TimeZone.current.abbreviation() ?? "UTC" }
    dateFormatter.locale = Locale.init(identifier: localTimeZoneAbbreviation)

    var strNewdate = NSDate()
    strNewdate = dateFormatter.date(from: strDate)! as NSDate
    dateFormatter.dateFormat = strFormateType;
    dateFormatter.timeZone = TimeZone.init(abbreviation: "UTC")
    return dateFormatter.string(from: strNewdate as Date)
}